Recent content by ivak245

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    12 volt relay's behaving strange

    I have had automotive relays which don't follow the standard terminal arrangement, but still plug into a standard relay socket.
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    tiny 12v fan for my miniature models to exhaust humidifier vapor/misthi

    What voltage is marked on the fan and what voltage are you using? The ad mentions 5-12v, but they are usually a fixed input voltage.
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    Question regarding creating a boost circuit, 24 to 200V for a solenoid

    Can you use a 24 volt solenoid?
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    Inside My Electronics Lab: Where Ideas Turn Into Circuits

    If you add a couple of mis-pronounced words and bad timing, I'd say you were spot-on.
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    Diagnosing my failed CNC controller

    The bottom picture is a standard SM power supply. Have you measured the output? (with the load disconnected).
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    Peerless instruments DT5 A

    Try 2N 3082. This comes up as an NPN transistor.
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    Electronics seems like magic!

    I wonder if you could use MIG or TIG? Must try it next time I build something. I can always grind off the bad welds with an angle grinder.
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    Electronics seems like magic!

    A soldering iron does not work if you don't know how to solder. Acetylene torches are great for electronics, especially SMD devices.
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    Burnt component on module

    You should be able to see the relay operate through the clear housing & can usually feel the relay click.
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    I need a really good inline connector

    You can use neutral cure silicon, it has no acetic acid. I have used it many times in commercial equipment.
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    PCB Component Removal

    If it's a stubborn one, wedge a small flat blade screwdriver under the cap, and a little twist while the solder is molten will pop one leg out of the hole. Don't go overboard with the heat, as you may separate the pad from the board.
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    Audio amp modification

    The new amp was donated to our organization to replace the dead one, I had bench tested it with the speakers supplied, and it worked well. I suspected that it might not be that easy to "combine" the outputs. Thanks for the info.
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    Audio amp modification

    They are standard 2 wire speakers with internal crossovers as I installed them many years ago. They are still working with a standard 2 channel output amp. I am replacing the existing stereo amp ( 1 L & 1 R channel output) with an amp that has 4 outputs - 2 high/mid frequency (L&R) and 2 low...
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    Audio amp modification

    RHS of the circuit diagram . They come out of IC 500 &501 as "high channel speaker" and "low channel speaker". So IC500 is doing the "high" amplification (midrange/tweeter), and 501 does the woofer.
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    Audio amp modification

    I want to drive a pair of speakers which have internal crossovers with an amp which has separate woofer/ mid and tweeter amps, as shown in the circuit. The existing speakers are fitted high up in a building, and have the standard pair of wires going to them. I can't get to them to separate...
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