Hello
I am trying to get a mosfet to drive a DC heating pad. The pad is essentially just a resistor of about 10 ohms and I want to switch 9V to it. I am using a Stp36nf06l Mosfet and the circuit is attached - it couldn't be much simpler. I want to turn on the mosfet with a remote control unit, the R06A, which is also simple: when the rx unit is on, the output goes high to 5V. That bit works fine, so long as the output is not connected to the mosfet.
For some reason, the output won't turn the mosfet on. The current through the heating pad, which should be about 1A, fluctuates round about 0.15A. The voltage on the gate fluctuates round about 0.6V. I suspect that actually the rx output is going on and off rapidly - too fast for my meter to register. The voltage from the battery doesn't drop noticeably.
The version of the R06A I am using has the "momentary" chip, so the output remains high so long as the button is pressed. Oddly, if I use the toggle version of the R06A it all works fine, which is pretty baffling (to me)
I can get the momentary R06A to switch on a reed relay (with a transistor) and use the relay to turn on the mosfet but that seems a pretty silly way of doing things.
Any ideas, please?
I am trying to get a mosfet to drive a DC heating pad. The pad is essentially just a resistor of about 10 ohms and I want to switch 9V to it. I am using a Stp36nf06l Mosfet and the circuit is attached - it couldn't be much simpler. I want to turn on the mosfet with a remote control unit, the R06A, which is also simple: when the rx unit is on, the output goes high to 5V. That bit works fine, so long as the output is not connected to the mosfet.
For some reason, the output won't turn the mosfet on. The current through the heating pad, which should be about 1A, fluctuates round about 0.15A. The voltage on the gate fluctuates round about 0.6V. I suspect that actually the rx output is going on and off rapidly - too fast for my meter to register. The voltage from the battery doesn't drop noticeably.
The version of the R06A I am using has the "momentary" chip, so the output remains high so long as the button is pressed. Oddly, if I use the toggle version of the R06A it all works fine, which is pretty baffling (to me)
I can get the momentary R06A to switch on a reed relay (with a transistor) and use the relay to turn on the mosfet but that seems a pretty silly way of doing things.
Any ideas, please?
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