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  1. B

    Battery resurrection

    Battery university advice best followed. Once they're knackered, that's it forever.
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    What is causing this voltage spike?

    Sounds like the original zeners are kaput. Your measurements appear to be incorrectly done. Suggest replacing what was already there.
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    What is causing this voltage spike?

    What happens if you put the original board back in circuit. No idea why you seem to need to go to 18V. The voltage you see is simply open circuit voltage and should not take much effort to get it under control.
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    What is causing this voltage spike?

    Best you provide a circuit diagram. I suspect the previous original setup had some load attached and kept the voltage at a required level. Not uncommon for open circuit coils such as this to go to rather high voltages unloaded. Early ('60-70's) motorcyles had a rather large zener attached to...
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    555 LED Circuit not playing nicely

    Rather strange to show that when the battery is already shown. As is, it infers there is more to the circuit than shown.
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    Help identifying this

    Most likely an inrush current limiter.
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    Marantz PM6004 amplifier cutting out at low volume

    Normally it's to stop or reduce the large "pop" through the speakers, nothing to do with relays.
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    555 LED Circuit not playing nicely

    so what is that exactly...??? What is Bat 1- ....???
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    555 LED Circuit not playing nicely

    pin 4 to pos rail......
  10. B

    Automotive related question regarding specificity of diode.

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    24V 5A 3-state capacitive touch switch (not a dimmer, without relay)

    Switching part easy enough with an Arduino and a cap sensor and some code. Don't know about the "without a relay" part. One can get relays with low coil current for battery operation. Almost essential when mixing the switching between audio and power circuits. Off the shelf I very much...
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    Can someone help me with this

    Usually one would suspect the resistor however, it looks quite normal. Then again the underside may be a different story. (possibly blown) That would then leave the 3 terminal device, which, without any detail, impossible to say what it is. Wondering what happened to the (looks like) missing...
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    Automotive related question regarding specificity of diode.

    Look for a bad earth somewhere, likely cause of what you describe.
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    Can I get this scale to work again?

    Sounds like you successfully removed the conductive surface ( required) from the buttons.
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    LCD TV power supply amperage

    You give no indication of make model or any detail to go by however, I seriously doubt TV manufacturer would include any power supply capable of any aux power output, let alone 6 to 10A for any LED strip.
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    Can I get this scale to work again?

    With the amount of speckily rust/corrosion deposits around inside the case and on some of the screw heads, likely a corroded connection on the LCD.
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    Need help in ECG circuit and arduino code to read BPM

    Fritzing are a right pia at the best of times....yours is so small cannot make out and connection details....
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    How to trigger relay with RF

    Cost around $10 off the shelf any online shop. Tx, Rx relay, all done, the works.
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    Windows Key Is Not Working Properly, what to do?

    Post is 1.5 years old...doubt anyone listening.
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    Replacement LCD needed

    Try a search for the component using make model type of product....... likely it's oem, not a mulitfit item off the shelf.
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