![Controlling an External LED using a Raspberry Pi and GPIO pins | by Shahbaz Ahmed | We've moved to freeCodeCamp.org/news | Medium Controlling an External LED using a Raspberry Pi and GPIO pins | by Shahbaz Ahmed | We've moved to freeCodeCamp.org/news | Medium](https://miro.medium.com/v2/resize:fit:1400/0*Zpa1YOQcMlvu-Sxs.png)
Controlling an External LED using a Raspberry Pi and GPIO pins | by Shahbaz Ahmed | We've moved to freeCodeCamp.org/news | Medium
![relay - Connecting pins of Raspberry Pi GPIO in series in order to turn up the voltage - Electrical Engineering Stack Exchange relay - Connecting pins of Raspberry Pi GPIO in series in order to turn up the voltage - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/RPAhu.png)
relay - Connecting pins of Raspberry Pi GPIO in series in order to turn up the voltage - Electrical Engineering Stack Exchange
![Amazon.com: Low Voltage Labs - GPIO Kit for Raspberry Pi and Arduino with tin Storage Box : Electronics Amazon.com: Low Voltage Labs - GPIO Kit for Raspberry Pi and Arduino with tin Storage Box : Electronics](https://m.media-amazon.com/images/I/61hRrPbDSrL._AC_UF894,1000_QL80_.jpg)