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  1. TenderTendon

    Microcontroller controlled by pushbutton for LED flashlight

    I was initially looking at SOT-323 packages. If I bump up to SOT-23, I can get away with just one. Looks like this one would do the job: http://www.vishay.com/docs/63302/si2342ds.pdf
  2. TenderTendon

    Microcontroller controlled by pushbutton for LED flashlight

    I chose 2 MOSFETs, as I couldn't find a single that would handle that much current alone. Maybe I didn't look hard enough. I planned on 2 in parallel. I plan on making a couple prototypes by hand, then farming out the rest. Probably 100 or so. Power sources will be Li-Ion, NiMH and alkaline...
  3. TenderTendon

    Microcontroller controlled by pushbutton for LED flashlight

    Hello, I want to make an electronic switch that will handle 5a dc, at no more than 5v. It will be controlled by a miniature tactile dome momentary switch. Operation is as follows: I want the output to be momentary if the switch is pressed for <500ms, mantained if pressed for >500ms. I was...
  4. TenderTendon

    Kenwood KR-8050. A+B Speaker selection not working.

    Thank you. All consumer amplifiers operate in this way, as putting 2 sets of speakers in parallel could easily put too much load on the output section, causing overheating and shutdowns. I have a feeling that nothing was ever wrong with that receiver and the time spent was a lesson learned...
  5. TenderTendon

    Kenwood KR-8050. A+B Speaker selection not working.

    Are you testing the A+B switch position with speakers connected to A an B at the same time? In the A+B position, speakers A and B are wired in series, so both must have speakers connected to work. You can't test one at a time.
  6. TenderTendon

    Olympus Keymed KS-2 ultrasonic cleaner

    Well, I re-assembled the transducer with a new cap screw and it's working like new again. I can't wait to see what happens next....
  7. TenderTendon

    Olympus Keymed KS-2 ultrasonic cleaner

    This has been my workhorse for many years. I use it almost every day and really rely on it. Recently it has been giving me nothing but headaches. I'm about to give up on it. A couple months ago, I noticed the tank agitation drop to almost nothing. Tore it apart and found one transducer broke...
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