Features 0-999 welding meter function: the number of welds is visible at a glance. Press and hold the encoder for 3 seconds to clear the counting bit. Time input 0-99 cycles (1 cycle is 20ms), adjustable welding strength 30%-99%. The power input and external trigger are convenient and fast, no need to solder connectors. Voltage Compensation: Automatically adjust the compensation output according to the local voltage change, and display the local voltage and compensation value for about 1 second when triggering. 9-12V AC input, AC transformer required. You can save the last operation, monopulse triggers this module. The spot welder control module is designed for DIY enthusiasts or simple battery welders. Mainly used for welding nickel plated single cells or battery packs. The module includes a motherboard and display board, optional 40A and 100A bi-directional thyristor, without welding transformer, welding pins and other tools. Specification: Supply voltage: 9-12 VAC. Bi-directional thyristor: 40A, 100A (optional) Package weight: approx. 10 g. How to use: 1. Voltage calibration The first time a voltage calibration must be performed. Calibration is no longer required as long as the power transformer of the module is not replaced. If the voltage is not correct, you can also calibrate it. Calibration process: press the encoder button, power the module and enter the calibration interface. The first option can adjust the flashing value, set with the short encoder, after three settings, briefly press the encoder to enter the operating interface. For example, the measuring voltage is 220 V, then the calibration interface can be set to 220. 2. Display interface. Digital setting: briefly press the encoder button until the corresponding value flashes, briefly press the encoder to enter the working surface. If the calculated value in the working interface is greater than 0, press the encoder for about 3 seconds to clear the value. Package list: 1 x motherboard. 1 x scoreboard. 1 x ribbon cable. Package List