Electronics > Beginners
Best choice oscillator for low powerdraw, low component count, ca 1-5kHz
<< < (4/4)
Kleinstein:
A very simple oscillator with schmidt-trigger  (like 1/6 of 74HC14 or  74HC1G14) and resistor and capacitor. It is a little similar to the OP with RC circuit, just the positive FB part already included in the chip.  The supply current tends to be not extremely low as the chips are quite fast and need more current when near transition, but it's probably OK (e.g. some 20 µA).  So maybe a little less than the CMOS555 version.

Besides a separate oscillator and boost circuit, there is also the option to use an LC oscillator with inductor taps / combination with a transformer.
Such circuits are known as Joule-thieves - they are kind of fun for the beginning. It does not have to be rectangle. Hard switching in just usually the higher efficiency.

Having up to 200 mA available does not sound like one needs really low power. This is more like something for a normal SMPS chip for the 5 V and some kind of added charge pump/voltage doubler utilizing the SMPS clock for the 14 V.
Navigation
Message Index
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod