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bigtreetech / BIGTREETECH-SKR-MINI-V1.1

ARM Cortex-M3 series STM32F103RCT6 chip with 32-bit CPU 72MHz. Equipped with highly modular open source firmware Marlin2.0, convenient for users DIY and secondary development, exempt from the worries of the core code;
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Weak Power Regulator? #12

Open ThWoell opened 5 years ago

ThWoell commented 5 years ago

Experimenting with the Board I had to find out that the 5V Regulator on the Board is a little weak in Voltage and also sensitive to noisy Input power. Measured Voltage 4.8V (with 12 V input from adjustable Workbench PSU)on the dc select INT pin The board will boot most of the time, but sometimes not. When a Hotend fan comes in, wired parallel to the Board, things get worse: Now it will not boot again; just when you hit the reset button it will start the boot sequence. So if you experience similar problems, please check for the voltage. Since there is no wiring diagram, it is quite a task to find out which regulator on the board will supply what. Setting dc select to USB the Board boots every time without flaws (measured Voltage 5.1V)

NamkingWIN commented 4 years ago

I have the same problem. Anyone can fix this?

mirokymac commented 4 years ago

I get my board on Dec.2019. 5V rail is on 4.96V.

Rodov commented 3 years ago

It work fine for me - the board boots every time. I am using 12 Volt computer PSU.