Name: LED Voltage Meter (Red)
Brand: DFRobot
SKU: DFR0130-R

Logical pinout · physical placement not verified

VIN+one of the two supplied meter wires; positive measurement lead
Positive lead for direct two-wire DC voltage measurement. The DFRobot product page states a simple two-wire connection to the measured power source and a 3.0-30V DC measurement range.
Type · PowerVoltage · 3.0-30V DC measured input
VIN-one of the two supplied meter wires; negative measurement lead
Negative/ground reference lead for direct two-wire DC voltage measurement. The DFRobot product page states the module measures directly from the measured DC source with no extra circuitry.
Type · GroundVoltage · 0V reference for measured source

Pin	Position	Type	Function	Voltage
VIN+	one of the two supplied meter wires; positive measurement lead	Power	Positive lead for direct two-wire DC voltage measurement. The DFRobot product page states a simple two-wire connection to the measured power source and a 3.0-30V DC measurement range.	3.0-30V DC measured input
VIN-	one of the two supplied meter wires; negative measurement lead	Ground	Negative/ground reference lead for direct two-wire DC voltage measurement. The DFRobot product page states the module measures directly from the measured DC source with no extra circuitry.	0V reference for measured source

Logical pinout · physical placement not verified

Pin details

2 connections

VIN+
Positive lead for direct two-wire DC voltage measurement. The DFRobot product page states a simple two-wire connection to the measured power source and a 3.0-30V DC measurement range.
PowerVoltage · 3.0-30V DC measured input
one of the two supplied meter wires; positive measurement lead
VIN-
Negative/ground reference lead for direct two-wire DC voltage measurement. The DFRobot product page states the module measures directly from the measured DC source with no extra circuitry.
GroundVoltage · 0V reference for measured source
one of the two supplied meter wires; negative measurement lead

Start wiring

3.3 V · 5 V

Adafruit lists its single-cell LiPo and Li-ion packs as 3.7 V nominal, with output reaching 4.2 V when fully charged.

Module pins: VIN-. Schematik maps them to your board in the app.

Batteries

103 other options

9V alkaline cells, CR2032 coin cells, 3.7V LiPo packs (1000–1200mAh), 7.4V 2S LiPo, 18650 Li-ion holders (1–6 cells), AA/AAA holders in every configuration, and snap leads with barrel adapters.

View all 103

Related groups

4 groups

Charging

Single-cell LiPo chargers (TP4056, MicroUSB/Type-C modules), charger/booster combos (PowerBoost 500/1000, Lipo Rider Plus 5V/2.4A), I2C fuel gauges (MAX17048, LC709203F) and Qi wireless charging coils.

Power · Chargers & fuel gauges · 47 parts

Power supplies

Wall adapters (5V–24V), adjustable and fixed buck/boost/buck-boost converters (MT3608, LM2596-class), USB-C PD triggers (HUSB238), breadboard supplies, DIN-rail units and passive barrel-jack adapters.

Power · Supplies & regulators · 147 parts

Solar

Solar panels from 1.5V 250mA flexible film to 18V 10W polysilicon, MPPT solar power managers (DFRobot 5V and 9V/12V/18V, Waveshare 6V–24V), bq25185 charger boards and LTC3588 energy-harvesting breakouts.

Power · Solar power · 28 parts

3D printing

DFRobot 1.75 mm PLA in 1 kg spools makes up the bulk of the group, in over 15 colors. Specialty options include PVA in both diameters, NinjaFlex flexible filament, Proto-Pasta conductive PLA, and wood-fill. OverLord printer spares and OverLord printers round out the hardware side.

Tools & prototyping · 3D printing · 53 parts