In the 70s of the last century I built a light organ with 4 channels in about the same way as the design of Xkitz.
This time I will drive the optocoplers with five Mosfets and a power supply of 12 V 10 amp five super led strips of 6 feet in different colors.
Thanks also for the diagram.

I'm familiar with electronics, but this was my first complete kit using small components. With the right solder station, there is no problem. I haven't fired it up yet, but the quality is there. It seems well though-out. I'm building an old fashioned 5 watt bulb box using C7 Christmas lights, so this is perfect. Thanks!

I put together one of these kits in 2018. It's still going strong today. What a fun kit to put together. Use up to 2.2 led watt max on one circuit at a time. I also have multi SPST switch for each circuit run, so far 15 switch for 3x5 different color light arrays. Just be creative with the use of ohms law. You can take a simple circuit and make it into whatever your imagination can create.

Excellent, easy to follow schematics and assembly.

I recently purchased two 5-ch light organs with corresponding control panels. Today I tested the first one which I managed to assemble in approximately 5 hours. Four of the outputs worked as intended, with the fifth permanently lit. Using the fault-finding guide and referring to the schematic I found a poorly soldered resistor from the 12V supply to pin 1 of the opto-isolator. I am pleased to report that I am now a proud owner of one self built Xkitz light organ. I am not a novice, but advanced years and shrinking of components do necessitate the use of a magnifying glass nowadays. During assembly of the main board I used dil sockets for the ic's instead of directly soldering them in, as a precaution should I have had a major problem.

I have one minor criticism; the pads to the multiplug J1 on the control panel would have been better had they been extended an extra half a millimetre at each side, the size of which currently do pose a soldering challenge. In conclusion, the Xkitz light organ is a nice project and it works very well.