Voltmeter digital red 0 Voltmeter digital red

Description

The voltmeter is capable of measuring DC voltage ranging from 0 V to 99.9V. Has a very small size. To measure voltage below 4.5V requires additional power 4,5 - 28V.

Characteristics of a digital voltmeter:

• Measuring range: DC 0-99.9 IN
• Supply voltage: 4,5 - 28V
• Accuracy: 0,1 IN
• Error: 1%
• Display resolution: 3 discharge
• Temperature Range: -10 – +65°C
• Dimensions: 23x10x10 mm
• The weight: 5 r

Connecting the voltmeter:

Black wire – negative input (-).

Red wire – positive power input (+).

White wire – positive input from the measured circuit.

To measure voltage in the range 4,5 – 28V it is advisable to connect the white and red wires. This will avoid using an external power source.

чтение карты if ( ! mfrc522.PICC_ReadCardSerial()) return;

чтение карты if ( ! mfrc522.PICC_ReadCardSerial()) return;