Transistor Array

With the heatsinks you'd think it could handle a lot of power. Well... I tried to see how much current I could draw from one channel. I got 25 mA. One channel powered a motor easily, in previous tests. I'll have to try a few more things. It could be a less-than-ideal motor I used most recently. We'll see.

Color Organ Update

This video shows all three channels working. The left light is bass, the middle is mid-range and the right is treble.



The bandpass is still on the breadboard. The display you see is actually pulse-width modulation controlled by the signal from the filters.

To Do:
Put bandpass filter on perf-board.

set up transistor array.

Obtain potentiometers, switches, status lights and various other components.

Color Organ update

I have made progress on the color organ, finally.

I have tested the preamp, which is now passing the signal. I had to use a different opamp. I was originally using the LM1453, for the preamp I am now using the LM358P.

I have tested the high-pass and low-pass filters, they are working.

I have prototyped the band-pass filter, and it appears to be working.



Now I need to:
Test all filters on the transistors to make sure they are working correctly

Build the bandpass filter on the board and test.

Test Results:
Here is some video from the oscilloscope.

Color Organ status

The color organ board is mostly done, I haven't worked on it for a while, but the problem I am currently trying to overcome is an issue with the preamp.

I have tested the 3 PWM channels and they work.

I have tested the preamp, which is not passing the signal. [This is my current problem]

I have not tested the high-pass and low-pass filters

I have not built or prototyped the band-pass filter


I'm going to troubleshoot the preamp and see if I can get it working. More info when I have it.