Made a pair of these (2 kids, so each needs their own).

Made a pair of these (2 kids, so each needs their own).
Lexan has been replaced with steel, and both have identical coding uploaded.
One, however, I’ve had to reload the code twice in the past 8 hours… not sure what the problem is, though I did find that the 9v battery was only putting out 5.83v, so the battery might not have been able to put out enough current to power the LEDs.
I think I’m gonna add in an adapter port so they can be placed on a surface for extended usage, as 9v batteries can get expensive.
Since they took awhile to make, I want them to be as perfect as possible (even though they’re prototypes).

They’re running off a 9v battery to the Vin on a nano, and the 5v ws2812b supply comes off the nano.
Anybody ever had problems with code being erased off a board?

Looks like you are using a regular 9V Block. Lithium is a good choice when you want to draw high peak current
http://www.ebay.de/itm/9V-Lithium-Rechargeable-Battery-For-Microphone-Remote-Control-FAST-FREE-USA-SHIP-/272030798558

PLEASE be careful with charging. Lithium does not forgive any errors and answers it (sometimes days later) with an explosion.


Use a suitable charger - PLEASE !!
http://www.amazon.com/EBL-Battery-Lithium-ion-Rechargeable-Batteries/dp/B00ER10DZ0

Oh, I’m not wanting it to be a rechargeable setup, I just wanted to have a way for the parents to have it plugged in, instead of running through batteries left n right.
The adapter and batteries would be isolated from each other using diodes.