Find file History
Permalink
Type Name Latest commit message Commit time
..
Failed to load latest commit information.
assets [RgbNightLight] add project Jan 6, 2019
.catalog_metadata [RgbNightLight] add project Jan 6, 2019
README.md [RgbNightLight] add project Jan 6, 2019
RgbNightLight.fzz [RgbNightLight] add project Jan 6, 2019

README.md

#446 RGB Joule Thief Night Light

Testing a slow-flash RGB LED with a 1.5V joule thief power supply.

Build

Here's a quick demo..

clip

▶️ return to the LEAP Catalog

Notes

I recently got hold of some 5mm RGB Flashing LEDs from a seller on aliexpress - some slow and fast flashing varieties just out of curiosity. Here I've put one the slow-flash kind in a "night light" circuit.

I decided to power from a little 1.5V CR1216 coin cell. To boost the voltage sufficient to power the LED, I've attached a toroidal joule thief circuit, similar to LEAP#137 ToroidJouleThief.

The oscillating voltage produced by the joule thief is not suitable for the flashing LED as it is liable to get stuck on a single colour, so I've added a diode/capacitor charge pump to provide a more stable power source for the LED.

Construction

The circuit and breadboard equivalent are shown below, however for the actual construction I've gone a bit freeform including fashioning a battery holder from 0.9mm copper wire. The CR1216 battery slips in nicely (I haven't added a power switch - the battery must be removed to turn it off).

Breadboard

Schematic

RgbNightLight_layout

Credits and References