@@ -156,7 +156,7 @@ Now add a reset button. Suitable value for capacitor is found in the MCU data sh
### 13) Power LEDs and test points
In order to see that your system is correctly powered, it is common to add test points for easy probing. It is also recommended you add LEDs to your power rails so you can see they're powered up correctly. You can use an LED such as [](https://www.elfa.se/en/smd-led-645nm-0805-65cd-30ma-kingbright-kptd-2012surck/p/30118951), together with a suitable current limiting resistor. Aim for a forward current of about 2mA. You can use this [LED calculator](https://ohmslawcalculator.com/led-resistor-calculator) to calculate suitable resistor values for your LEDs. Use resistor values from the E12 series.
In order to see that your system is correctly powered, it is common to add test points for easy probing. It is also recommended you add LEDs to your power rails so you can see they're powered up correctly. You can use an LED such as [this red one](https://www.elfa.se/en/smd-led-645nm-0805-65cd-30ma-kingbright-kptd-2012surck/p/30118951), together with a suitable current limiting resistor. Aim for a forward current of about 2mA. You can use this [LED calculator](https://ohmslawcalculator.com/led-resistor-calculator) to calculate suitable resistor values for your LEDs. Use resistor values from the E12 series.
