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1 kanal CH DC 5V 220V 5A SSR Solid State Relais Modul High Level Trigger für Arduino R3 EINE Schalt Transistor Bord|Integrierte Schaltkreise| - AliExpress
![Pulldown resistor value for an NPN transistor to switch a solid state relay - Electrical Engineering Stack Exchange Pulldown resistor value for an NPN transistor to switch a solid state relay - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/cVUdq.png)
Pulldown resistor value for an NPN transistor to switch a solid state relay - Electrical Engineering Stack Exchange
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