Tagged Questions
3
votes
1answer
188 views
Criteria behind selecting pwm frequency for speed control of a dc motor?
I'm working on a speed control circuit for a brushed dc motor (24v, 500rpm, 2A, 4kgcm).
The main components that I plan to use are PIC16f873, 4n25 optocoupler, IRFZ44N MOSFET, BY 500 - 800 diode(for ...
1
vote
1answer
108 views
How to switch between a solar panel and battery?
A 12v battery is being charged from a solar panel. When battery is 12v solar panel is disconnected from battery and connect the load with battery. And again solar panel is connected with battery when ...
0
votes
0answers
97 views
Controlling USB Power with External Voltage Source
I was trying to figure out a way to add a switch to the USB +5V wire, that could be controlled with another voltage source. I was thinking about using an optocoupler + mosfet to do it.
More ...
2
votes
2answers
305 views
Isolated MOSFET output stage calculations
I am a newcomer in this wonderful world of electronics trying to design my own PLC.
So far I have designed a single output stage that I think will work, but it would be great if i could have any of ...
2
votes
1answer
696 views
Power MOSFETs and Gate drivers
I'm trying to finally apply what I learned at university in the course of power electronics.
However I find that both that course and most of the books / online references are lacking on some points.
...
8
votes
3answers
10k views
How to drive a MOSFET with an optocoupler?
What's the proper schematic for driving this MOSFET from a microcontroller pin through this or this optocoupler?
The MOSFET will drive a motor @ 24V, 6A.
