so, this is perhaps one of my biggest problems yet. It's going to be a power supply with the following specs: * Outputs: o +5V o +12V o +1.2V to +37V o -1.2V to -37V * Relays for switching off the outputs individually. (6x relays) * LED 7-Segment display for displaying the output on the variable outputs. (2x 3digits) * LEDs for showing the states of the relays. (5x 5mm Red LEDs) * Buttons for switching the outputs on and off. (6 buttons) * Potentiometers for setting the value of the variable outputs. (2x 10k pots) * Serial connection with the possibility of controlling the supply from the computer. * Arduino for connecting... o 1 MAX7219 (display controller) o 2 MCP4131s (digital pots for the variable outputs) witch o 4 Relays (for switching the outputs) o 6 Buttons (for controlling the relays) o 1 FT232 (USB-to-Serial converter) * Easy to build, without to much SMD parts and with easy to get parts.
And now I have a first schematic done, and as my perhaps weakest point in electronics is the calculation of values and similar things I now want to know if the part values and the rest is done in a at least working way from someone who knows better than I do.
I have attached the schematic as eagle .sch and as .png image if you don't have eagle.