157Views2Replies

Author Options:

HOW T0 TURN AUTO TURN OFF AN EE FLASHLIGHT Answered

The FET gate gets charged and lights the LED until R2C falls below 66%

Discussions

0
None
Toga_Dan

8 months ago

Looks like a winner.

0
None
iceng

8 months ago

The MOSFET Gate gets charged and lights the LED until R2C_seconds discharge falls below 66%...
Pick the FET that works the current needed, (2N7000 - 100ma) or (BS170 - 500ma) and adjust the R1 value appropriately.