Pro Audio Design Forum

Thanks for posting this... Interesting, but as far as I can see this IS NOT the same mechanism as the phase splitter schemo also posted. The latter example uses the well known JFET mechanism where a fraction of the source voltage (usually 1/2 or -6dB) is introduced back into the gate voltage to crea...

but what if the previous use was to make a hat?

JR

With RGB LEDS, just set up an X by Y matrix and make a color TV picture...

JR

You'd need to MUX it one more time... they are muxing the three colors by 9 columns, but 18 rows of LEDs are all in parallel. They also use pretty crude direct dive, with discrete buffers... I push serial data to driver/latches. While I only address 3x12 LEDs in my current piece., or 4x16 in that co...

It's been a while since I remarked on the decay surrounding me. I finally fixed my lawnmower that was giving me a really obscure hot restart problem. Namely it could be real hard to re-start when hot. I finally tracked this down to high impedance (low current) leakage resistance draining current fro...

cool... I don't care about dimming, but I need my lumens...

JR

I met him back in the '70s when we used his semi-custom IC technology (Interdesign) at a company I worked for. I actually never used a 555 in a commercial design, while it was a clever early IC. It wasn't quite fast enough to make clocks for studio flangers, and simple timers could be rolled from CM...

I have been kicking around the idea of making an universal meter chip based on a microprocessor... It is almost easier to make a big meter effectively than a small one. The rap against the 3.3V micro family I like is that they don't look like they can drive bare LEDs adequately, but i suspect modern...

Back when I designed dynamics processors (a long time ago), I oriented VCA status meters to indicate gain reduction going down, and gain boost up. Of course this was in an odd-ball full range compressor that boosted low level stuff that was below threshold, and dropped high level stuff that was abov...

Road trip to "south by south west" nest year... Agreed change is always a little scary, and disruptive if you have a business. These days with so much internet based work, anywhere in the US with DSL could work... Unless you fly a lot, access to a major airport is not that important. Good ...