# PWM of a solitary LED **URL:** \ **Category:** Arcade\ **Created:** [September 26, 2022, 11:50pm UTC](https://forum.makecode.com/t/pwm-of-a-solitary-led/15622 "2022-09-26T23:50:35Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![xjordanx](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/xjordanx/32/6537_2.png) [@xjordanx](https://forum.makecode.com/u/xjordanx)\ **Post date:** [September 26, 2022, 11:50pm UTC](https://forum.makecode.com/t/pwm-of-a-solitary-led/15622/1 "2022-09-26T23:50:35Z")
On my board I have an LED, which I can easily turn on and off via the TS code or block for it. But I need to be able to dim the LED using PWM. On the RP2040, all GPIOs are capable of PWM. Yet when I try AnalogWrite for the LED pin the editor barfs. Is there something I need to modify in order to support PWM on the LED pin? It is NOT an APA102 or WS2812 etc. It’s just a plain ol’ LED on a common drain MOSFET controlled by a GPIO pin. ---
**Author:** ![xjordanx](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/xjordanx/32/6537_2.png) [@xjordanx](https://forum.makecode.com/u/xjordanx)\ **Post date:** [September 27, 2022, 4:16pm UTC](https://forum.makecode.com/t/pwm-of-a-solitary-led/15622/2 "2022-09-27T16:16:43Z")
I’ve seen people on YT doing this with regular “Dxx” outputs pins. I’ve configured the P\_10 (GPIO10) of the RP2040 on my board to be PIN\_LED, as well as P10, and D10. When using “LED” in Arcade, I can turn it on and off, and CODAL will flash the LED if I precipitate any configuration errors. When I removed the PIN\_LED from my config and just left it as PIN\_D10, and use the AnalogWrite and AnalogWritePeriod functions, it never lights at all… no matter what the period or PWM level I plug in. Is there some other configuration compatibility issue? This also raises another question which the configuration documents do not document: What is allowed when it comes to applying multiple possible configurations to a single device pin? These might also be questions for @mmoskal I appreciate the help. Just need more info about the bounds within which I need to work.