Digital Voltmeter (0-100V) and Ammeter (10A) Dual LED Measurement Module

This module gives a project a combined voltage and current readout from a single compact board, displaying both figures simultaneously rather than needing two separate meters wired in. Voltage reads on a red LED display across a 0 to 100V DC range, while current reads on a separate blue LED display across a 0 to 10A range, and the two colors make it easy to tell at a glance which number is which without reading labels closely.

Measurement accuracy is rated at 1%, with a minimum voltage resolution of 0.1V and a minimum current resolution of 0.01A, precise enough for monitoring a battery pack's charge state, checking a power supply's actual output under load, or keeping an eye on a motor's current draw during testing. The module itself runs on an input voltage of 4.5V to 30V DC with a current draw under 20mA, light enough to leave permanently wired into a project without meaningfully affecting its power budget.

Wiring uses a five-wire color scheme: a thin black wire for the module's own negative supply, a thin red wire for its positive supply, a thick black wire for COM, a thick red wire for the voltage input (PW+), and a thick yellow wire for the current input positive (IN+). The module's own documentation carries an important safety note: input voltage must not exceed 30V, since going beyond that risks burning out the board, a limit worth designing around carefully in any project feeding it from a higher-voltage source.

The package includes the module itself along with a two-wire and a three-wire thin connector for the supply and signal wiring. Builders adding a permanent voltage and current readout to a battery charger, a bench power supply, a solar charging setup, or any DC circuit where keeping an eye on both figures matters will find this dual-display module a straightforward, inexpensive way to do it.