# Retired transmitter replacement help **URL:** \ **Category:** Retired Products\ **Created:** [February 18, 2024, 9:13pm UTC](https://community.sparkfun.com/t/retired-transmitter-replacement-help/46985 "2024-02-18T21:13:52Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![teddythecoach](https://avatars.discourse-cdn.com/v4/letter/t/f0a364/32.png) [@teddythecoach](https://community.sparkfun.com/u/teddythecoach)\ **Post date:** [February 18, 2024, 9:13pm UTC](https://community.sparkfun.com/t/retired-transmitter-replacement-help/46985/1 "2024-02-18T21:13:52Z")
Hello, I’m trying to build this timing system for my track team for practice. The instructions I’m using are from 2019, so some parts have been retired. Can anyone help me find replacement parts? Here is the link to the retired page: [https://www.sparkfun.com/products/retired/705](https://www.sparkfun.com/products/retired/705) Here are the instructions: [https://www.google.com/url?sa=t&rct=j&q … i=89978449](https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwj4k67z9q2EAxVf5ckDHVWHDtQQFnoECBMQAQ&url=https%3A%2F%2Fwww.instructables.com%2FArduino-Laser-based-Timing-System%2F&usg=AOvVaw3XxLlPspPzb_hPAxPPu6-R&opi=89978449) ---
**Author:** ![jremington](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/jremington/32/6595_2.png) [@jremington](https://community.sparkfun.com/u/jremington)\ **Post date:** [February 19, 2024, 12:27am UTC](https://community.sparkfun.com/t/retired-transmitter-replacement-help/46985/2 "2024-02-19T00:27:42Z")
The nRF24l01+ radio transceiver chip is obsolete, but modules are still widely available on Amazon and other distributors. I don’t see what the instructions you linked have to do with that radio, though. [https://www.amazon.com/HiLetgo-NRF24L01 … B00LX47OCY](https://www.amazon.com/HiLetgo-NRF24L01-Wireless-Transceiver-Module/dp/B00LX47OCY)