Phase 1: My goal is to design five PCBs that include resistors, capacitors, active devices and various input and output components. These will mount on a laser cut wood base similar to the original design, but smaller. One of the issues with the original design is the springs would oxidize, and the wires would break. I am planning on using standard breadboard jumper wires with headers on the board to make the connections.
Another question on the LED resistors.
Looking at the LED for the 9V circuit, it is a 2.1V drop at 20mA. Given the 9V supply, we should expect to see a 360Ω resistor, but the BOM specifies 1K. That leaves the LED a bit on the dark side, but serviceable.
For the 3V circuit, the LED has a 2.05V drop at 20mA. Given the 3V supply, the resistor should be 51Ω, but the BOM has it as 4.7K which makes for a really dim power indicator.
For the big red LED, what voltage are you expecting to go to it nominally? With the 100Ω resistor, there isn't much of a drop.
Am I missing something obvious?