In potentiostat ( Three Electrode System) of electro-chemical, I need to apply negative voltage range from -1.50 to -0.30 DC V (up to 50 mA range) as a source power to electrodes, and that the negative voltage source must be very precise and accurate.
I am also thinking about PIC or Arduino microcontroller, if I can do on it..
Please suggest for circuit and/or microcontroller....