![atmega8 VA meter final](https://www.circuitsdiy.com/wp-content/uploads/2011/12/100_1807-1024x760.jpg)
This is a simple use of internal ADC of AVR atmega8. Voltage is measured directly with help of resistor divider and amperes is calculated based on the voltage drop in a low resistance power resistor.
There are currently three revisions of the project.
- Atmega8 based Voltmeter Ammeter for solar application
- PCB update: Atmega8 Volt-Ammeter and USB AVR programmer
- Atmega8 based Voltmeter Ampmeter v2
All the three revisions of the project is licensed under the following license.
These works are licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
![CC License button](https://www.circuitsdiy.com/wp-content/uploads/2019/11/CC_Licence_88x31.png)
You are free to work with the project and make or modify it. But no commercial use of this allowed without written permission. If you adopt this project and make a derivative of this project, you should give proper credit to this project and publish your work in a similar way.
UPDATE: Work in progress for the above mentioned version.
This will include,
- PCB size same as the LCD size.
- A Op-Amp for current sense amplification: Lower voltage drop.
- Better software stability.
- All passives like resistors, and capacitors will be SMD.
- No manual potentiometer. Software will be self fine-tunable when necessary.
Current Status: v3 PCB came in but a major designing fault prevented the production.