Okay, so im using an Scr that has its gate rated at 1 watt power dissipation and 4 amp max current. So, I have a 9 volt battery. The battery is attached to a diode, that drops ~.7 volts so I have 8.3 at a junction. One way has a 10k resistor back to ground. The other is a resistor attached to the gate of the Scr. So from what I figured, .75w ( to keep it lower than 1 watt) = 8.3 x I, so my I = .09 A. Then using that I figure that 8.3 V / .09 A = R and R = 100 ohms. It is not working so I'm stumped what I'm doing wrong. Any ideas? Please and Thanks so much guys. (and gals)