I need a PCB design and further a prototype model. The key requirements are:
1. output a constant 200-800 µA in a 3,9 Hz mode, independend of resistance in between (voltage must be adjusted to keep Amperage at constant level, should range from 6 to 15 V, means 1.0 to 2.5 times the 3V + 3V batteries).
2. Count the overall hours.
3. Display elapsed time, Amperage and voltage settings, as well as status message (error etc. if any).
4. Have 5 levels settings of Amperage (0, 200, 400, 600, 800).
We can accomplish the requirement. i beliew you need a costant current source with option to change to 0, 200, 400, 600 and 800uA and an LCD to display. Please send us your feedback.