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Guess I'd blown something up (one of the MOSFETs). I've tried new components 0 PWM - 0.08v 122 PWM - 5.85v 255 PWM - 11.25v At the blower end. Not sure if that's right, but at least the blower stops when I want it to.

So it should only be grounded through the blower?

Q3 is getting really hot. I've swapped it out for another FQU11P06TU but still the same. Also made sure that R14 is 2k2. Sorry for being a moron! ha

There's something awry. 7.3v with 0 written to PWM. 11.3V with 255. ETA - This is one with Q1, Q3 and R14. I'm clearly doing something wrong. 12.3v from the PSU. Will do more analysis after a nice cuppa! ETA...the schematic shows 2k2 resistor for R14...parts list shows 22k. Will check it out...

I believe I included Q1 and R14. I revisited it this morning. Realised that the source of Q1 wasn't grounded. And also added the code above to Setup. Now runs 255 PWM - 11.3V 122 PWM - 10.1V 0 PWM - 9.3V I added the feedback circuit in but it's reading 1023 all of the time. When I check my...

Hey all I wired up the first part of the blower circuit...I need to do it in chunks or I'll get lost. When the PWM (analogWrite) is 255, the blower isn't on. When the PWM (analogWrite) is 122, the blower moves slowly. When the PWM (analogWrite) is 0, the blower moves fast. I took my cheap DMM...

Awesome, technical, understandable responses. Thank you folks

Thank you Ralph. The inductor will be here tomorrow, so guess I can test it. Not really sure how the circuit works, but what's the worst that can happen?! :)

Thank you RalphTrimble. I'm based in the UK. And whilst Mouser UK stock the components, their delivery charge is ridiculous...

Hey folks I'm planning on rolling my own, personal Pit Controller. Looking to borrow some of the features from the HM project, as they are tried and tested. My main focus is software, and my understanding of electronics is low/nil. I guess I'm looking for some individual "branches" of the...

Hi all Software developer (C#) by trade (based in the UK), with no electronics experience (with some mechanical engineering thrown in). Just finishing my first UDS build...and looking to add some temperature measurement/logging. I have an ET732 but it's just not enough to satisfy my geekery...