| Electronics > Beginners |
| Proper MOSFET driver for 30N06L |
| << < (3/3) |
| jonroger:
I would look into a different mosfet - one that is fully on at 3.3V. |
| james_s:
If you want "absolutely everything" you'll want to go get yourself a stack of textbooks. These should get you started though: https://www.electronicshub.org/transistor-as-a-switch/ https://jeelabs.org/2012/11/12/high-side-switching/ |
| help_me_pick_username:
--- Quote from: aheid on November 26, 2019, 03:30:25 am ---You can build the circuit without the ESP, and test it by connecting the lead that would be going to the ESP to GND or 3.3V / 5V to emulate the GPIO pin being high or low. Double check connections before powering up. Once you have verified it works it should be safe to connect the ESP. --- End quote --- I built your circuit and tested it, and it works! Thank you. I have attached a picture of my schematic at the moment. One change I made, I connected the MOSFET pull-up resistor to 12v instead of 18v VCC, since that leads to about 10v on the pin, which is enough to fully saturate the MOSFET (I think), and leads less heat dissipation when BJT is active. I have not tested the circuit with the ESP yet. |
| james_s:
In the future you can make a schematic a lot more readable by moving things around a little. For example place R2 vertically and connect it directly to the voltage rail instead of having it loop around like that. |
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