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    What causes the clicking sound when an inverter arc welding machine is powered up and turned on/off?

    https://en.wikipedia.org/wiki/Welding_power_supply
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    CDI trigger circuit parts

    I have doubts that any of the existing ignition system would have been CDI. However, I have been involved one way or another with CDI systems for model engines for many years. The latest uses of-the-shelf items, much simpler, cheaper,quicker to get up and running and above all, works well...
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    Servo Waving!!

    Start learning basic Arduino programming. They are made for things like this. If you learn about promini or nano, small size and modular also. Even picaxe if you prefer.
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    mini itx

    How can anyone even guess if you do not supply any details of the device..??
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    can I charge 12.8-volt battery with a 15v charger

    Also need to regulate the charge current to suit the cell/cells and a cut off circuit when the cell/cells reach their max. i.e. 4.2v/cell Best/cheapest/safest is buy one that suits.
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    Forum Upgrade & Merging with Maker.pro

    Maker.pro crap too...
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    Forum Upgrade & Merging with Maker.pro

    difficult to follow...don't know why you have to muck around with something that works just for the sake of making it different. Have to log in every time and then find the active discussions. I say leave it the way it was.
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    Can someone please identify what this sensor (?) Could be?

    Looks very similar to the antennas used in 2.4g receivers with the ipex socket. https://www.ebay.com.au/itm/295133757553
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    USB 5V power filters or grounding my computer KVM to eliminate noise on audio introduced by keyboard

    Use co-ax shielded audio cable. Ground the shielding only at one end i.e. the source.
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    Why do some devices turn on with the mains before the "On" button is pressed?

    So don't buy them....you seem to be aware of it and yet persist in buying them, then complain of the outcome. Who knows how the designers of these things think.... good bet it's to do with being cheap though.....:rolleyes:
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    KL MMA160 inverter igbt arc welding machine does not weld although it gives an appropriate value of

    I count 5 diodes adjacent to eachother...think you'll find one would possibly be a zener. Without more detail, hard to say. Wouldn't expect to see 1N4148 as rectifiers there though.
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    Why do some devices turn on with the mains before the "On" button is pressed?

    Maybe it's only for turning off...did you read the instructions?
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    Trying to mount monitors Please Help

    Show photos so we can see........:confused:
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    Temporary Delay Circuit

    That is what everyone is saying....... Ever heard of cannot see the forrest for the trees or/ then the penny dropped...?? That drawing 2 looks problematic.....
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    Temporary Delay Circuit

    Not overdriving the output with the relay current (assume AUI is a relay) Perhaps a full circuit diagram with details would shed some light. Edit:- ah...ok see your load whatever it is, is the AIU, same request though.
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    Portable Power Station no AC port power

    Why not take it back to where you bought it then..???? Surely would have warranty of some kind unless it fell off the back of a truck.:)
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    Portable Power Station no AC port power

    Sounds like you have zero to no experience with electronics so apart from anything visual, probably upstream without a paddle. Actual model details and a few photos when/if you get the case open would be helpful to a small degree. Also how old the system is..... how often you use...
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    Temporary Delay Circuit

    http://www.talkingelectronics.com/te_interactive_index.html Look on the left side for the second book on transistors. Scroll down the main page and look for....... "delay turn off- turns off a circuit after a delay" Look at the 4th diagram under "time delay circuits"...... Note that the first 3...
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    Difficulty finding the appropriate resistor with power calculation

    No, meant the OP now saying they are using IR Leds..... cheers...:):)
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    Desparately seeking off button

    Rather dramatic :eek:.......Check your sounds, sounds in control panel.
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