Dc to dc 5 volt converter.. converter circuit LM2678 (5A step-down regulator) based on the layout of the board quite well designed also LM3914 prepared with LED voltmeter Node voltage monitoring is easy In addition to “backup” backup battery has sections 8 AA batteries can be connected. Between 7 …. 40v DC adapter to the DC input jack can be connected subcontracted with 5v devices or devices that can operate via USB portable power supply for the supply of …

Finally Voltmeter prepared with LM3914 circuit is intended as an additional module for printed circuit board pcb circuit separately so that you can use for different projects used instead of the normal LEDs SMD LEDs can also be connected.

USB Battery Pack DC to DC 5V LM2678 Converter LM3914 Voltmeter power electronic projects dc dc converter circuit

USB Battery Pack DC to DC 5V LM2678 Converter LM3914 Voltmeter power electronic projects dc dc converter circuit

Source: alex-ismagilov.com alternative link: usb-battery-pack-dc-to-dc-5v-lm2678-converter-lm3914-voltmeter.zip