Does anyone know what specific mcu are used in these cheap remotes?

John P

Joined Oct 14, 2008
1,974
If the positive power supply is on pin 1 and Gnd on pin 8, I'd suspect that it's something in the PIC family. But maybe that would be a false trail.
 

ErnieM

Joined Apr 24, 2011
8,294
In other news there is an abundance of libraries for lots of devices that can read out the IR codes and send them back to your PC so you can "roll your own" sending device. Adruinos and ESP-xx are two that come to mind. I've worked with the ESP things and you can get them packaged on a PCB along with a USB-RS232 interface for programming and debug (and getting those codes!)
 

bassbindevil

Joined Jan 23, 2014
422
There are some very cheap Chinese microcontrollers.
https://cpldcpu.wordpress.com/2019/08/12/the-terrible-3-cent-mcu/

Google pointed me to:
http://www.szkexinda.com/?products_26/807.html
and (insert your favourite happy profanity here) there's the data sheet:
http://www.szkexinda.com/static/upload/file/20210522/1621648461281855.pdf
I guess it's possible they buy microcontrollers and program them, or they could order them already programmed.

Based on another link to a collection of remote codes, it's remotely possible that the "807F" means "NEC protocol 807f".
 
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