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  1. B

    Wireless switch / outlet ~ RIP

    No idea what the 5T is but the 1N xxxx number means what it means.
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    Need to build a simple PWM generator

    Yes, well I was thinking more in the lines of this but anyhow...
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    Wireless switch / outlet ~ RIP

    According to data sheets that would be 24v and 1W. https://datasheetspdf.com/pdf/515451/FairchildSemiconductor/IN4749A/1 These little component testers are invaluable at times...
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    Need to build a simple PWM generator

    As with any micro, they mostly operate at 5v or less and the voltage in an auto can go to at least 14.8v and it's a noisy environment. Best to use a small buck converter and set down to 5v output and feed the Arduino through the Vcc pin rather than the RAW or Vin. Nice wheels. Had a '65 4 door...
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    Wireless switch / outlet ~ RIP

    Z1 would be a zener diode and test same as standard diode in-so-far as dodgy or not. Further testing as far as voltage would require either a component tester off Ebay for example, or build yourself a zener diode tester (relatively simple to do). Your looks to be physically broken though...
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    Supercapacitors anyone?

    1 down....about a dozen or more circuit unknowns to come........
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    Supercapacitors anyone?

    @ 3A.....
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    Need to build a simple PWM generator

    Simple enough with Arduino. Could use a promini (AU$4.00) or just the chip itself if you want it smaller. https://create.arduino.cc/projecthub/muhammad-aqib/arduino-pwm-tutorial-ae9d71
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    Need to build a simple PWM generator

    Litterally heaps of pwm modules on Ebay and the like, save building completely from scratch. One could easily modify one of these to get your range requirements. or, if you like to tinker, could be done via Arduino if you are that way inclined. Example...
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    How to debug this sound COB circuit?

    Would require an analog meter or digital set to "diode" would it not..?
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    How to debug this sound COB circuit?

    These are similar from Ebay....might get you started.
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    fixing Led lamp power supply

    Ed wanted 5&6 to 7 and or 4 ......the dot is usually pin 1 so you've given 1 to 5 and 8 to 5. Couldn't see any data sheet on TA3720 so cannot be certain.
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    Supercapacitors anyone?

    Used to be common on starter lead at the start solenoid lug, mainly from heat. The starters in cars these days tend to be rather small motors with a large gearing so start current not so high. Although Op does not say WHAT CCA ( secret I assume), it may be sufficient to start and run the vehicle...
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    What Zener diode is this?

    Nothing comes up on Google. Any details on what and where it is from...?
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    Supercapacitors anyone?

    Your best alternative is, as I already stated, to get a battery that doesn't drop the voltage as much during cranking. The way this is achieved is a CCA batery to suit your vehicle and then some. Might be a good idea to get the starter and it's main cabling checked while you are at it. Starters...
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    Alt tester newby needs help plz

    I very much doubt that. Your diagram needs to be redrawn correctly.
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    Noise suppression problems attempting to to mate power amplifier with PC power supply.

    Never ever seen that exception.
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    Reduce LED Brightness

    Resistor is one way.......but LEDs are a DC device. Why you would need 24v in any case is beyond me as it means large power disipation in the resistors. Do you have a drawing of your circuit..?? Include as much info as you can.
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    Noise suppression problems attempting to to mate power amplifier with PC power supply.

    To add...the shield is normally required to be connected only at the source end.
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    Supercapacitors anyone?

    Perhaps think about getting a more appropriate CCA battery.
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