Circuit Project Electronic

Modify power supply computer 230W For 13.8V 20Amp
“Opened up a whole bunch of SMPS (around 12) from different manufacturers and carefully examined them. The worst power supply was a Chinese made brand which advertised a 250 watt rating together with 5 volts at 25 amps on the cover plate but on [...]

R.E.E.Robinson VK2ILV
7 Roland Ave. Wahroonga 2076
Sydney, N.S.W. AustraliaAn inverter power supply suitable for valve radios is described. This inverter uses a small single sided Printed Circuit Board (PCB). Use the overlay to position the components. Test all the resistors, diodes, transistors, and capacitors before using them. The transformer and Integrated Circuit (IC) are difficult to [...]

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This is circuit PWM Control Speed Motor 12V with IC TL494
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