20-06-2012, 05:52 PM
Voltmeter + Ammeter LCD panel
Introduction
This multimeter was designed to measure output voltage and current in a PSU, where the current sense shunt resistor is connected in series with load at the negative voltage rail. It needs only one supply voltage that can be acquired from main PSU. An additional function of the multimeter is that it can control (switch on and off) an electric fan used to cool the main heatsink. The power threshold at which the fan switches on can be adjusted using One Touch Button Setup.
Technical Specifications
• single uC ATMEL ATmega8 used to handle all the multimeter functions.
• voltage range 0-30V.
• voltage measure resolution 10mV.
• current measure resolution 10mA (depended on current sense resistor value).
• single, non isolated voltage supply.
• one side PCB.
• compact construction allowed to use the multimeter as panel meter.
• compatibility with standard LCDs based on HD44780 controller.