Hi Nigel. My impressions from trawling around is that the 1-2ma current will have a problem driving a FET.
Also, I can only supply a bias voltage of 3.3V, which may be too low for FETs.
Is that an incorrect assumption ?
EDIT :- Just realized there are logic-level MOSFETs. Would you advise on the suitability of a BJT or MOSFET for driving 100ma approx. ?
I also realized that a MOSFET does not need a bias resistor at these low currents.
Hi Nigel. My impressions from trawling around is that the 1-2ma current will have a problem driving a FET.
Also, I can only supply a bias voltage of 3.3V, which may be too low for FETs.
I rarely use FET's, but it depends on the type you use - personally I'd just use a bipolar transistor, and either one or two ressitors (depending how low the 3.3V goes).