VOLTMETER MINI RED 2 WIRE

Tiny 2-wire self-powered panel voltmeter with 0.28" red LED display. Measures DC 4.5–30V directly from the source — no external power supply needed. Automatic decimal point: two decimal places below 10V, one above. Reverse polarity protection — no damage if wires are swapped. Best operating range: 5–24V. Max 30V — allow margin for voltage spikes and ripple.

Connections:

• Red wire — Source positive (+)
• Black wire — Source negative (−)

Specifications:

• Display: 0.28" LED (red)
• Voltage Range: 4.5–30V DC
• Accuracy: 0.1V
• Min Input: 3.6V | Max Input: 28V
• Display ON Voltage: 2.5V
• Current Consumption: 15mA
• Refresh Rate: 200ms
• Operating Temperature: −10 to +60°C
• Mounting Hole: 3mm
• Wires: 2 | Colour: Red
• Reverse Polarity Protection: Yes

Applications:

• Battery voltage monitoring in motorcycles and cars
• Panel-mount DC voltage display
• DIY power supply and solar project voltage indicator