I am trying to make a LED strip light controlled by wemos D1 mini with N-MOSFET. I have a working circuit but the led strip is not completely turned off when the wemos pin is low and I do not fully understand why.
Should I try to increase the pull down resistor value from 10k or is the circuit wrong?
I use IRLML2502 (specs) which can switch on 3.3V. Is it a good choice?
Another question is, is this going to sustain working let's say for 10h/daily without heatsink and frying?
Circuit note - 3.3V is the wemos pin.
simulate this circuit – Schematic created using CircuitLab
EDIT
Readings on the voltmeter says:
- ESP pin off state - 0.0V
- R2 off state - 4.5V
I see where the power is coming from. I removed the R2 and all is working now. Why would R2 be needed there? M1 is charged off immediately anyway.
When the R2 is in the circuit
LEDs in mosfet off state are clearly visibly illuminated in lighted up room. All pictures are same camera settings - a bit underexposed. (From left - powered off, mosfet off, full brightness)