While working towards enhancing the core functionality on my synth I’ve now had several moments when I thought “I wish I could split this signal”. Time to build a multi!
Now me being me - I cant just make something simple right off the bat!
Hopefully I can cram everything I want into a 10x20 panel.
Building on the concept of the Bat Meter I picked up this from ebay several months ago and figured it would be a neat little addition to a simple multi:
Since then I have come to the conclusion that I want to have more blinkie lights. Sadly the meter itself is not backlit and if anyone has any idea on how to pull that off, I would be super interesting in hearing about how to do it.
One of the downsides of the Bat Meter was that it struggles to keep up with the rapidly fluctuating voltages on a synth. My idea was to incorporate a pair of 10 bar LED displays. I am already stretching my knowledge technical knowledge here so I decided to look for any help I could get and came across these. These simple PCB’s seem to have everything I could need and more - most likely for less than I could source the parts individually. And they even come in blue and red. I imagine they could just be run off the output of a TL074 - but I’m not sure how to handle a negative value.
I’m not sure how useful it would be, but a over voltage LED of some sort so if I hit or pass +/- 12 volts might be interesting(?).
I also have a 4 position rotary switch…
…but I have the feeling it wont work for what I need. I would like to use it to select which of the four banks the LED bars, overcharge LED’s, and the voltmeter would monitor but I think I need a four pole.
Red/Blue bipolar LED’s seem to be a little more difficult to come by - the first vendor I found no longer delivers to the USA, but I did find this on ebay. Pretty much a lifetime supply if I decide to go for it as I only need four for my design.
I think in the end I’ll need 6 TL074’s (if I understand how these things work).
The last feature I would like is for my inputs to cascade. I know there is a eurorack multi that does this - if you plug something into the first input ALL of the outputs down the line receive the signal until you plug something into the second input, which feeds down to the other two and so on. I would LOVE to have this functionality but have no clue where to even start with it.
I’m still in the spitballing stage here - bring your comments and feedback please!