farhada
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diagram nokia charger
May I aske you a question, how do you connect the "command from the IC"?
Because the TRIAC will not work if you do not send a pulse to "open-up"
One good example can be found on:
You can have a much better using one of the other suggestions, and use a high power zener diode to get what you are looking for.
One important issue is to make sure you have a surge protecting device (like a transzorb) somewhere in your design, if not, any surge on your power will fry your device which will be much more costly than the amount you are saving by not having a transformer.
BR,
/Farhad
jayxflash said:I have this schematic diagram, I made it practically and is not working. I do not understand why, the circuit suposed to work with the sch, requests about 30mA, but the schematics offer only 3V. 7 days past and I don't know what to do... please give me some tips, or links to another schemes that work with no transformer to obtain 5vdc.
thanks!
May I aske you a question, how do you connect the "command from the IC"?
Because the TRIAC will not work if you do not send a pulse to "open-up"
One good example can be found on:
You can have a much better using one of the other suggestions, and use a high power zener diode to get what you are looking for.
One important issue is to make sure you have a surge protecting device (like a transzorb) somewhere in your design, if not, any surge on your power will fry your device which will be much more costly than the amount you are saving by not having a transformer.
BR,
/Farhad