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[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
1answers

[PCB Prototype] CAN ANYONE INFORM A CN3085 SCHEME?

CAN ANYONE INFORM A CN3085 SCHEME?
1answers

[PCB Prototype] Please help, you send the product and now DHL cant pic it for me on costumes, they need additional documentation from you, I need the boards, please contact DHL, thanks

Please help, you send the product and now DHL cant pic it for me on costumes, they need additional documentation from you, I need the boards, please contact DHL, thanks
2answers

[Others] Hello Is it possible to get 4 motors working independently

There are two l298n motor drivers, and is it possible to make 4 independent motors work properly, with equal power going to all 4 motors using these two l298n motor controllers? Thanks!
4answers

[Others] Hi, What is the function of these NPN BJTs?

  • answered Jul 18,2020
    by Carl
2answers

[Others] How I can see un-routed airwires in Altium 20?

I tried "View---> connection--> show all" but it does not show un-routed nets. Can anyone help. Thanks.
  • answered Jul 18,2020
    by Andrew
5answers

[Others] Is it possible to command on and off a 5v pump directly from Arduino without a relay?

2answers

[PCB Prototype] How to get %Rh using humidity sensor HR202?

4answers

[Others] Any advice for replacing this damaged micro USB?

Very small leads and pads in a tight location
  • answered Jul 16,2020
    by Joson
2answers

[Others] ERC error, can someone help

I′m trying to connect the anode from a LCD 16x2 screen to 5V with a 220Ohms resistor. According with my Electrical Rules, it is not supposed to have an error between a Power Input pin and a passive pi...
  • answered Jul 16,2020
    by Andrew
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