Recent content by Henrik B

Got the components I ordered yesterday and mounted new MOSFETS in Q1 and Q2, installed a new ATMega, assambled the boards and started it up. To the moment of truth connected the fan, changed to manual mode and finally there is controlled air flow from the fan. Now I just need to make an adapter...

Got the BS170 out from Q2, measured both the Q1 and the Q2 with my multimeter giving different results, what should it read? Oh well solderd the Q2 MOSFET in the Q1 position, assembled the boards, powered up, hooked up fan... I give up! Full speed at 0% #*£*?!?!$€% OK obviously that coponent...

No continuity between center and gnd or left and gnd. Fan is not running with Q1 removed. The engineer in me, tells me this points to component error and not a short on the board. However as I'm chemical engineer and not electronics, my conclusions in this are not alwasys worth that mouch...

I measured against ground, should I have measured against pin5 on the ATMega?

Thanks Ralph for all the support, I hope you can keep guiding me to find the solution to my problem. It's not fixed yet. Removed the BS170 in Q1 and measured the holes, left reads 12.2V at 0 and 100%, center and ground both read 0V at both 0 and 100%. Measured 3.3V on the RPi so the 3.3V...

Yes fan speed is set to 0 and 100 manually. I was also considering the idea that either Q1 or Q3 is damaged in som way. Unfortunately I don't have any extra lying arround so I will have to order them online. What would happen if I switch Q1 with either Q2 or Q5? How would I know doing this that...

Pit temp has been set close to ambient, but I run the fan manually so the pit temp shouldnt impact the fan. However it runs at 100% regardless if the pit temp i set above or below the temp the prove reads.

I also find this difficult, looked through a lot of threads yesterday and still no clue! Got a brand new ATMega and re-wrote the SD card with a newly downloaded imsge, but with the same disapoibting result, so I agree thet the ATMegas is not the problem. Cheched the blower wiering, black has...

The sittings are set to above 0%, min 0%, max 100%, start up max 100%, fan is still running contineously at 100%. Where do I re-flash the ATMega? I have tried the AVR firmware through the WebGUI, tested all online 4.x versions available with no change. I kept the fan connected while flashing the...

Troubleshooting - Fan running at 100% Finished my first HM build, v.4.3. Not having soldered for over 20 years, I'm very happy with the result! Installation and booting up and accessing webGUI via my rPi3 works great, thermocouple and temp probes are all working, however the fan is running at...