My objective is driving the gate of an N channel Mosfet with the 555 timer in monostable multivibrator.
I've completed the 555 circuit and it gives me my desired pulse just fine, but when the 555 output is connected to the gate of the mosfet, the mosfet turns on without ever triggering the 555 to pulse...
The mosfet configuration is
S: Ground
D: Light
G: 555
and here is my circuit.
Additional data: During all of my test's i am using my DMM with Neg lead to drain and Pos lead to Pos bus.
The mosfet is in working order, it switches fine in any test configuration.
And yes, I will put a diode across the light, once I've corrected this problem.
thanks in advance to anyone who can help
-Steve
I've completed the 555 circuit and it gives me my desired pulse just fine, but when the 555 output is connected to the gate of the mosfet, the mosfet turns on without ever triggering the 555 to pulse...
The mosfet configuration is
S: Ground
D: Light
G: 555
and here is my circuit.
Additional data: During all of my test's i am using my DMM with Neg lead to drain and Pos lead to Pos bus.
The mosfet is in working order, it switches fine in any test configuration.
And yes, I will put a diode across the light, once I've corrected this problem.
thanks in advance to anyone who can help
-Steve
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