without resorting to an IC or an MCU.. or even a unijunction.. how would you make a standard 3 pin turn on.. for example using an ldr or a voltage divider... as the voltage rises on the base c/e start conducting... is there a way via discrete components to only trigger off digitally.. now it's on …

make a transistor "snap on"

MarkT October 8, 2015, 6:24pm 8

Anyway back to the topic, the answer is positive feedback.

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