I forgot to draw the led resistor...
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Is there a particular reason for using a MOSFET in this application rather
than a jellybean NPN transistor? Small signal MOSFETs are fragile things
anyway, and exposing them to the set up you have with separate boards just
seems like an inherently troublesome approach.
Jon.
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I used these MOSFETs because I found them in several schematics dimming RGB
LEDs using PWM.
I’m trying now with a BC548 with a 4.7K resistor between the base and the
pwm controller pin. It works great. So, bye bye 2n7000, welcome BC548 :-)
Thanks a lot for your input!
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Actual list:
3LO1I – 72 pcs. for $15,
6LO1I – 104 pcs.,
6LO2A – 4 pcs.
7LO55I – 1 pc.
8LO29I – 47 pcs. for $20,
8LO30I – 1 pc. for $100,
8LO39V – 22 pcs. for $20,
13LМ31V – 7 pcs.,
13LN2 – 1 pc.
13LO9I – 5 pcs.
13LO18V – 1 pc.,
13LO36V – 1 pc.,
13LO37I – 2 pc.,
16LO2V – 29 pc.,
16LO2
I've used many MOSFETS in my clocks, with zero problems. In my opinion, the
main nixie-ish advantage of a MOS device versus bipolar ( NPN or PNP) is
that the MOS device requires essentially zero power to keep the device on,
whereas bipolar devices require a small amount of base-current, typical