DIY weller WMRP/WMRT soldering station project (open source)

[nexus]

Hi all,

Thought I'd share a writeup I did on an open source project I built. I wanted to use a nice set of Weller hot tweezers for small SMT rework but did not want the compatible boat anchor station. I found this open-source alternative that was a fun project by itself and could be built on the cheap too! The project repository is linked in the article.

https://neonkev.com/2020/07/16/diy-weller-wmrp-wmrt-soldering-station-open-source/

Cheers

[thm_w]

Nice clean build.
Is it using the two heaters in series and one thermocouple?

Relevant link: https://www.eevblog.com/forum/reviews/whats-inside-weller-wmrt-tweezers/25/

[nexus]

Thanks. I'm a little OCD, so the final assembly took wayy to long.

This design uses a dual mosfet and dual auto zero op amp; each heater is being monitored and cycled independently. Attached a photo of that part, the entire circuit diagram is online here: http://kair.us/projects/weller/weller_driver_v11_circuit_diagram.pdf