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    Calculating Resistor Value for Video Doorbell / Home Intercom Mashup

    I'd say your ring video door bell is not what you think it is. Instead of providing what you think is the answer/problem, show us all the detail you had to work with from scratch.
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    Needing timed spark (Noob)

    4 or 5 what..??
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    Power Recliner controller

    24v ac * 1.414 - 2 (actual diode v drop) approx = 32v dc
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    Power Recliner controller

    Doesn't sound right.....
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    Ammeter Span adjustment

    My car won't go...can you tell me how much to fix it and where I can get the parts.?? See the problem here.......no where near enough information, links, photos, model numbers etc. etc.
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    JVC GR-C7U is having issues accepting NiCad batteries and charger, though the camcorder can turn on.

    According to this....... https://www.batterygiant.com/camera-battery/JVC/GR-C7U/BNH-110-2 the battery is supposed to be a 9,6v NiMh.
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    HC05N

    Could be any number of things, that's why davenn asked for more info.
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    Blown fuse ? power brick psu

    Something seriously wrong with it to blow a fuse to extreme like that. New unit about AU$20.00 on Ebay. Board says F1. (fuse)
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    Generator output waveform check with cheap o-scope

    Cannot read the label....
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    Bypassing Treadmill safety switch

    5V, S and G tends to say hall effect switch.
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    Generator output waveform check with cheap o-scope

    You will find if it is an older style generator from the 80's or further back it will be sine wave output. Newer inverter style will actually tell you if it is pure sine wave output, sadly though, if no such notice, it a rough old chopper. Using a $2 meter and changing things to get what you...
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    Hitachi KH-1190E radio stopped working

    What are you using to test components..? I found the little component tester off Ebay etc. for around $30.00 to be invaluable especially with a range of different components.
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    What wire do I need

    Depends which country you are in as for example in Australia, requirement for cable to be run inside underground conduit and 450v/750v rated(amongst a raft of other requirements)
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    Generator output waveform check with cheap o-scope

    Gererator outputs normally float. i.e. no ground reference.
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    N64 game repair

    mmm...can see corrosion in other parts as well. FYI...just bought a game unit from Bgood for the wifes niece and nephew for just under AU$30...has 620 games built it...
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    Stereo CD reader issue (Kenwood KDC-252u)

    Some readers have problem reading pc burned discs. Have to tried an original shop bought disc..?
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    Please help me what is this sign means

    Looks like Pi
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    Hitachi KH-1190E radio stopped working

    Haven't recently plugged an earphone in at all...??
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    Replace IC 4049

    I don't get what the two driver transistors 2n2907 are supposed to do....no base resistance.....no mosfet gate pull down resistance. Possibly one mosfet still conducting when the other turns on.
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    Resistor to discharge capacitor

    A neon is not going to be much use as an indicator as they require somewhere in the vicinity of 70 -90v to turn on. The resistor I quoted works fine, simply leave it in circuit for maybe 10 seconds. You will feel it get warm on the larger caps as it does it's job. If in doubt, check with a...
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