Hi All,
New to the forum, used the search utility prior to posting this and didn't find anything similar on the first couple of pages so here is my question.
I have a couple of FETs lying around and I wanted to get a rough idea for what their properties are (Vtr, K). Therefore I'm supplying 12V to both the gate and drain with a LED and resistor coming out of the source. What I've found is that id is not a constant current. The led coming connected to the source blinks continuously and the current is impossible to measure as it is constant jumping. I thought this could be a problem with the power source however when wiring up an LED and resistor the LED remains on constantly. Tried both the FETs I have with identical results and also tried with different resistors. Has anyone experienced this before? What could be causing this?
Pictures are attached:
New to the forum, used the search utility prior to posting this and didn't find anything similar on the first couple of pages so here is my question.
I have a couple of FETs lying around and I wanted to get a rough idea for what their properties are (Vtr, K). Therefore I'm supplying 12V to both the gate and drain with a LED and resistor coming out of the source. What I've found is that id is not a constant current. The led coming connected to the source blinks continuously and the current is impossible to measure as it is constant jumping. I thought this could be a problem with the power source however when wiring up an LED and resistor the LED remains on constantly. Tried both the FETs I have with identical results and also tried with different resistors. Has anyone experienced this before? What could be causing this?
Pictures are attached:
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