Hello All.
The bottom diagram shows what were currently using. The profet is actually a mosfet. When we short out the contacts ( say a light bulb )the transistor turns the LED on which indicates continuity. We then turn the mosfet on to light up the light bulb. The current system runs on a 12v Dc supply. The top diagram is what we would like to do. The systems runs of a 9 volt battery. We have a DC to DC step up converter, 9 volts in - 30 volts out. Were a bit concerned that the 30 volts may go back up to the 9 volt supply line and damage the rest of the electronics. Would a blocking diode place at "X" help solve this problem??? Will the 30 volts pass through the transistor and blow the LED.
Thanking in advance....
The bottom diagram shows what were currently using. The profet is actually a mosfet. When we short out the contacts ( say a light bulb )the transistor turns the LED on which indicates continuity. We then turn the mosfet on to light up the light bulb. The current system runs on a 12v Dc supply. The top diagram is what we would like to do. The systems runs of a 9 volt battery. We have a DC to DC step up converter, 9 volts in - 30 volts out. Were a bit concerned that the 30 volts may go back up to the 9 volt supply line and damage the rest of the electronics. Would a blocking diode place at "X" help solve this problem??? Will the 30 volts pass through the transistor and blow the LED.
Thanking in advance....
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