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    Motion activated solenoid (wireless)

    Need to be more detailed in your requirements, such as what voltages, which photo is (1) and which is (2) ...they look like one large image to me with no sensor to speak of. If those 2 black rails are some sort of sensor, details there would be helpful. 2 relay modules seem to be just that...
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    I Need a Device that Can Tell a PC the State of Relay Contacts

    You already have a "device that can tell the on off state" and that would be a set of voltage free contacts on the relay. Instead, I'm guessing you need to interface somehow to a pc. Rather large open ended requirement due to just what program, software, whatever you are running on the pc that...
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    Old Car computer (ECM) may be faulty

    Thing is, that may help with what is visible in the photos but............ There is a mating receptacle which would be almost impossible to clean with that method and both are required for a connections.
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    Sanjeev Mansotra | What Does The Green Snake Mean on Your Apple Watch Series 8?

    Well, that may be but this says differently...........could be difference between green snake and green zig zag....... either way I wouldn't have one if you gave it to me anyhow....overpriced, over-rated POS. https://screenrant.com/green-snake-apple-watch-fix-how/#:~:text=Just like smartphones...
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    Sanjeev Mansotra | What Does The Green Snake Mean on Your Apple Watch Series 8?

    Google says, charge it....boy, that was a hard one. :rolleyes::rolleyes::rolleyes:
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    Whirlpool oven timer problem

    Don't mean to be picky but that looks like 8vdc to me....not 48vdc
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    Using a PIR to both turn on and turn off LEDs

    Probably operate on/off if one moves a leg, wacks a mosquito, dog scratches a flea or a gazillion other things also.
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    Using a PIR to both turn on and turn off LEDs

    Application needs a lot more thought on the operation. Too many if's or but's. All in all it raises more questions than answers.
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    Whirlpool oven timer problem

    Is that in relation to what was cooking in the oven or to some suspect electrical component. Almost 99% of oven problems are related to the oven heater element be it burnt out or the spade terminal connections being bad. Very seldom will a timer die especially with no physical signs.(so far at...
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    Marathon Electric Motor Question

    This is the part where a picture/drawing is worth a thousand words....especially this part....."continuity to one of the leads to the 4uf and each other". When you say continuity , does that mean 0 ohms or some other reading. Draw a circuit would be best. Below is what one would expect to see...
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    Timed Relay query

    Didn't read post #5 I take it.
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    Boardgame wiring question......

    Stay off the turps.
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    Samsung HT-E8200 Power Supply

    Switcher ic and circuit appear to at fault with zero volts. The ic themselves work pretty hard and do fail. As to just where, you need to look/test further.
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    Modern Day Use for Old Electronics vs New Electronics. Is it Realistic & Practical?

    Fine, do it your way...no skin off my nose. You asked, I told you...... first lesson, don't knock it until you've tried it. Seems you know everything anyhow.
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    How to disable DT9205A auto power off?

    Try EasyEda. Once applied as a schematic, one can generate a pcb and even have it made if that takes your fancy.
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    Modern Day Use for Old Electronics vs New Electronics. Is it Realistic & Practical?

    Move on...forget using the old stuff but remember how to apply it. Invest your time in learning microcontrollers and programming like Arduino. You'll find the interest will spark and you'll have plenty to learn about and apply to more than you first imagine. And it's not all that...
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    Q954 unable to find data sheet

    No, not a capacitor. More likely a diac.
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    Circuit for switching speaker and LED

    As shown seems ok depending on just what the LED is (current/voltage)...... BUT......... what happens to the amplifier with an open circuit on the speaker. Some amps will poke out smoke when this happens.
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    Can't Identify Components in Old Guitar Amplifier

    Think you are correct.......either way, possibly still ok so as before, leave well alone. https://hackaday.com/2020/01/13/why-do-resistors-have-a-color-code/
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    How to disable DT9205A auto power off?

    Could make suggestion to bridge out c/e of the pnp high side transistor but....is it Q2 or Q3...supplied schematics are different.
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