JacobTkeio created this emergency light which would be handy for power outages:
BlackOut Light
Dark-activated, 2.8 candela white LED with wide 160-degree light output powered by a 9 V battery.
EmergencyLight.v02
LED
Tiny, robust, low cost, fail-safe LED driver: the Glighter-S project — ALEA
It has been a while since the last LED related article. Was experimented the linear current source, its pros and cons and the field of application. Now arises the need of a small version, handling the same high power, things that are contrapposed in the linear regulator. I need something that I can bring with […]
via Tiny, robust, low cost, fail-safe LED driver: the Glighter-S project — ALEA
OSH Park 