# Hack: Use Hall Effect switch as Flash button **URL:** \ **Category:** Hardware\ **Created:** [June 27, 2024, 7:10am UTC](https://wled.discourse.group/t/hack-use-hall-effect-switch-as-flash-button/12133 "2024-06-27T07:10:39Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![TokyoDave](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/tokyodave/32/7405_2.png) [@TokyoDave](https://wled.discourse.group/u/TokyoDave)\ **Post date:** [June 27, 2024, 7:10am UTC](https://wled.discourse.group/t/hack-use-hall-effect-switch-as-flash-button/12133/1 "2024-06-27T07:10:39Z")
The idea came to me in a flash: rather than cutting holes for a flash button for my custom boards, why not use a Hall Effect switch which I can activate with a magnet outside the case? I have a USB Stick format ESP-M2 based controller, but cutting holes for buttons was always a hassle. Replacing the flash button between GPIO0 and GND with the dirt cheap A3144 solves that issue very cleanly. I’m now looking for a cheap 3.3V Hall switch for other projects… ---
**Author:** ![dedehai](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/dedehai/32/7265_2.png) [@dedehai](https://wled.discourse.group/u/dedehai)\ **Post date:** [June 27, 2024, 9:24am UTC](https://wled.discourse.group/t/hack-use-hall-effect-switch-as-flash-button/12133/2 "2024-06-27T09:24:40Z")
you can also use a reed switch. ---
**Author:** ![TokyoDave](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/tokyodave/32/7405_2.png) [@TokyoDave](https://wled.discourse.group/u/TokyoDave)\ **Post date:** [June 27, 2024, 10:50am UTC](https://wled.discourse.group/t/hack-use-hall-effect-switch-as-flash-button/12133/3 "2024-06-27T10:50:32Z")
That’s definitely an option and one with which I’m not familiar. As I google around, reed switches are quite a bit bigger than HE switches, but I’ll take a look.