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#1
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A circuit that outputs 3V when there was a pulse
Is there a simple circuit that does that? -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_...sub_addressesa |
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#2
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A circuit that outputs 3V when there was a pulse
On 8/12/16 6:09 AM, Mr. Man-wai Chang wrote:
Is there a simple circuit that does that? How long does the 3V need to last? What should happen if there is another pulse during the desired "3V on" duration? Jon |
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#3
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A circuit that outputs 3V when there was a pulse
On 12/08/16 21:08, Jon Danniken wrote:
How long does the 3V need to last? What should happen if there is another pulse during the desired "3V on" duration? Jon I want to flash a super-bright LED when there is an incoming phone call. Talking about the good, old fixed-line telephone. -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_...sub_addressesa |
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#4
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A circuit that outputs 3V when there was a pulse
On Fri, 12 Aug 2016 20:09:04 +0800, "Mr. Man-wai Chang"
wrote: Is there a simple circuit that does that? Pretty easy to do with chips. Get a ring detector chip and an SCR. Connect the ring detect to the gate of the SCR and reset it by opening the circuit to the LED on the SCR anode. |
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#5
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A circuit that outputs 3V when there was a pulse
On 8/12/16 9:12 AM, Mr. Man-wai Chang wrote:
On 12/08/16 21:08, Jon Danniken wrote: How long does the 3V need to last? What should happen if there is another pulse during the desired "3V on" duration? Jon I want to flash a super-bright LED when there is an incoming phone call. Talking about the good, old fixed-line telephone. You mean to make something like this: https://www.harriscomm.com/catalog/p...1fl4u6n28sqc57 |
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#6
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A circuit that outputs 3V when there was a pulse
On Friday, August 12, 2016 at 9:41:15 AM UTC-5, Retired wrote:
On 8/12/16 9:12 AM, Mr. Man-wai Chang wrote: On 12/08/16 21:08, Jon Danniken wrote: How long does the 3V need to last? What should happen if there is another pulse during the desired "3V on" duration? Jon I want to flash a super-bright LED when there is an incoming phone call. Talking about the good, old fixed-line telephone. You mean to make something like this: https://www.harriscomm.com/catalog/p...1fl4u6n28sqc57 I'm lazy, if someone already manufactures and sells something for a reasonable price, I'll buy it rather than build it. I can always customize an existing product. ^_^ [8~{} Uncle Lazy Monster |
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#7
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A circuit that outputs 3V when there was a pulse
On Friday, August 12, 2016 at 10:38:23 AM UTC-4, wrote:
On Fri, 12 Aug 2016 20:09:04 +0800, "Mr. Man-wai Chang" wrote: Is there a simple circuit that does that? Pretty easy to do with chips. Get a ring detector chip and an SCR. Connect the ring detect to the gate of the SCR and reset it by opening the circuit to the LED on the SCR anode. A quick google produced this, which is cheap and should serve the purpose: https://www.vellemanstore.com/en/vel...h-relay-output That's first thing I saw, probably more on Ebay, etc. |
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#8
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A circuit that outputs 3V when there was a pulse
On Friday, August 12, 2016 at 12:08:20 PM UTC-5, trader_4 wrote:
On Friday, August 12, 2016 at 10:38:23 AM UTC-4, wrote: On Fri, 12 Aug 2016 20:09:04 +0800, "Mr. Man-wai Chang" wrote: Is there a simple circuit that does that? Pretty easy to do with chips. Get a ring detector chip and an SCR. Connect the ring detect to the gate of the SCR and reset it by opening the circuit to the LED on the SCR anode. A quick google produced this, which is cheap and should serve the purpose: https://www.vellemanstore.com/en/vel...h-relay-output That's first thing I saw, probably more on Ebay, etc. The Mossad uses something like that to trigger vermin eliminating explosives. ^_^ [8~{} Uncle Ring Monster |
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#9
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A circuit that outputs 3V when there was a pulse
On 13/08/16 00:50, Uncle Monster wrote:
I'm lazy, if someone already manufactures and sells something for a reasonable price, I'll buy it rather than build it. I can always customize an existing product. ^_^ No harm looking for alternatives and DIY solutions.... -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_...sub_addressesa |
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#10
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A circuit that outputs 3V when there was a pulse
On 12/08/16 22:38, wrote:
Pretty easy to do with chips. Get a ring detector chip and an SCR. Connect the ring detect to the gate of the SCR and reset it by opening the circuit to the LED on the SCR anode. Could you name one chip? -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_...sub_addressesa |
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#11
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A circuit that outputs 3V when there was a pulse
On 13/08/16 01:13, Uncle Monster wrote:
The Mossad uses something like that to trigger vermin eliminating explosives. ^_^ You need the right detonators. I think they are being tracked carefully by all governments.  -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_...sub_addressesa |
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#12
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A circuit that outputs 3V when there was a pulse
On Friday, August 12, 2016 at 12:29:22 PM UTC-5, Mr. Man-wai Chang wrote:
On 12/08/16 22:38, wrote: Pretty easy to do with chips. Get a ring detector chip and an SCR. Connect the ring detect to the gate of the SCR and reset it by opening the circuit to the LED on the SCR anode. Could you name one chip? -- Heck, buy a cheap dollar store telephone and you have all the parts right there to modify for your needs. o_O [8~{} Uncle Cheap Monster |
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#13
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A circuit that outputs 3V when there was a pulse
On Fri, 12 Aug 2016 21:12:12 +0800, Mr. Man-wai Chang wrote:
I want to flash a super-bright LED when there is an incoming phone call. Talking about the good, old fixed-line telephone. How bright do you need? They did this 50 years ago with a neon bulb. No extra diodes, resistors, etc. are required. I assume that the voltage & current are still within the same tolerances. -- http://mduffy.x10host.com/index.htm |
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#14
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A circuit that outputs 3V when there was a pulse
On Fri, 12 Aug 2016 22:06:07 -0400, Mike Duffy
wrote: On Fri, 12 Aug 2016 21:12:12 +0800, Mr. Man-wai Chang wrote: I want to flash a super-bright LED when there is an incoming phone call. Talking about the good, old fixed-line telephone. How bright do you need? They did this 50 years ago with a neon bulb. No extra diodes, resistors, etc. are required. I assume that the voltage & current are still within the same tolerances. I thought he wanted the LED to latch on to show a missed call. If you just want to light a LED when the bell is ringing I would put a couple hundred volt silicon diode (1n4003 or similar) in series with a 6.8k or so resistor and the LED. That should get you close to a typical 15ma through the LED. Lower ohm resistor will get you a brighter LED ... until you blow it. Check the spec if you want to be pedantic about it. Dr Ohm will give you guidance based on 100v or so ring voltage. |
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#15
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A circuit that outputs 3V when there was a pulse
On 8/12/2016 10:28 AM, Mr. Man-wai Chang wrote:
On 13/08/16 00:50, Uncle Monster wrote: I'm lazy, if someone already manufactures and sells something for a reasonable price, I'll buy it rather than build it. I can always customize an existing product. ^_^ No harm looking for alternatives and DIY solutions.... Google ne555. |
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#16
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A circuit that outputs 3V when there was a pulse
On 13/08/16 10:06, Mike Duffy wrote:
How bright do you need? They did this 50 years ago with a neon bulb. No extra diodes, resistors, etc. are required. I assume that the voltage & current are still within the same tolerances. I found that neon bulb inside the handset of the fixed-line telephone. I wanna make it flash brighter, so I want to replace with a modern LED. SO how could I replace this neon bulb with a modern LED? -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_...sub_addressesa |
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#17
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A circuit that outputs 3V when there was a pulse
On 13/08/16 10:38, Bob F wrote:
Google ne555. Thanks! -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_...sub_addressesa |
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#18
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A circuit that outputs 3V when there was a pulse
On 13/08/16 01:50, Uncle Monster wrote:
Heck, buy a cheap dollar store telephone and you have all the parts right there to modify for your needs. o_O Not an electronic person... so I need some guidance, Master! -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_...sub_addressesa |
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#19
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A circuit that outputs 3V when there was a pulse
On Saturday, August 13, 2016 at 9:38:42 AM UTC-4, Mr. Man-wai Chang wrote:
On 13/08/16 10:06, Mike Duffy wrote: How bright do you need? They did this 50 years ago with a neon bulb. No extra diodes, resistors, etc. are required. I assume that the voltage & current are still within the same tolerances. I found that neon bulb inside the handset of the fixed-line telephone. I wanna make it flash brighter, so I want to replace with a modern LED. SO how could I replace this neon bulb with a modern LED? You;ve been given several suggestions now, from a cheap ring detector module that has a relay output that you can buy, to putting a diode and resistor with LED on the phone line. And you didn't initially say where this has to fit, exactly what you're trying to do. It's still far from clear. Now it sounds like you want to replace an existing neon bulb in an old phone, where that bulb is probably driven directly by the ring voltage? In that case, Gfre's solution of a diode and resistor with LED sounds like it could work. |
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#20
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A circuit that outputs 3V when there was a pulse
On 13/08/16 22:44, trader_4 wrote:
still far from clear. Now it sounds like you want to replace an existing neon bulb in an old phone, where that bulb is probably driven directly by the ring voltage? In that case, Gfre's solution of a diode and resistor with LED sounds like it could work. Thanks! Will look into that and do my homework first. -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_...sub_addressesa |
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#21
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A circuit that outputs 3V when there was a pulse
On 8/13/2016 6:39 AM, Mr. Man-wai Chang wrote:
On 13/08/16 01:50, Uncle Monster wrote: Heck, buy a cheap dollar store telephone and you have all the parts right there to modify for your needs. o_O Not an electronic person... so I need some guidance, Master! if you are not an electronic person, just buy something that has been built by electronic people: http://www.smithgear.com/krn-ts-082.html http://www.smithgear.com/whps-15a-wpw.html http://www.healthandcare.co.uk/ampli...cator-100.html http://www.homedepot.com/p/Viking-Vi...R-1B/204400366 http://www.telephonecentral.com/Prod...p__202178.aspx http://www.dlf-data.org.uk/product.p...uct_id=0041439 http://www.tele-movers.com/signaling.htm |
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