PCB etcher with aquarium pump and heater

Probably you have read about our PCB etcher on our site. We planed to make it fully automatic with heater, bubble machine and thermostat. But fact is that it wasn’t finished. But we are actively using it with aquarium heater only and manual mixing :). If you are looking for something similar that has a bubble machine installed you should see YourITronics brand new PCB etcher with aquarium pump and heater. They use a bubble machine that speeds up etching process and you don’t have to mix solution. The tank is made of plexiglas and holds 1.5L of liquid. All together with pump, heater and other materials etcher costed about $41 – this is much cheaper than buying from store. This tool is a must have along with UV exposure unit.

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PCB Etcher

After UV-80 vas built there was a thought about automatic PCB Etcher with autonomous Heater and bubble machine. This project is hanging in prefinished phase but it does a job. It was used to etch several PCB’s. As this etcher supposed to be used for making PCB’s using photoresitive technology, the controller supposed to control both = the heater of etching tank and heater of developer. As Sensors there are used AD7416 digital temperature sensors. I decided to publish this small project as this is not clear when it will be finished. When it will be, I will update this article. There is a little dirty drawing with dimensions: The dimensions are as follows 215x275x30 exterior. Inner volume is smaller as glass is 4mm thick. So overall volume is less than 1,2 liter. It is ideal volume to use one bag of ammonium persulphate or 250 grams of FeCl3. The glass plates are glued with aqua silicone. Sides are strengthened with aluminum profiles (not necessary if you have skills of gluing aquariums). As you can see it is only manual control 🙂 Thermometer, heater and tank with etchant. Thermometer has scale with more than 50°C as solution shouldn’t exceed this…

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