10
votes
3answers
750 views

What is a popular cheap and robust substitute for 2n7000 MOSFET for use with 3.3 Volt designs?

First off, this is not a shopping question, it is an attempt to harvest the knowledge of all the EEs who may have crossed the same bridge the question describes. Question: What are the popular ...
7
votes
4answers
2k views

How do I eliminate PWM noise when driving a fan?

I'm driving a 12V 0.11A brushless DC fan with PWM using an MSP430Gxxxx --> TC427CPA FET driver --> BS170 N-FET. The fan is on the low side of the FET. Even with a duty cycle of 90% and a frequency of ...