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  1. T

    Relay question

    Here is a simple 8 second timer. You can also use a Schmidt trigger [Mod note: cropped and resized huge images]
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    Magneto kill terminal...

    After going thru 3 coils on a 2.5 hp honda clone engine, I now idle the engine down and kill the engine with the choke. Been a few years now and I haven't had to buy another coil.
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    4011 IC

    Thanks Audio Guru. I want to stay with a nand gate because I use the other gates. It looks like the 4093 is what I need and I can do everything with one IC.
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    4011 IC

    Thanks AnologKid. I will try the feedback resistor and see if this circuit will work till I can get the 4093.
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    4011 IC

    Thanks Anolog
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    4011 IC

    Thanks Bertus! This site is a big help; I've learned a lot from it. I will get some of those. Now what to do with a bunch of 4011s?
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    4011 IC

    The inverter requires +5V. The 15K resistor drops the voltage to 5V.
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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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    Identifying LCD Display - VDO Logic Combi

    Thanks for your answer. I will clean it again, and see what happens.
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    Identifying LCD Display - VDO Logic Combi

    I have a display on my tractor like that on my tractor. I took it apart and cleaned the contacts and it worked a little better but unless you press on the screen it doesn't always work. Is there a grease or something to put on the contacts to make them conduct?.
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    diode question

    I converted my welder to dc. I used 6 full wave rectifiers. Everyone said it wouldn't work. Been several years, still working good.
  12. T

    Basic Pulse generation help

    Ok, I missed that completely!
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    Basic Pulse generation help

    I see a 5 volt waveform in the first post.
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    Basic Pulse generation help

  15. T

    Basic Pulse generation help

    You might need a 5V zener diode because it looks like that circuit will put out 12V.
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    Stumped on this circuit blinking led with 1 transistor

    I just built this circuit. I used a 2222A transistor, 13.8V and 330mfd capacitor and a 500 ohm resistor, It blinked very fast, after I turned the transistor around, ha ha. With a 5.6K resistor and a 470mfd cap. it blinked at 1.5 seconds. The transistor triggered at a little over 10V. A very...
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    Stumped on this circuit blinking led with 1 transistor

    It could be that you have the transistor hooked the right way, not backwards, and your finger is acting as a antenna and biasing the transistor on.
  18. T

    My new power supply

    You sure that's a power supply? Could it be a audio amp?
  19. T

    Solar Charger Help Please

    I guess the link doesn't work for some reason. Just do a search for tl494.
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    Solar Charger Help Please

    http://Web results TL494 Pulse-Width-Modulation Control ... - Texas Instruments PDFTexas Instruments › lit › gpn › tl494 Hi. I used this chip and the circuit that is provided except I didn't use a coil or capacitor. It is hooked directly to the battery. It has worked good for about 10 years. It...
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