Roff Well-Known Member Oct 12, 2004 #21 If you want to use k7elp60's circuit, change the 620 ohm resistor to 1k. The 620 ohm resistor biases the base at about 660mv - too low to allow the transistor to saturate.
If you want to use k7elp60's circuit, change the 620 ohm resistor to 1k. The 620 ohm resistor biases the base at about 660mv - too low to allow the transistor to saturate.
Roff Well-Known Member Oct 12, 2004 #23 quanta said: thnx a lot ron Click to expand... You're welcome. I should warn you that the LED in my circuit will draw about 20ma. If you want about 10ma, change the 1k series resistor to 2k.
quanta said: thnx a lot ron Click to expand... You're welcome. I should warn you that the LED in my circuit will draw about 20ma. If you want about 10ma, change the 1k series resistor to 2k.