Cycling aimlessly around Bangkok, I came across this street side stall (more of a table actually):
I stopped to see what was on offer and came across this old NEC DCR-60-1/780060…
… and all of the buttons reminded me of my friend Pavel’s Pocket Operator (by Teenage Engineering) musical gizmo, and thought that once gutted and innards reassembled, it could be used to make a sequencing musical beat doodad…
Continue reading Loadsa buttons!
Module list for my synth…
Continue reading My Synth
As original working gameboys are so expensive, how much would it cost to make one from parts?
Well, it’s not that easy. Unfortunately there is no source for new LCD screens (source). They have to be taken from donor DMG-01 units.
Continue reading Gameboy – by parts
How many ways are there to connect the three terminals of a potentiometer to a PCB and which is the cheapest..?
Continue reading 3 pin leads and connectors
Following on from VCO madness, here is a ADSR package, the CEM3310, from the same Curtis Electromusic Specialities stable as the CEM3340/5…
Continue reading ADSR madness
Sort of following on from VCO madness, I was really looking for the Super Simple VCO (which seems to be actually a 555 timer as a VCO, see the GetLoFi LFO in Ha Ha Ha… 555 fun). However, I got distracted and ended up analysing PSUs and buses for synths.
For ease, in order to power my synth, I had been planning on using a couple of single rail 12V SMPS designed for LED lights, in order to make a dual rail supply, but I started to wonder about the noise implications – as all designs for synths appear to use the old fashioned transformer, rectifier, and linear regulator approach.
(As an aside, Julien Ilett also points this potential noise (as related to buck convertors and SMPS) issue out in Julian builds: a Split Voltage Power Supply (+/-12v and 5v) @5:20. See also, Julian’s Postbag: #85 – E.Ink, Spring Onion, Split PSU (@7:33-8:00), where he mentions that high frequency noise is not removed by the linear regulators in the Split Rail Power Supply Kit Build – SEPIC Cuk Topology).
Continue reading Synth Power Supplies
Following on from Veroboard and the Sequencer bus described in Sequencer notes, the sequencer bus consists of two separate stripboard designs:
- The first step, and;
- The second step (and subsequent)steps), which all use the same board layout.
With respect to the 9T24H (9T25H) board used for the “Second (and subsequent) Step Sequencer Bus v0.9″… as there are 9 of these boards for the 2-10 potentiometer stages for each sequencer (10 step) stage, is it not more economical to combine on one larger board, of n x 9 Tracks?
Likewise, the v0.7 of the First Step Sequence Bus, requires 12T30H, will that not fit multiple times on a larger size board?
Continue reading Veroboard dimensions