Dear Sirs,
I am an electronic engineer based in Bulgaria/Europe. I have experience handling electronic devices projects over GAF. On PMB you can check samples of my previous work. The board you request by my opinion should follow some basic steps:
1. Clearing the design of the schematic capture
2. Reaching an adequate solution to your needs
3. Clarifying the parts list according to your manufacture facility stock availabilities. Digging on suppliers list for parts.
4. Board design considerations
5. PCB layout and routing
6. Software design requrements
7. Final solution testing
We can start with step 1 above and then I can say some adequate time schedule we can both accept.
I can say I need ~50hours for step 1 and 2; ~10h for step 3; ~60h for steps 4,5; ~80h for 6,7
So roughly ~200 hours of work +max 10% over for details that I cannot predict at this stage.
My expected hourly pay off is $6.
The microcontrollers I use are Texas MSP430 series
and Microchip PICs. However I suggest that we rely on this project on some MSP430 uC. Basicly the schematic design I suggest involves uC with integrated opAmp for impedance adjustment of the input and with integrated ADC,DAC,SPI; additionaly external Flash memory with SPI will take place.
Regards Venelin Vasilev