红水杯

attiny85 spot welding machine

Overview

The attiny85 spot welding machine
adopts optocoupler control
with a total of 5 gears, and the pulse time is 0.045-0.225s.
When using the battery pack to power supply, first set the DIP switch to the corresponding gear. For example, for a 3s battery, set switches 1, 2, and 3 to on. The power supply only requires welding 78l05.
When using a 3.7v battery for power supply, the 2108A50 boost chip does not need to be welded. At this time, R12 cannot be welded, and the battery voltage cannot be detected at this time.
If you need to use a 12v battery pack or Farad capacitor, please change the voltage calculation part of the code or calculate and change the resistance of the voltage dividing resistor yourself.
Personal test shows that when using a 3.7v power battery, the 3rd gear can weld 0.1mm nickel steel, the 4th gear can weld 0.15mm nickel steel, and the 5th gear smells obviously burnt and is not recommended for use.

Design Files

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Update:2025-06-23 10:49:43

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