Solution to problem for people with skr boards. PS_ON pin on skr 1.4t give "weak" power so i used simple npn transistor as switch between relay + and Signal in. Weak PS_ON from skr board is applied to npn transistor base. It work normal now. Thnx anyway. Lockby mnikola2 - General
Tested another 5v relay but now using arduino, it work perfect. So it was not problem with something like high inrush current of PS and cheap relay. It has something to do with SKR 1.4t board but im not sure what they hell. It gives normal reading from pwrdet: 5v,gnd,1.0(PS_ON around 3.3v) but more mistery is why after everything off, relay is still closed and not returned to position.by mnikola2 - General
Update: Tried another 5v relay, same thing.. tried 3v relay, same thing.. PS_ON pin on skr 1.4t give 0-3.3v which is enough for actuating 5v relay. I tested it outside circuit and it clicks, work but.. when i put led psu on COM-NO it wont go off and COM-NO stay closed even if everyting ih switched off. I have no solution, lost 3 days banging head what could be wrong here! Best regardsby mnikola2 - General
Hello! Im using simple 1channel relay module to turn on/off 400w led psu using SKR 1.4t board and external 5v psu. Everything start working from start but.. not! G80 code trigger relay normaly,there is click sound, green led on, PSU start. Later G81, green led go off, click sound but PSU stay on working. When i turn everything off and unplug, ohm meter reading show terminals are still connected lby mnikola2 - General
Tnx for your tutorial yet-another-average-joe. Oled im using is 2.4", work perfectly with this tips. Only problem is that SD is not working. If i select sd(no media) in marlin, board reset itself. I tried to detach sd module, its same, board (skr 1.4t) reset if i choose sd card. I have enabled sdsupport and SDCARD_CONNECTION LCD. Any suggestion?by mnikola2 - Firmware - Marlin