Roff
Well-Known Member
Yeah, I had a brain fart. The base-emitter resistor should be 10k, not 1k. I like base-emtter resistors where the signal might be noisy, or the input pull-down is unknown.The resistor divider on the NPN's gate lowers the 4.6 volts bellow 500mv, the base junction never becomes forward biased. If you skip the 10k and 1k resistor divider on the base and just use a 1k resistor to the base it works fine. What's the resistor divider for?
I'll edit my schematic when I get downstairs to my other computer.