Mini battery sensor

[Ivan Z]

I was inspired by the project "Minimal design thoughts" and i made my version, without 32Khz crystal, EPROM and security

MDSens.zip

The result

I have no experience with write bootloader. Without crystal.

Please help my start my project

I want use Optiboot bootloader

Best regards from MajorDomo project users

[tbowmo]

You need to set the correct fuses for your board, in order to get it to run at 8Mhz, use the following site to calculate the correct settings:

http://eleccelerator.com/fusecalc/fusecalc.php?chip=atmega328p&LOW=E2&HIGH=DC&EXTENDED=FE&LOCKBIT=FFF

(I've set the fuse bits that I see as the optimal settings)

Next you need to program your bootloader into the device, find a copy of optiboot, and compile it for atmega328_pro8 profile which should provide a hex file that you can program to your device, using an available ISP programmer, with avrdude (or whatever tool you like to use).

[Ivan Z]

Thank
Sensor ready work. (I have not valid binary Optiboot)