Null-A: 42HP or stand-alone synth

This is a custom design for a local university to be used for teaching analogue synthesis, nearly done!

It has a pre-amp, Envelope follower, 8 stage sequencer with forwards/backwards control, clock divider - /2,/4,/8,/16, 2 EGs, 2 VCAs, 2 LFOs with a difference rectifier, VCO with PWM and a VC processed sawtooth out, Arp4023 VCF, 3 input mixer and a headphone amp. The cutout is for the 1/4" socket to feed the pre-amp & EF

numberwang!

thenormanconquest

Some nice DIY builds from thenormanconquest

329 Phase Flange

These are ready to ship.
PCB = US$20
Panel = US$25
assembled =  US$220
10 stage Phaser/Flanger based on the Aries 329. It has 11 matched NPN pairs (BCM847) and a set of matched FETs. It is actually quite simple to match FETs, a circuit will be given in the build guide. Pretty much all surface mount, not suitable for beginners!



And a nice demo from Modular Addict, who supply full kits for these

1050 Mixer Sequencer

These are ready to ship. More info HERE
PCB = US$22
Panel = US$30
assembled =  US$220

Jono's build guide (VERY useful)

Brain Custard

Brain Custard - 9 audio rate chaotic signals mixed to form 'neuron clusters' The idea is low frequency patterns will emerge from the mayhem. Really it will be vaguely controllable noise and lots of it.....with LEDs

1050 mixer sequencer panel

will be here in 3 weeks