Vermes
Advanced Member level 4
It is a multimeter to measure current and voltage in the power supplies with measurement resistor in the negative voltage.
This device requires only one supply voltage, which is available in most power supplies and does not have to be galvanically isolated from the rest of the system.
In addition, the multimeter can control turning on and off the fan, which cools the heat sink of the power transistors. Switching threshold can be adjusted smoothly.
Parameters:
- based on Atmel microcontroller Atmega8
- voltage measurement range 0-30V
- 10mV of voltage measurement resolution
- 10mA of current measurement resolution
- powered by a single, galvanically not isolated voltage
- one-sided PCB
- compact construction which allows you to use the multimeter as a panel meter
- work with standard LCD displays
Some pictures of the multimeter:
And picture of operation of the multimeter:
More pictures can be found at: LINK.
Hex can be found at: LINK
Link to original thread (useful attachment) – Multimetr LCD do zasilacza