Help simplifying an Arduino Nano setup for kids' electronics workshops (wiring and battery power)
I'm developing hands-on STEAM/maker workshops for children where they design and build interactive creations using an Arduino Nano, servos, ultrasonic sensors, arcade buttons and WS2812B LED strips.
The idea is for children to connect the components themselves (with adult guidance), so I need something simple, reliable, safe and independently powered so they can take their creations home.
I paid a PCB designer to develop a custom Nano carrier board with JST-XH connectors, an ON/OFF switch and external power input.
I'm currently facing two problems:
- Power: The board works when I connect a USB power bank directly to the Nano, but powering through the PCB's external JST-PH input hasn't worked reliably using a 4×AA battery holder. I've also tried a USB-C power bank connection, with intermittent results. The power LED sometimes flickers when I touch the board's switch.
- Wiring: I'm currently using JST-XH-to-female-Dupont cables, followed by male-to-male jumper wires to connect components such as servos. It's messy and not ideal for children assembling their own projects.
I'm wondering whether I should try to salvage the custom PCBs or return to a standard Nano expansion shield, which has worked reliably in my tests.
What would you recommend for simplifying the connections and providing safe, reliable battery power? Is powering the Nano directly via USB suitable when running a servo, ultrasonic sensor and LEDs together, or should I be using a different power arrangement?
I'd really appreciate advice from anyone who's built similar educational electronics kits!