Vermes
Advanced Member level 4
It is a simple but very pleasing to the eye shop window lighting excellent to attract customers' attention during Easter time.
There are some interesting effects – independently controlling two channels RGB as well as independent control of white LEDs that backlight the top.
Components:
- processor Attiny2313
- few BD transistors
- stabilizer 7805
- capacitors filtering the power
- PCB
Construction:
- RGB LED strip – 2 lengths of 1m
- profile/aluminum fascia LED – 2 x 1m
- white LED strip – super bright – about 80cm
The driver is places in a transparent housing on the top of the shop window and is practically invisible.
Alumium profiles has milk white lids, so the light is beautifully diffused. In the pictures it looks a little different because the camera captures the individual LEDs. In fact, the eye sees beautiful changing colours of the two poles.
Although the driver has only one channel RGB, there was used a little trick that the same transistors control two RGB strips, but their colours are connected in a different way. It gives a very pleasant effect. Rainbow colours slowly change in a different rhythm on the left and right side. In addition, strips with white LEDs are placed on the ceiling of the decoration and controlled separately.
Everything is controlled by program channels PWM with a resolution of 10 bits, which gives very beautiful effects and smooth colours transitions. In order not to get bored while watching, the slow rhythm of changing rainbow colours is disturbed after some period of time (few to several minutes – completely at random) by a brief flicker.
Input to the CPU can be downloaded here: **broken link removed**.
Link to original thread (useful attachment) – Witrynka RGB - ATtiny2313 - taśmy LED - profile alu
