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  1. advarp attached a file to the thread Trickle charge for 4.5V LED fairy lights or 3xLED candles (parallel) - normally using 3xAAA.

    Thanks for that, this is to feed the circuit separately but I woudl like to trickle charge the backup batteries at the same time with...

    i2.png Jan 16, 2018 at 6:12 AM
  2. bertus replied to the thread Nixie Power Supply (DC-DC) inductor problem.

    Hello, As for the diode, the following project uses the BAV21, UF4004, UF4007, MUR140, or MUR160 diodes:...

    Jan 16, 2018 at 6:11 AM
  3. DickCappels replied to the thread Power transformer with interleaved winding.

    Just wind it as I think you described. Divide each winding into layers and interleave the layers, as you said. It is fine if one winding...

    Jan 16, 2018 at 6:09 AM
  4. smooth_jamie replied to the thread Who are you?.

    Hi All, I'm smooth_jamie. I got my BEng (Hons) in electrical engineering in 2013, and now I'm an electrical engineer working in...

    Jan 16, 2018 at 6:02 AM
  5. AlbertHall replied to the thread Nixie Power Supply (DC-DC) inductor problem.

    Maybe that track could go clockwise round the board back to C4?

    Jan 16, 2018 at 5:53 AM
  6. smooth_jamie replied to the thread Old 1990's PS/2 keyboard and conductive glue fix help ?.

    OK. I can appreciate why you are attempting to repair it, but can't you source a spare keyboard (even for a laptop this old)?. I'm still...

    Jan 16, 2018 at 5:42 AM
  7. silkyre6xtenz posted a new thread.

    Power transformer with interleaved winding

    [ATTACH] Hello guys, i know that windings interleaving allows to reduce flux leakage and increase efficiency of a transformer. It is...

    interleaving AAC question.GIF

    Forum: Power Electronics

    Jan 16, 2018 at 5:31 AM
  8. WylieZA liked ericgibbs's post in the thread Convert 12V/24V logic signal to 5V.

    hi W, Look at this simple LTSpice sim, the Vout max is approx 5V E

    A001.gif Jan 16, 2018 at 5:25 AM
  9. smooth_jamie replied to the thread Help and how people see it..

    Hi Guys, I'm new on this forum and I joined so I can learn as well as share some of what I've learnt. I hope what I've posted so far...

    Jan 16, 2018 at 5:23 AM
  10. WylieZA liked LesJones's post in the thread Convert 12V/24V logic signal to 5V.

    You could use a potential divider with a 4.7 of 5.1 volt zener diode in parallel with the lower resistor. The values of resistors for...

    Jan 16, 2018 at 5:23 AM
  11. WylieZA liked LesJones's post in the thread Convert 12V/24V logic signal to 5V.

    You are correct that if the emitter was at +6 volts when the bas was at zero then this could destroy the transistor. Also if you...

    Jan 16, 2018 at 5:23 AM
  12. be80be liked bertus's post in the thread Help and how people see it..

    Hello, The help can be different for many users. Have a look at these old thread where I helped a member that has concentration...

    Jan 16, 2018 at 5:23 AM
  13. be80be liked ericgibbs's post in the thread Help and how people see it..

    hi be80, I often see Threads of interest, where others are posting good solutions to the TS's query. I try very hard not to jump into a...

    Jan 16, 2018 at 5:22 AM
  14. 123445 replied to the thread Old 1990's PS/2 keyboard and conductive glue fix help ?.

    "uploading your photographs direct to the forum" (RESIZED IMAGE AS A ATTACHMENT BELOW POST) ;) "with advertising banners and popups"...

    Jan 16, 2018 at 5:17 AM
  15. LesJones replied to the thread Convert 12V/24V logic signal to 5V.

    You are correct that if the emitter was at +6 volts when the bas was at zero then this could destroy the transistor. Also if you...

    Jan 16, 2018 at 5:16 AM
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