RGB shelf lights

 Hi! At most I don't have much time to post here. But I'm trying))

Here is a combination of my KSN20 RGB controller and shelf light endpoint repeaters.

At first, final result:

RGB controller

 

Hi! I like decoration lights, so RGB controllers are "must have" devices for me =)

I decided to make module system, so for any light power I need only different type of repeaters instead of making new controller board for each purpose.

So this is main RGB controller board designed for my KSN20 CAN network:

Another WS2812b VU Meter (Tiny version)

Hello friends!
About a month ago I bought several pieces of WS2812b LED strip. Why not make another VU meter?
I decided to make mini VU meter for single channel which can fit to CFL lamp base.

Cheap LED string rework (220VAC to 12VDC)

Hi friends!
Before New Year I've searched for a multicolor LED strings to decorate my home. But there was a problem. All strings at our stores must be powered from mains 220VAC. But there are some places at home without mains power outlets due to safety and 12VDC only. And the other reason is poor quality of most these products. Some of them are really dangerous and can burn without any visible reason.
So I decided to make some rework of a cheap LED string.

Click on any photo for full size.

60+60 series LED's work with 12VDC supply

Buck-Boost LED Driver (34063)

Hi all! Earlier this year I've made improved version of 34063 LED driver. This is combined buck-boost converter witout output voltage inversion. Now I have some time to describe it =)

Light for Dremel Workstation 220. New version.

Hi!
About two years ago I've made a work area lighting for my Dremel Workstation 220. Really simple  - 3AA batteries, resistor and a bunch of white LEDs (all in parallel) from broken flashlight. Not bad, but these LEDs have narrow light spots and large power consumption.

DC-DC Boost LED driver (based on MC34063)

New update of my DC-DC boost LED driver (full story you can see here (in Russian)). Added output overvoltage protection (D2,D3) and D1 changed to Vishay 30BQ100. Also I've added simple amplifier for current-sense resistor, so it can be now 1W (1 Ohm for 700mA LEDs, 2 Ohm for 350 mA).

Inductor: 60 turns of 18AWG copper wire on T90-52 core (I've used inductor from dead ATX PSU).

Please note: There is no short-circuit protection for output!

Some other notes.

• Overvoltage limiting 1W zener diodes D2 and D3 may be changed to single 0.5W zener for appropriate maximum output voltage. For example BZX55C47 for max. 47V output.
• Maximum output power depends on primary power supply maximum load capability, current sense resistor R1, MOSFET Q1, inductor coil and flyback rectifier D1.
• This circuit cupports max. 16V input (limit by MOSFET driver).
• NCP3065/66 is more suitable for CC LED driving (lower feedback voltage) but I don't have them now for test.