2answers

[PCB Prototype] How leds are blinking by their own?

I saw Pcbway badges with blinking leds, but I cant find any transistor or so on the pcb, sho how they're blinking
Ranking Name Answers
1 PCBWay Team 8
2 Engineer 1
3 Engineer 1
4 Dr. TRonik 1
5 John samathanam 1