A simple board design to connect/power a Raspberry Pi, Small Servo (PWM signal GPIO and Power), and LED backlight (GPIO/power), as follows:
LED backlight: https://www.adafruit.com/products/1626
and Raspberry Pi 3.
The circuit is as follows:
The power should be centralized on the circuit - the LED backlight, Raspberry Pi, and 6v servo should all be powered by the same rechargeable micro-USB unit attachable to the circuit. If you could calculate power requirements, and design the circuit to include a specific power supply (and let me know which one to order) that will be great.
Raspberry Pi GPIO signal will control the LED backlight (there should be a simple way in python on my end to programmatically turn the LED light on when the circuit/Raspberry Pi is powered on).
The Servo-Raspberry Pi circuit is like this: http://razzpisampler.oreilly.com/images/rpck_1001.png (yellow wire is servo signal wire) which is connected to raspberry pi GPIO (orange wire). The PWM signal from the Raspberry Pi controls where the servo arm is while the whole circuit is powered on.
The power/voltage/current requirements for each component are shown in the data sheets above (or available publicly for the Raspberry Pi).
Essentially, I need one designed circuit board that attaches to the Servo, LED backlight, and Raspberry Pi; and acts as the power driver for all (micro-usb for Raspberry Pi, etc.). While also hooking up the LED/Servo to the Pi via GPIO so as to allow control programmatically.
The deliverable is a board design I can send off to Circuit Hub for fab/assembly.