I tried to use https://www.mouser.com/ds/2/631/ACT4088 ... 345917.pdf
Followed the example guide for step down 12V to 5V. Than, connected LM1117 on the 5V out to get 3.3 and now i have an issue. When i power up the circuit with 12V, everything works until i touch it with probe or some other wire.
The input is 12V 2.5A PSU
What could i do wrong?
p.s. here is the video how it happens
Ah, i noticed something very strange,
if i hold with my fingers the main 12V input (directly on the contacts), and touch some pads with wire in another hand, it doesn't happen
Must me some mess with potentials, grounding .. etc...