Features and specifications: 100A Set / 40Acontroller: Package includes control panel, display panel, matching cable, red and green knob and thyristor. 100A Thyristor / 40A Thyristor: Just Thyristor power transformer: Just 1 AC 9V transformer 220V . If you need 110V , you can search in our store ) Welding Pin: 3 * 100 Welding Pin Alumina Copper Foot Switch: EKW-5A-B Aluminum Foot Switch DKJ10-25 Connector: European Quick Fitting Cable Quick DKJ10-25 Connector Red Rocker Switch: Red Rocker Switch Fused Power Socket This point of the welding machine control board is a DIY or simple resistance welding and independent development of the controller. Using SCR phase shift trigger principle, by adjusting the time, current size, to achieve the purpose of welding. The main features of the controller: 1: STM8 industrial microcontroller to do the main control core. 2: strong and weak through the optocoupler isolation, the operation more secure. 3: power cord and foot switch line with screw-free quick connect terminal, more convenient and reliable. 4: input time, current using high-precision single-bit potentiometer, to ensure reliable and convenient input 5: Onboard power, status, foot, trigger indicator, working status is clearly visible. 6: design a reliable zero-crossing detection circuit to ensure that the SCR phase shift accurate. 7: The controller is compatible with 40A-100A thyristor. 8: a digital control interface, you can display the current set time and current. 9: time input 1-50, unit cycle (1 cycle is 20ms), current input (30-99%) More informations connect picture connect picture welding pen Microwave transformer Controller 9V transformer Boot switch AC 220V / 110V Test picture Powerful functions Compatible with 41-100A thyristor Strong and weak electrical use optocoupler isolation, the operation more secure. Create-free quick connect terminal. Use hand push raised above, put wires in. Time and current digit display. Time range 1-50 cycle, one cycle 20 millisecond. Current range 30-99% Onboard Indicator, can see working status clearly Time and Current adjust knob Industrial microcontroller, stable and reliable 100A set 40A set size