#1007 midimuso midi-cv

Right! its on its way, I figured id make the thread! this module took a bit of teething, so I’m sorry for the wait but surprisingly still keeping to a module a month!!! give or take a week here and there.

I’m putting together the documentation and videos etc for it today/tomorrow.

everything including the listing should be up on Friday. fingers crossed!!

it comes with the CV12 chip with slightly modified code including return to bass characteristics, defaulting on the mode 4 channel Mono, and also C as 0v (the standard actually has A as 0v), I bought a bulk from Midimuso and will include with the listing, and also it comes with the 2 4504’s as it was pointed out to me that they need to be Texas instrument ones, as other manufacturers 4504’s showed slightly erratic behaviour. so to save some head scratching I got a whole bunch of them too.

19 Likes

ahh super.

I think this will be an enabler for a lot of us that may have a suitable keyboard :slight_smile:

4 Likes

(or more likely, the design depends on undefined behaviour (I mean, we’ve already seen the rather creative use of a non-regulating LM317 in the original muso :smiley:))

EDIT: Wait, the reference schematics use MC14504, but that’s not a Texas component? Confused.

3 Likes

Thank the gods… this has been hanging on my wall for a while now :stuck_out_tongue:

7 Likes

I’m totally going to use my old ass Miracle Piano Keyboard lol…
Just need to disable its onboard speaker…

2 Likes

Oh we had one of those when genius son was a little boy. Had to give it away when we moved back from London.

2 Likes

yes sorry fredrik that schematic had the wrong component designation.

but yes that’s is also very true! I mean it doesn’t seem to. and to be honest I have not tried it with other brands and I may very well do so!± infact im going to order some and see what happens.

I may aswell see what midimuso is on about. before I question the voodoo gods!±!!

1 Like

a classic! the miracle piano ha

2 Likes

It’s up! https://store.lookmumnocomputer.com/collections/all/products/1007-midimuso-midi-cv-module-pcb-panel-chipset

5 Likes

Was all set to order a third VCO too, but it’s back ordered.

8 Likes

I’ll start a Tayda list

6 Likes

Yeah. I got the last one I think. For now. I hope more are on the way. The same for the mixer.

3 Likes

aaah sorry on the VCO’s! they are back next week! I hadn’t realised until a bit too late on those ones!!

Im pulling together a video on the midi module at the minute, it shouldd be up on Sunday, running through the build and calibration etc.

6 Likes

I think this covers it
https://www.taydaelectronics.com/tl431acl-tl431-precision-shunt-regulator.html
https://www.taydaelectronics.com/40-pin-2-54-mm-single-row-pin-header-strip.html
https://www.taydaelectronics.com/10-pin-box-header-connector-2-54mm.html
https://www.taydaelectronics.com/10uf-25v-105c-radial-electrolytic-capacitor-5x11mm.html
https://www.taydaelectronics.com/a-553-0-1uf-50v-ceramic-disc-capacitor-pkg-of-10.html
https://www.taydaelectronics.com/10-x-22pf-50v-ceramic-disc-capacitor-pkg-of-10.html
https://www.taydaelectronics.com/0-01uf-50v-80-20-ceramic-disc-capacitor.html
https://www.taydaelectronics.com/1uf-50v-radial-tantalum-capacitor.html
https://www.taydaelectronics.com/1n4148-switching-signal-diode.html
https://www.taydaelectronics.com/connectors-sockets/wafer-housing-crimp-terminal/serie-2500-2-54mm/wafer-connector-2-54mm-3-pins.html
https://www.taydaelectronics.com/connectors-sockets/wafer-housing-crimp-terminal/serie-2500-2-54mm/housing-connector-2-54mm-3-pins.html
https://www.taydaelectronics.com/connectors-sockets/wafer-housing-crimp-terminal/serie-2500-2-54mm/wafer-connector-2-54mm-2-pins.html
https://www.taydaelectronics.com/connectors-sockets/wafer-housing-crimp-terminal/serie-2500-2-54mm/housing-connector-2-54mm-2-pins.html
https://www.taydaelectronics.com/connectors-sockets/wafer-housing-crimp-terminal/serie-2500-2-54mm/crimp-terminal-connector-2-54mm.html
https://www.taydaelectronics.com/resistor-10-ohm-1-4w-1-metal-film-pkg-of-10.html
https://www.taydaelectronics.com/resistor-5-1k-ohm-1-4w-1-metal-film-pkg-of-10.html
https://www.taydaelectronics.com/resistor-220-ohm-1-4w-1-metal-film-pkg-of-10.html
https://www.taydaelectronics.com/10-x-resistor-100k-ohm-1-4w-1-metal-film-pkg-of-10.html
https://www.taydaelectronics.com/10-x-resistor-10k-ohm-1-4w-1-metal-film-pkg-of-10.html
https://www.taydaelectronics.com/10-x-resistor-1k-ohm-1-4w-1-metal-film-pkg-of-10.html
https://www.taydaelectronics.com/10-x-resistor-270-ohm-1-4w-1-metal-film-pkg-of-10.html
https://www.taydaelectronics.com/14-pin-dip-ic-socket-adaptor-solder-type.html
https://www.taydaelectronics.com/16-pin-dip-ic-socket-adaptor-solder-type.html
https://www.taydaelectronics.com/6n137-high-speed-logic-gate-optocouples-ic.html
https://www.taydaelectronics.com/tl074-quad-operational-amplifier-j-fet-pdip-14-tl074cn.html
https://www.taydaelectronics.com/14-pin-dip-ic-socket-adaptor-solder-type.html
could not find this on Tayda


alternate:
https://www.taydaelectronics.com/74hc14-7414-ic-hex-schmitt-inverter-high-speed-cmos-ttl.html

https://www.taydaelectronics.com/16-000-mhz-16-mhz-crystal-hc-49-s-low-profile.html
https://www.taydaelectronics.com/l78l05acz-l78l05-78l05-5-volts-100ma-voltage-regulator-ic.html
https://www.taydaelectronics.com/5k-ohm-trimmer-potentiometer-cermet-25-turns-3296w.html
https://www.taydaelectronics.com/10k-ohm-trimmer-potentiometer-cermet-25-turns-3296w.html
https://www.taydaelectronics.com/brass-standoff-spacer-screw-hex-male-m3x10mm-silver.html
https://www.taydaelectronics.com/nut-3mm-for-screw-m3.html
https://www.taydaelectronics.com/phillips-round-head-screw-m3-0-5mm-heat-sink-to-220-to-247-transistor.html
https://www.taydaelectronics.com/8-pin-2-54-mm-single-row-female-pin-header.html
https://www.taydaelectronics.com/2n3904-npn-general-propose-transistor.html
https://www.taydaelectronics.com/6-35mm-1-4-stereo-phone-jack.html
https://www.taydaelectronics.com/leds/round-leds/5mm-leds/red/led-5mm-red.html
https://www.taydaelectronics.com/resistor-100-ohm-1-4w-1-metal-film-pkg-of-10.html
https://www.taydaelectronics.com/tl074-quad-operational-amplifier-j-fet-pdip-14-tl074cn.html
https://www.taydaelectronics.com/14-pin-dip-ic-socket-adaptor-solder-type.html
https://www.taydaelectronics.com/tl072-low-noise-j-fet-dual-op-amp-ic.html
https://www.taydaelectronics.com/8-pin-dip-ic-socket-adaptor-solder-type.html

Tayda does not have the midi sockets, alternative:


or
6 Likes

Order is in :slight_smile:

I need to take stock of my build and testing progress. I have forgotten what modules are tested and fully working.

3 Likes

The 74HC14 should do just fine as it is capable of ±4mA and this circuit won’t use more than about 1mA.
https://www.taydaelectronics.com/74hc14-7414-ic-hex-schmitt-inverter-high-speed-cmos-ttl.html

7 Likes

I was hoping someone would chime in with that useful information
Thanks

1 Like

thanks Antoine! the all seeing eye!!!

3 Likes

The 74HC14 is fine for driving the MIDI THRU outputs.
image
Surprisingly it might be a bit marginal for driving the LED’s transistor, which pulls about (5-0.7)/1k = 4.3mA, but the 74HC14 is still better than the 74LS14 which is only rated for 0.4mA for a high output.
I would just replace that 1k resistor by 1.2K to be on the safe side. Shouldn’t affect the LED’s brightness significantly.

EDIT: I was going off the Texas Instrument data sheet, according to Tayda’s web page, the 74HC14 can drive ±5.2mA so it’s OK as-is with the 1K resistor. The 74LS14 on the other hand could use a 12K resistor… which would still probably give a plenty bright LED as the transistor would still be saturated.

4 Likes