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    Hall effect ignition

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    LED for electric heater (UK)

    I just put a20k resistor and a led in an outlet to remind me to turn off my inverter. If I had 220v, a 40K should work. You do what you think best.
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    LED for electric heater (UK)

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    LED for electric heater (UK)

    Thanks anologkid. That is exactly right. I got to thinking about this simple circuit and decided to see if the diode was necessary. I used a 20K ohm resistor and a led. The led puts out plenty of lite. When I measured the voltages and current, it surprised me. .. 0027A current and 55v across...
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    LED for electric heater (UK)

    A simple diode, a 6K resistor, and a led is all you need for 120 volts. 12K for 220V if my math is correct.
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    Decoupling capacitor

    I think what you are trying to do is build a burglar alarm. Maybe you want a time delay to give you time to open the door and shut the alarm off before the siren sounds. Or maybe you want the alarm to sound like 15 minutes and then shut off. Do a search for burglar alarm circuits and you will...
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    Decoupling capacitor

    I think the formula is time to 60% of charge=CxR Where C= capacitance in uf R=resistance T=time in seconds Example 100ufx10M=1000seconds
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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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    Current limiting in a CC/CV power supply

    Y es, that's what it does. In my circuit, I didn't use the buck boost, I just hooked it straight to the battery and the battery acts as a huge capacitor. It does create noise in radios but doesn't affect my TV or computer. The MOSFETs barely even get warm. If you want constant current, maybe...
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    Current limiting in a CC/CV power supply

    Do a search for a data sheet for a tl494. It has a schematic for a switching power supply. I built a solar panel pulse width modulated voltage regulator using this IC. It has two inputs, one for voltage and one for current.
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    a/c motor question

    I think that the run capacitor is added to a motor to increase the efficiency. I don't know if there are other differences or not. I would try running it without the cap. and see how it runs, but I live dangerously. My opinion would be that if the speed is dropping too much; your motor is too...
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    DC motor brush question

    Most starter problems are the result of the armature dragging on the field due to worn bushings. If the amps drawn by the starter are high that is your problem. Buy a rebuilt starter or you can rotate the bushings 180 degrees.
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    Transistor gate voltage

    When ever you have two voltage sources it is a good idea to separate them with a optical switch.
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    Air hockey table. Ac adapter issue

    Get another power supply but put a 2 amp fuse in line. If the fuse blows you will know that the game has a fault.
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    Air hockey table. Ac adapter issue

    [QUOElderjason, post: 1733475, member: 48848"]Thank you. I successfully wired the ac adapter to the air hockey table. It works but only for 2 days. I have tested the amps in the ac adapter and I am not getting any amps from the ac adapter. It was brand new, but I am guessing it may have went...
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    Soldering High Amperage Transistors

    You can use short wires of stranded wire , say 16 or 20 ga.,to hook to your large buss wire. I have seen this used in my inverter that are carrying maybe 20 amps. If you measure the resistance of a short piece of 16 ga. wire you will understand that the resistance is VERY LOW. That is the reason...
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    Converting 110v Trafo To 220v Version

    Just put a diode in the power line. This works for resistance loads only. I used it on a heater and it reduced the heat by 50%.
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    Converting 110v Trafo To 220v Version

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    Converting 110v Trafo To 220v Version

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    Help me figure out what is going on with my shoplights

    Usually when acap blows up when you apply power it means the polarity is backwards. I did that once! Very loud!
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