Voltmeter Ammeter Kit - Blue Backlight LCD

Voltmeter Ammeter can measure voltage 0-70V or 0-500V with 100mV resolution and current consumption 0-10A or more with 10mA resolution. The meter is a perfect addition to any power supply, battery chargers and other electronic projects where voltage and current must be monitored. The meter uses PIC16F876A microcontroller with built-in ADC (Analog to Digital Converter) and 16 x 2 LCD display with blue backlight. With slight modification it is possible to measure higher voltage and current.

View Schematic

To measure voltage that is higher than 70 Volts simply replace R3 6.8K resistor with included 1K resistor. This will allow to measure up to 500 Volts.

To measure current that is higher than 10A simply replace 0.47 Ohm 5W power resistor with higher wattage or lower resistance resistor. For example 0.1 Ohm 10W resistor will allow to measure up to 20 Amps.

This kit comes with all the parts required to build Voltmeter Ammeter including PCB with beautiful red solder mask and plated through holes. Voltmeter can also measure AC voltage if rectifier bridge is added to voltage input. This meter can both measure and be supplied by the same power source.

Specifications

Voltage Supply: 6 - 30V

Current Consumption: 10mA

Voltage Input: 0 - 70V / 0 - 500V @ 100mV Resolution

Current Input: 10mA - 10A @ 10mA Resolution

Component List
   1x 16 x 2 LCD Display with Blue Backlight
   1x PIC16F876A - Programmed microcontroller
   1x High Quality PCB with red solder mask and plated through holes
   1x 28-DIP IC Socket
   1x 4MHz Resonator
   1x 16 x 1 Gold Plated Male Header
   1x 16 x 1 Gold Plated Female Header
   1x 4 x 1 Gold Plated Header
   1x LM7805 5V Voltage Regulator
   1x 10K Trimmer Potentiometer
   1x 4 x 10K Network Resistor
   2x 100K 1% Metal Film Resistor
   2x 6.8K 1% Metal Film Resistor
   1x 1K 1% Metal Film Resistor
   1x 10 1% Metal Film Resistor
   1x 0.47 Ohm 5W Power Resistor
   1x 100nF Ceramic Capacitor
   1x Manual with Schematic