Received my SparkFun order today, amongst the contents were the things I was seeking most, several 10k breadboard compatible potentiometers, three dual op-amps (LM358), three super bright 10mm LEDs (One red, green and blue) as well as a few other toys. The two biggest deals are the opamps and the potentiometers, while not strictly the right equipment, they're close enough that I can test my mixer
I showed earlier and see if the design works for 2 and hopefully 4 channels. If it does I do intend to order a PCB as well as the OPA2134 and audio taper slide pots in place of my linear taper rotary pots. Also, I am going to see about controlling the brightness of the Red, Green and Blue Super LEDs of Doom to make some kind of USB powered controllable lighting array for.... fun?
Mark McCurry stopped by to collect his part of the order and we soldered up our audio breakout boards, and put one of the pots to work as a brightness control while we played with the super bright LEDs. They were listed with a forward drop of 3.4V for the Green and Blue and 2.3V for the Red. I carefully connected the LEDs inline with a multimeter (visible in the attached photos and video) and made sure the voltage being delivered only corresponded to the sum of the drop voltages as I tried the LEDs in series, even so I probably should have had more resistance in place than the pot to limit current, but I was having too much fun to care :P. Don't be like me, protect your LEDs.
As usual (ok not really the usual since I never did this much before but I'm trying to now) you can find the photos in my Photo Gallery, links to the direct albums provided below!
Til next time,
MattLED Photo LinkMixer Photo Link