Brand New Power Supply Voltage Regulator kit DIY Electronic kit Set 110V to DC1.25-12V Voltmeter Welding Training Adjustable regulated power supply assembled DIY kit, 110V input voltage, 1.25V-12V adjustable voltage output. Suitable for electronic DIY electronics enthusiasts to learn, welding practice. And can be used for electronic DIY small circuit power supply. Product function: output current: 200mA, suitable for DIY small circuit power supply, one adjustable signal generator output, convenient to provide pulse signals to the experimental circuit, logic pen to test the logic level, and a buzzer to test whether the circuit is powered And low frequency signals. welding skills: 1. Weld small components such as resistors and capacitors first. 2. Weld LM317 to the radiator. 3. Weld voltmeter-4. Weld transformer-5. Fix transformer and PCB with screws. folder. Required tools: electric iron: 30W, solder wire: 0.8-1mm, tweezers, diagonal pliers. Product parameters: Transformer power: 2W, Sh