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Home made etching machine driver

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Vermes

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Etching machine driver presented in this article is to adjust the temperature of aqueous solution of sodium persulfate, and manual turning on and off the aquarium air pump.

Hysteresis was fixed on 2 degrees Celsius. Maximum power of the heater is 1000W. The system is based on microcontroller Attiny2313. The program was written in Bascom-AVR and it takes 94% of the system memory. Temperature sensor DS18B20 measures the temperature of the solution. Executive elements consist of relays. Three buttons are used for setting the temperature and turning on the air pump. The PCB was made in thermal transfer method.

Video of operation:


Pictures:




Link to original thread - Sterownik wytrawiarki by HubertFab
 

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