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 10
2 Marcell Feher 2
3 Engineer 1
4 Brandon Weatherly 1
5 Rayan Bayan 1