Hi all, first time poster here!
I've searched online for temperature fan controller and i came up with the schematic in the attachement.
It's based on a LM311 and it seemed a pretty straight forward circuit. I already got the parts and built it in my test board, but it won't turn on the relay no matter what temperature is on the thermistor or what position the potenciometer is.
Strange thing is that if i disconnect pin nº4 (which was connected to ground along with pin nº1) the circuit works exactly as it should.
This is great but it bothers me why it didn't work according to the given schematics.
Anyone kind enough to give a light?
Thanks in advance
I've searched online for temperature fan controller and i came up with the schematic in the attachement.
It's based on a LM311 and it seemed a pretty straight forward circuit. I already got the parts and built it in my test board, but it won't turn on the relay no matter what temperature is on the thermistor or what position the potenciometer is.
Strange thing is that if i disconnect pin nº4 (which was connected to ground along with pin nº1) the circuit works exactly as it should.
This is great but it bothers me why it didn't work according to the given schematics.
Anyone kind enough to give a light?
Thanks in advance