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    4011 IC

    This is the timing section of a inverter that I built. The inverter runs a refrigerator. The delay is to allow the pressure in the fridge to bleed off so the compressor will start. The problem is that the IC gate acts as a amplifier instead of a switch, between 6.2V and 6.5V. This causes the...
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    Blocking Oscillator

    I used to have a circuit for a blocking oscilator that I used to change 12v to120 with a transformer,but I lost it. This is the closest circuit that I could find. I have tried different values of resister and capacitor to resonate with the transformer but I can't get it to go. Can someone...
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    Gas station skimmers

    I was trying to learn how to not get my debit card information stolen and I ran across this article. It's a lot beyond my knowledge level but I thought it might be of interest to some others that understand PICs. https://learn.sparkfun.com/tutorials/gas-pump-skimmers/all
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    intermittent display

    I have a ford tw35 tractor that has a display for the rpm and other functions. The problem is, it doesn't always work. I took it off and there are a lot of contacts that I cleaned and put back together. It worked a lot better for a while but now it is worse again. Is there a way to fix it?
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    solar panel voltage regulator

    I am building a solar panel voltage regulator to charge 12v batteries, using two 555 ICs. One is just a oscillator and the other is a monostable that I am using to vary the pulse from 0 to 99%. I have already built one that just regulates a steady voltage, but the manufacturers say that a...
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    hall effect sensors

    I have a couple of hall effect sensors from Jameco electronics, that I want to experiment with.Jameco has very little info. on them. They are RS41 by Honeywell but I can't find any examples of circuits or pin outs for them. If anyone knows the pinout or a circuit I could sure use the help. I...
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    voltage standard

    I would like to find a way to accurately set my voltmeters, especially on DC. I have several and they are all different. :)
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