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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Hi,
I'm completely new to electronics, but I'd like to get started. Perhaps it is just me getting tired of this wasteful culture where devices are disposable, or just me being a tightwad, but I'd really love to learn how to repair my own stuff, and know how various little DIY projects actually work as opposed to putting them blindly together. Are there any books that you guys might recommend to help me get started? I've always been a software person by training and trade, so you can say I have absolutely no background in this, except for being a geek. Thanks for any tips and recommendations ![]() |
#2
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"Woei Shyang" wrote in message
news:[email protected]... Hi, I'm completely new to electronics, but I'd like to get started. Perhaps it is just me getting tired of this wasteful culture where devices are disposable, or just me being a tightwad, but I'd really love to learn how to repair my own stuff, and know how various little DIY projects actually work as opposed to putting them blindly together. Are there any books that you guys might recommend to help me get started? I've always been a software person by training and trade, so you can say I have absolutely no background in this, except for being a geek. Thanks for any tips and recommendations ![]() http://www.repairfaq.org/REPAIR/ http://library.thinkquest.org/16497/intro/index.html Here's a couple links to get you started... Mark Z. |
#3
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Woei Shyang wrote:
Hi, I'm completely new to electronics, but I'd like to get started. Perhaps it is just me getting tired of this wasteful culture where devices are disposable, or just me being a tightwad, but I'd really love to learn how to repair my own stuff, and know how various little DIY projects actually work as opposed to putting them blindly together. Are there any books that you guys might recommend to help me get started? I've always been a software person by training and trade, so you can say I have absolutely no background in this, except for being a geek. Thanks for any tips and recommendations ![]() http://jricher.com/NEETS/ This will give you a solid foundation if you read through the modules, answer the quiz questions and ask the folks in sci.electronics.basics to get you unstuck. It is a fascinating hobby. --Winston |
#4
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On Jan 19, 6:20*pm, Woei Shyang
wrote: Hi, I'm completely new to electronics, but I'd like to get started. Perhaps it is just me getting tired of this wasteful culture where devices are disposable, or just me being a tightwad, but I'd really love to learn how to repair my own stuff, and know how various little DIY projects actually work as opposed to putting them blindly together. Are there any books that you guys might recommend to help me get started? I've always been a software person by training and trade, so you can say I have absolutely no background in this, except for being a geek. Thanks for any tips and recommendations ![]() For me, seeing how things work reading about how things work. Radio Shack no longer makes experimenters' kits, so I would check out Make Magazine's introduction to electronics: http://www.makershed.com/category_s/49.htm |
#5
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Experimenter's kits are still available. You really need one of these,
especially as Heath, Allied, EICO, etc, have long been out the kit business. Allied had a wonderful kit, which cost $30 50 years ago. It was a small console, with a pegboard for the circuits on the back. Someone should revive it, but it would be pretty pricey. (Still have the manual. Don't know why I didn't save the unit itself.) |
#6
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![]() "Mark Zacharias" wrote in message ... "Woei Shyang" wrote in message news:[email protected]... Hi, I'm completely new to electronics, but I'd like to get started. Perhaps it is just me getting tired of this wasteful culture where devices are disposable, or just me being a tightwad, but I'd really love to learn how to repair my own stuff, and know how various little DIY projects actually work as opposed to putting them blindly together. Are there any books that you guys might recommend to help me get started? I've always been a software person by training and trade, so you can say I have absolutely no background in this, except for being a geek. Thanks for any tips and recommendations ![]() http://www.repairfaq.org/REPAIR/ http://library.thinkquest.org/16497/intro/index.html Here's a couple links to get you started... Mark Z. There's a few beginner books occasionally get reposted on alt.binaries.e-book.technical, not to mention magazines like Everyday Practical Electronics, Nuts&Volts, Circuit cellar, Elektor etc. Beware though, there's a couple of ******s posting pages of virus's! - Avoid RARs and other archive files untill you know which posters you can trust. |
#7
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On Jan 21, 1:02*pm, Nelson wrote:
On Sat, 21 Jan 2012 04:39:46 -0500, William Sommerwerck wrote (in article ): Experimenter's kits are still available. You really need one of these, especially as Heath, Allied, EICO, etc, have long been out the kit business. Allied had a wonderful kit, which cost $30 50 years ago. It was a small console, with a pegboard for the circuits on the back. Someone should revive it, but it would be pretty pricey. (Still have the manual. Don't know why I didn't save the unit itself.) Radio Shack has a couple of nice ones. *I bought this one for my kid: *http://www.radioshack.com/product/in...ductId=3814337 Wow, I missed that one. Aside from a few small Radio Shack branded items, everything in the hobby kit selection on their website was either Make or Velleman. |
#8
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Poor man's fireworks: Always connect electrolytic caps the
wrong-way-round before applying power! ![]() Would that it /were/ fireworks. The caps usually explode and emit a foul-smelling gas. |
#9
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On 1/19/2012 9:20 PM, Woei Shyang wrote:
Hi, I'm completely new to electronics, but I'd like to get started. Perhaps it is just me getting tired of this wasteful culture where devices are disposable, or just me being a tightwad, but I'd really love to learn how to repair my own stuff, and know how various little DIY projects actually work as opposed to putting them blindly together. Are there any books that you guys might recommend to help me get started? I've always been a software person by training and trade, so you can say I have absolutely no background in this, except for being a geek. Thanks for any tips and recommendations ![]() Poor man's fireworks: Always connect electrolytic caps the wrong-way-round before applying power! ![]() |
#10
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"Ian Field" wrote in message
... "William Sommerwerck" wrote in message ... Poor man's fireworks: Always connect electrolytic caps the wrong-way-round before applying power! ![]() Would that it /were/ fireworks. The caps usually explode and emit a foul-smelling gas. Tantalum caps can be a bit more entertaining. They give a tantalizing performance, no doubt. |
#11
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![]() "William Sommerwerck" wrote in message ... Poor man's fireworks: Always connect electrolytic caps the wrong-way-round before applying power! ![]() Would that it /were/ fireworks. The caps usually explode and emit a foul-smelling gas. Tantalum caps can be a bit more entertaining. |
#12
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![]() "William Sommerwerck" wrote in message ... "Ian Field" wrote in message ... "William Sommerwerck" wrote in message ... Poor man's fireworks: Always connect electrolytic caps the wrong-way-round before applying power! ![]() Would that it /were/ fireworks. The caps usually explode and emit a foul-smelling gas. Tantalum caps can be a bit more entertaining. They give a tantalizing performance, no doubt. And just as smelly as alu caps too. |
#13
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![]() Mark Zacharias wrote: http://library.thinkquest.org/16497/intro/index.html I don't like this much. Defining voltage in terms of resistance. It should be in terms of coulombs and joules. "Voltage is represented by the letter E. The basic unit of measure is volts or the letter V. One volt will push 1 amp of current through 1 ohm of resistance. Resistance will be discussed in a later section." -- Reply in group, but if emailing add one more zero, and remove the last word. |
#14
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![]() Winston wrote: http://jricher.com/NEETS/ Yeah, I wish they had labs to go with that. Guided experiments are what's missing from almost all good electronic courseware. The lab manual for The Art of Electronics is available and costs about half the price of the main text, so that might be helpful. -- Reply in group, but if emailing add one more zero, and remove the last word. |
#15
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![]() Nelson wrote: On Sun, 22 Jan 2012 20:33:26 -0500, Tom Del Rosso wrote (in article ): Mark Zacharias wrote: http://library.thinkquest.org/16497/intro/index.html I don't like this much. Defining voltage in terms of resistance. It should be in terms of coulombs and joules. "Voltage is represented by the letter E. The basic unit of measure is volts or the letter V. One volt will push 1 amp of current through 1 ohm of resistance. Resistance will be discussed in a later section." Do you really think it's necessary for someone trying to get started in electronics as a hobby to to worry about such niceties? Defining voltage in terms of resistance or "pressure" is much more intuitive to a neophyte. Yes, I can say that it is harder to learn when you start by learning it wrong. If they want to talk about pressure then at least they can do it conceptually instead of quantitatively, and it doesn't take a great effort for them to make clear that they are using analogy. When they take the ass-backwards approach of defining voltage quantitatively in terms of resistance then they are only making it necessary to unlearn all that and start over from scratch some day. Defining things backwards is not a mere detail. -- Reply in group, but if emailing add one more zero, and remove the last word. |
#16
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On Jan 23, 11:13*am, "Tom Del Rosso"
wrote: Nelson wrote: On Sun, 22 Jan 2012 20:33:26 -0500, Tom Del Rosso wrote (in article ): Mark Zacharias wrote: http://library.thinkquest.org/16497/intro/index.html I don't like this much. *Defining voltage in terms of resistance. It should be in terms of coulombs and joules. "Voltage is represented by the letter E. The basic unit of measure is volts or the letter V. One volt will push 1 amp of current through 1 ohm of resistance. Resistance will be discussed in a later section." Do you really think it's necessary for someone trying to get started in electronics as a hobby to to worry about such niceties? *Defining voltage in terms of resistance or "pressure" is much more intuitive to a neophyte. Yes, I can say that it is harder to learn when you start by learning it wrong. If they want to talk about pressure then at least they can do it conceptually instead of quantitatively, and it doesn't take a great effort for them to make clear that they are using analogy. *When they take the ass-backwards approach of defining voltage quantitatively in terms of resistance then they are only making it necessary to unlearn all that and start over from scratch some day. Defining things backwards is not a mere detail. Let people get a good working understanding of things before you drown them with abstractions. Thank goodness when I first became interested in electronics, no one sat me down and emphasized the difference between the abvolt and the statvolt. |
#17
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![]() spamtrap1888 wrote: Let people get a good working understanding of things before you drown them with abstractions. Thank goodness when I first became interested in electronics, no one sat me down and emphasized the difference between the abvolt and the statvolt. I didn't say anything like that at all. I said resistance is defined in terms of voltage and current, not the other way around, and if you aren't ready to define voltage then just don't do it. You can omit lots of things without being compelled to teach something that isn't so, but most "science" teachers think the resistor color code is the root of everything. And lots of abstrations are taught to 5-year-olds, like the concept of time. You don't have to teach them SR. You just teach them how things are affected by time. But you don't teach them that the clock makes time happen, do you? Kids are more capable of learning abstractions than adults. Adults assume incorrectly that kids need an explanation for abstractions, so they provide one that is wrong and make learning harder rather than easier. -- Reply in group, but if emailing add one more zero, and remove the last word. |
#18
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On 24/01/2012 5:39 AM, Tom Del Rosso wrote:
spamtrap1888 wrote: Let people get a good working understanding of things before you drown them with abstractions. Thank goodness when I first became interested in electronics, no one sat me down and emphasized the difference between the abvolt and the statvolt. I didn't say anything like that at all. I said resistance is defined in terms of voltage and current, not the other way around, and if you aren't ready to define voltage then just don't do it. You can omit lots of things without being compelled to teach something that isn't so, but most "science" teachers think the resistor color code is the root of everything. And lots of abstrations are taught to 5-year-olds, like the concept of time. You don't have to teach them SR. You just teach them how things are affected by time. But you don't teach them that the clock makes time happen, do you? Kids are more capable of learning abstractions than adults. Adults assume incorrectly that kids need an explanation for abstractions, so they provide one that is wrong and make learning harder rather than easier. That's how it's explained: https://plus.google.com/photos/11044...60195642074977 |
#19
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On Jan 23, 6:23*pm, TonyS wrote:
On 24/01/2012 5:39 AM, Tom Del Rosso wrote: spamtrap1888 wrote: Let people get a good working understanding of things before you drown them with abstractions. Thank goodness when I first became interested in electronics, no one sat me down and emphasized the difference between the abvolt and the statvolt. I didn't say anything like that at all. *I said resistance is defined in terms of voltage and current, not the other way around, and if you aren't ready to define voltage then just don't do it. You can omit lots of things without being compelled to teach something that isn't so, but most "science" teachers think the resistor color code is the root of everything. And lots of abstrations are taught to 5-year-olds, like the concept of time. You don't have to teach them SR. *You just teach them how things are affected by time. *But you don't teach them that the clock makes time happen, do you? Kids are more capable of learning abstractions than adults. *Adults assume incorrectly that kids need an explanation for abstractions, so they provide one that is wrong and make learning harder rather than easier. That's how it's explained:https://plus.google.com/photos/11044...bums/567266019... Where are the coulombs and joules in that drawing? The best way to explain three new concepts is not by adding two more new concepts. Drilling down to bedrock is not always the best way to learn something. As a kid, the current convention always bothered me, because I knew current was a flow of electrons, and electrons went the other way. Did current reflect a hole-centric way of looking at things? But then I realized electrons were irrelevant to my study of current flow. They're important to a deeper understanding of electronics, but if you're not operating at that level they just get in the way. |
#20
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On Jan 23, 1:39*pm, "Tom Del Rosso" wrote:
spamtrap1888 wrote: Let people get a good working understanding of things before you drown them with abstractions. Thank goodness when I first became interested in electronics, no one sat me down and emphasized the difference between the abvolt and the statvolt. I didn't say anything like that at all. *I said resistance is defined in terms of voltage and current, not the other way around, and if you aren't ready to define voltage then just don't do it. I don't think you sufficiently understand voltage. Explain to me the difference between the abvolt and the statvolt, to prove me wrong. You can omit lots of things without being compelled to teach something that isn't so, but most "science" teachers think the resistor color code is the root of everything. And lots of abstrations are taught to 5-year-olds, like the concept of time. You don't have to teach them SR. *You just teach them how things are affected by time. *But you don't teach them that the clock makes time happen, do you? You don't start by teaching them about the leap second if you want them to learn about the big hand and the little hand. Similarly they don't need to know about how the earth wobbles on its access to know when it's a quarter to five. Kids are more capable of learning abstractions than adults. *Adults assume incorrectly that kids need an explanation for abstractions, so they provide one that is wrong and make learning harder rather than easier. Don't make up stuff, but don't teach them more than they can absorb. If some kid asks how an airplane flies, you don't need to start your explanation by teaching him tensor mathematics. |
#21
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"Nelson" wrote in message
.com... On Tue, 24 Jan 2012 03:23:58 -0500, spamtrap1888 wrote (in article ): Drilling down to bedrock is not always the best way to learn something. As a kid, the current convention always bothered me, because I knew current was a flow of electrons, and electrons went the other way. Did current reflect a hole-centric way of looking at things? No. See below. I still find myself occasionally getting momentarily hung up on this... and I have Master's Degrees in Electrical Engineering and Physics :-) I have always found "holes" counterintuitive. It's too bad the conventions didn't evolve so that they were consistent with the underlying physics. It's as if we defined the basic unit of heat as the "friggie" so that when a body heated up, we would say it lost so many friggies. Positive and negative, as you point out, are misnamed. This is supposedly the fault of B. Franklin, who said that electrical particles flowed from an source with an excess to a sink with fewer -- which is basically correct. He called the excess side "positive", not knowing that the charge of the electrical particles would eventually be called "negative". BY CONVENTION, current flows from positive to negative. This has never much bothered me, nor has hole flow. (A hole is a place in the lattice where an electron "should" be.) Now, if someone could explain exactly how -- on a quantum level -- junction transistors work -- I would be delighted. I've yet to find a book that makes it clear. (FETs are easy.) |
#22
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![]() spamtrap1888 wrote: On Jan 23, 1:39 pm, "Tom Del Rosso" wrote: spamtrap1888 wrote: Let people get a good working understanding of things before you drown them with abstractions. Thank goodness when I first became interested in electronics, no one sat me down and emphasized the difference between the abvolt and the statvolt. I didn't say anything like that at all. I said resistance is defined in terms of voltage and current, not the other way around, and if you aren't ready to define voltage then just don't do it. I don't think you sufficiently understand voltage. Explain to me the difference between the abvolt and the statvolt, to prove me wrong. They're just different units. Convert by multiplying by a constant. That's all. It's like using the bell instead of the decibel or microns instead of angstroms. That's not a big deal. You don't start by teaching them about the leap second if you want them to learn about the big hand and the little hand. Similarly they don't need to know about how the earth wobbles on its access to know when it's a quarter to five. Which has nothing to do with avoiding teaching them something that's wrong. Resistance is not a fundamental quantity. It's nothing but the ratio of voltage and current, and only when measured in the absence of other factors which are fundamental, so it's not something you should refer to when explaining voltage. The last sentence in the cited web page could simply be deleted and nothing would be lost. I'm baffled why you think it's so important to include it. -- Reply in group, but if emailing add one more zero, and remove the last word. |
#23
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![]() spamtrap1888 wrote: Drilling down to bedrock is not always the best way to learn something. You can never reach bedrock. As a kid, the current convention always bothered me, because I knew current was a flow of electrons, and electrons went the other way. Did current reflect a hole-centric way of looking at things? So you just think of current as an abstraction. You don't think about holes. You didn't need to learn (at first) about holes. But you also didn't need to learn a lie about positive particles. It can just be left as an abstraction. So can voltage. -- Reply in group, but if emailing add one more zero, and remove the last word. |
#24
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![]() spamtrap1888 wrote: Where are the coulombs and joules in that drawing? Coulombs and joules are in the other drawing, in the web page in question. They were included without naming them in an abstract and intuitive way. Then the author went off in the wrong direction when he should have just left it as an abstraction. -- Reply in group, but if emailing add one more zero, and remove the last word. |
#25
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On Tue, 24 Jan 2012 00:23:58 -0800 (PST), spamtrap1888
wrote: snip Kids are more capable of learning abstractions than adults. *Adults assume incorrectly that kids need an explanation for abstractions, so they provide one that is wrong and make learning harder rather than easier. Do not be too quick to judge on that. Mostly learning it wrong first is the real stumbling block rather than abstraction itself. Learning formal abstraction is a different issue, and needs to be treated as such. That's how it's explained:https://plus.google.com/photos/11044...bums/567266019... Where are the coulombs and joules in that drawing? The best way to explain three new concepts is not by adding two more new concepts. Drilling down to bedrock is not always the best way to learn something. As a kid, the current convention always bothered me, because I knew current was a flow of electrons, and electrons went the other way. Did current reflect a hole-centric way of looking at things? But then I realized electrons were irrelevant to my study of current flow. They're important to a deeper understanding of electronics, but if you're not operating at that level they just get in the way. What happened was merely an incorrect A|B choice long before there was anything enough information to decide correctly. But it has been embedded in the ASSumptions for hundreds of years and there is no reasonable way of correcting it. Not that electrons move in conductors at anything like light speed. ?-) |
#26
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On Jan 24, 7:32*am, "Tom Del Rosso" wrote:
spamtrap1888 wrote: On Jan 23, 1:39 pm, "Tom Del Rosso" wrote: spamtrap1888 wrote: Let people get a good working understanding of things before you drown them with abstractions. Thank goodness when I first became interested in electronics, no one sat me down and emphasized the difference between the abvolt and the statvolt. I didn't say anything like that at all. I said resistance is defined in terms of voltage and current, not the other way around, and if you aren't ready to define voltage then just don't do it. I don't think you sufficiently understand *voltage. Explain to me the difference between the abvolt and the statvolt, to prove me wrong. They're just different units. *Convert by multiplying by a constant. *That's all. *It's like using the bell instead of the decibel or microns instead of angstroms. *That's not a big deal. That's like saying a pound is a unit of mass. Try again. You don't start by teaching them about the leap second if you want them to learn about the big hand and the little hand. Similarly they don't need to know about how the earth wobbles on its access to know when it's a quarter to five. Which has nothing to do with avoiding teaching them something that's wrong. Resistance is not a fundamental quantity. *It's nothing but the ratio of voltage and current, and only when measured in the absence of other factors which are fundamental, so it's not something you should refer to when explaining voltage. What do you mean by fundamental property? Resistance (more precisely, resistivity) is a materials property, as is potential difference. If I make a cell (defining the voltage) and apply it to a hunk of material (geometry plus a property of the material), that defines the current that flows through the material. |
#27
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![]() "Woei Shyang" wrote in message news:[email protected]... Hi, I'm completely new to electronics, but I'd like to get started. Perhaps it is just me getting tired of this wasteful culture where devices are disposable, or just me being a tightwad, but I'd really love to learn how to repair my own stuff, and know how various little DIY projects actually work as opposed to putting them blindly together. Are there any books that you guys might recommend to help me get started? I've always been a software person by training and trade, so you can say I have absolutely no background in this, except for being a geek. Thanks for any tips and recommendations ![]() The group: alt.binaries.e-book.technical has the book; Starting Electronics 4th ed K. brindley Newnes 2011 you can download free right now. |
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