Leaderboard

This is a general interest/info post for a new(ish) CV concept. The green PCBs are 4 channel AOUT and AIN boards. Either one stacks with one blue "Control" board. AOUT: MAX525 based. I realise that @Altitude also has an AOUT in the pipeline, so I want to explain the pluses for both. @Altitude 8 channel more compact (minimum rack real estate) DOUT onboard lots of clocks and triggers US shipping @latigid on more spacious (a bit more ergonomic) switchable ranges (0-5, 0-10, +/-5V) manual fine tune control through hole assembly (no fine pitch SMT) new amplifier circuit with precision references and compensated outputs EU shipping matching panel design with AIN (see below) Status: I have most of the parts on hand, so this should be tested within a few weeks. AIN: switchable ranges (0-5, 0-10, +/-5V) to optimise ADC levels protection against overvoltage (op amp limiting) attenuator -- can set to clip the op amp input for interesting CV shapes! normalisation of the inputs to +5V -- can use pots as manual CV sources 3v3 power from a Core or an onboard Vreg Status: tested as working from an older proto. Waiting on a few parts to complete it. Control: Eurorack compatible Accepts either "Thonkiconn" (PJ301M-12) or PJ301BM jacks 4 channel AOUT or AIN 4 channel gate/trig/clock with LED LEDs are driven from a Schmitt trigger so shouldn't interfere with your power rail 1 clock can be set as an input with CV protection and conditioning (even works with a sine wave!) this conditioned clock can be sent to a Core e.g. MBCV DPDT (7mm) switches to engage the range functions: switch in a resistor to adjust gain settings switch in an offset for bipolar operation (you could have +/-2.5V or even +/-10V if desired) Duo LED to indicate current CV range configurable adjustment pots fine tune with diode deadband for AOUT attenuator for AIN note: the 9mm Alpha pots fit, but I have some "long shaft" versions on order. They have a knurled shaft and pointer which doesn't require a knob. mounting for a DOUT R5 board (see below) Status: needs to be tested with the AOUT and AIN boards, but the mechanical fits look okay. ^^ just thrown together, I suppose shorter standoffs would be possible. My design goal for an MBCV example is 2*AOUT and 2*AIN: 8 CV out 8 gate 8 CV in 7 clock out 1 clock in You'd have 200mm of PCBs, which is around 40HP of Euro space. I expect boards could cost 5-6 EUR each.

The Sequencer is finally up an running in his new Acrylic case ... Todo's ... adding a 5 Volt external PS for the STM32F4 instead of USB-cable and building the Frontpanel for the Line-Driverstuff

midiboxng