modified 9 years ago

Regulator For Stable DC 12V

02:29:55

Perfect...!!! ;)

published 11 years ago

rbrtkurtz

11 years ago

A few things... There's a voltage drop from base to emitter of about 0.6V - 0.8V, so you'll want to account for that when selecting the Zener diode. 12.7V at the base will give you your 12V output. This is why right now, you have 12V at the base, and 11.3V at the emitter (output). Next, you usually want about 15-20 mA going through the Zener. Set that with the resistor for it to operate properly. There is no sense in having it dissipate more power than it needs to do it's job. Anyhow, try a 12.7V Zener, a 500-600 ohm resistor, and see how that output looks. ;)

CahMbhelink9

11 years ago

rbrtkurtz

11 years ago

Be careful with that input voltage though. Now at 50V the transistor, resistor, and diode are all having to dissipate a lot of power. You were better off at 24V.

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