Arduino Powered TIG AC/DC

The idea is not new, but there are very little open source projects on this. The only promising link was https://github.com/freq0ut/Due-Pulse-Welder, but no hardware diagrams. My existing TIG welder is DC only, a look inside reveals a design similar to below, with three transformer stages in parallel. Now convert this output to AC. Easy? Add … Continue reading

3D Edge Finder, Touch probe, Digitizing Probe

Once you start milling you soon realize all work has to be referenced, easily done with a round bar with known diameter, but a lot of calculating with manual dials. Mechanical devices like wiggler are easy to build but only work in 2D and can not interface to the DRO. My mill came with a … Continue reading

Distributed PLC

My interest in programmable controllers and microprocessors dates back to my student life in the 90’s. Recently I started playing with NodeMCU and its eLua based firmware for the ESP8266 WiFi SOC from Espressif. The idea of a distributed plc has been lingering ever since I connected a AT 2313 to a nrf905. This should … Continue reading