Board for controlling the vacuum. It has 2 outputs for SSR (230V prevacuum pump, 230V prevacuum pump valve), 2 outputs for vent valves, inputs from pirrani and CCG gauges and port for TMP controller.
![](https://cdn.hackaday.io/images/8050491522493028916.jpg)
![](https://cdn.hackaday.io/images/9004351522493030280.jpg)
![](https://cdn.hackaday.io/images/5230831522493029941.jpg)
A project log for Metal 3D printer
Making an electron gun is a first stage of my future plans - to make DIY electron microscope/EBM metal 3D printer.
Board for controlling the vacuum. It has 2 outputs for SSR (230V prevacuum pump, 230V prevacuum pump valve), 2 outputs for vent valves, inputs from pirrani and CCG gauges and port for TMP controller.
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