Review on 🔋 Buck Boost Power Supply Module USB Voltmeter Tester: 5V Multi-Function Meter with LCD Voltmeter, Ammeter, Battery Capacity Tester, Power Tester, Temperature Display, and PWM Generator by Adam Jackson

The Yemiugo 120W buck-boost converter is a very versatile device. It has an input voltage range of 5 to 30 volts and an adjustable output voltage of 0.5 to 30 volts with a maximum current of 3 amps. It is also able to work with constant current, for example as an LED driver. In testing I used a power supply set to 15 volts with a maximum current of 5 amps. The device worked as advertised. With the multiturn trimmer, the output went smoothly from 0.5V to 30.1V while going through the 15V input and switching from buck to boost. I then connected an ammeter in series with the 3W LED and set the current to 300mA. The current study was done when I changed the input voltage from 5 to 20 volts. I was always looking for everyday usable modules for such modules, so I connected the output to a DC load set at 3 amps and set the output voltage to 5 volts. I had no problem drawing 3 amps at 5 volts with an input voltage of 10 to 15 volts, the normal range of car battery voltage. This means you can easily create a multi-output USB charging station and use it in an automotive or even marine environment. Even at full power of 3 A, nothing heats up on the device, not even when touched. In general, the device does everything it should. says it can be done at a very affordable price.