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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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Posted to sci.electronics.design,sci.electronics.repair,sci.electronics.equipment
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Anthony Fremont wrote:
MassiveProng wrote: On Tue, 06 Mar 2007 19:06:50 GMT, Robert Baer And that is *exactly* what i proposed with the "trick"; place the DVM on the 200mVFS scale, add a shunt 1.11Meg resistor (that means in parallel; use the dictionary) across the meter and the sensitivity of this network is 200nAFS. Simple ohms law... Simple Ohms's law also states that when you series that mess with your circuit under test, all the voltage will drop on your precious resistor/meter set-up , and there won't be any in the circuit you wish to examine. Really now. And I thought that Ohm's Law stated that the voltage would be split up in a predictable way. In other words, dumbass, the reason that shunts are of low ohmic value is so they do not modify the circuit you are attempting to examine. Stupid me, I thought they were for fire prevention. Your stupid **** certainly would do just that. Your lack of understanding that a current meter needs to be of low resistance is quite a tell as well. You must be a digital guy, and seemingly not a very good one to miss this basic. You really aren't getting it are you? This is about measuring very small currents, the large resistance doesn't have to drop any significant voltage. I can't believe you have such an inept understanding of Ohm's law that you keep harping about. The world is not all about 200A and 15kV there are people getting things done with nanowatts of power. Just think about it, how much voltage drop do you get with 50nA thru a .01Ohm resistor? How would you measure 500 femtovolts? You have no concept of scale. I gave up responding to him a while back as being a useless waste of time. |
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