The spot welder control module is developed for the DIY or simple battery welder. Mainly used for welding nickel-plated single cells or batteries. The module includes main board and display board, optional 40A and 100A bidirectional thyristor, excluding welding transformers, welding pens and other tools. Features: 1. You can save the last operation, monopulse triggers this module. 2. Voltage compensation: According to the local voltage change, automatically adjust the compensation output, and display the local voltage and compensation value for about 1 second when triggered. 3. 0-999 weld counting function: The number of welds is clear at a glance. Press and hold the encoder for 3 seconds to clear the count bit. 4. Input time 0-99 cycle (1 cycle is 20ms), welding force adjustable from 30% to 99%. 5. 9-12V AC power input, need to use AC transformer. 6. Power input and external trigger are convenient and quick, no need to solder terminals. Specifications: Power supply voltage: 9-12VAC Bidirectional thyristor: 40A, 100A (optional) Package weight: approx. 10g How to use: 1. Voltage calibration Voltage calibration should be carried out for the first time. Calibration is no longer necessary until the module's power transformer is replaced. Of course, if the voltage is not correct, you can also calibrate it. Calibration operation: press the encoder button, then power the module, enter the calibration interface. The first option can adjust the flashing value, adjust with the short encoder, after three adjustments, short press the encoder to enter the operation interface. For example, the measuring voltage is 220V, then the calibration interface can be adjusted to 220. 2. Display interface Digital adjustment: short press the encoder button until the corresponding value flashes, short press the encoder to enter the working interface. In the working interface, when the calculated value is greater than 0, press the encoder for about 3 seconds to clear the value. Package List: 1 * Main Board 1 * Display Board 1 * Ribbon Cable