MATRIXSYNTH: RH Electronics


Showing posts with label RH Electronics. Show all posts
Showing posts with label RH Electronics. Show all posts

Saturday, May 22, 2021

RH Electronics Prophet 5 Voice block diagram


video by RH Electronics

"More information on the voice and modulation routing signal paths.
This has Poly Mod similar to the original prophet 5, wheel mod and LFO."

See the RH Electronics label below for more.

Monday, May 17, 2021

RH Electronics Prophet 5 style - SSI2144 filter talk


video by RH Electronics

"This is a little bit more information on the filter board, using an SSI2144 clone of the SSM2044.
The daughterboard has it's own VCA, mixer and summers etc so another board could easily be made to add a different VCF to the synth, such as the 3320"

Sunday, May 16, 2021

RH Electronics Prophet 5 style - Quick better sound demo


video by RH Electronics

"Recorded direct to the digital recorder, a better sound demo of the synth on one voice. Drum loop just from youtube."

See the RH Electronics label below for more.

Saturday, May 15, 2021

RH Electronics Prophet 5 Style - First Test (with a little sound)


video by RH Electronics

"First sound test on the Prophet 5 style synth.
I've just made up some analog parameters so it is difficult to test fully.
Oscillators not quite tuned together yet either."

Monday, May 10, 2021

RH Electronics Prophet 5 Style PCB - A little more info


video by RH Electronics

"Just another talk through of the PCB now I've built up a voice. Partly tested and working.
Oscillators oscillate and every chip has the correct power supply, which is a very good start!"

See the RH Electronics label below for more.

Saturday, May 08, 2021

The biggest PCB RH Electronics ever designed - Prophet 5 style main board


video by RH Electronics

"The main board for the Prophet 5 style project. This board is the main oscillator/signal switching and envelope generator. The filter will sit on top on a daughterboard."

Monday, April 26, 2021

Positve and negative voltages for synths etc


video by RH Electronics

"Just a quick talk about what positive and negative voltages are. And why I'm using 15 volts for a synth."

When 11 is not enough.

Friday, April 23, 2021

RH Electronics Mono Ultimate final decisions and first schematic


video by RH Electronics

"Final decisions on the Mono Ultimate synth a look at the first schematic.
Still some work to do but the design is set.
Dual 3340 oscillators, Prophet 5 style modulation"

Saturday, April 10, 2021

Muse Hysteria Bass on RH-1 Synthesizer


video by RH Electronics

"This is a sound demo of the synth more than my ability to play the riff. It may not be accurate, or in time. It took a few takes!
The bass riff sound is produced on the RH-1 board with no external effects"

Sunday, April 04, 2021

RH 1 Synthesizer boards are ready


video by RH Electronics

"Information here, documentation and schematic
https://rhelectronics.co.uk/new/rh-1-...​"

"The RH-1 is a digitally controlled (DCO) Synth based off the Juno 106 design. It will be available as a kit to build allowing the user flexibility of a desktop unit or rack mount unit.

It’s a mono synth with programmed ‘key rollover’ if a key is held down and another pressed it will change the pitch and re trigger the envelope.

Specification

Single Digitally Controlled Oscillator, Saw + Pulse (PWM Adjustable)
Single ADSR analog envelope (AS3310)
PWM and Filter envelope mod, adjustable
External inputs for Filter and PWM summer
0 to 5 volt analog CV
12 volt digital CV
AS3372 signal processor
Envelope re-trigger on second key press
Adjustable audio out ~650mV p-p
PIC16F18344 controller running with a 4MHz crystal oscillator
Power requirements are +/- 12 volts. A standard eurorack connector will be on the PCB"

Monday, March 29, 2021

RH-1 Synth build and description


video by RH Electronics

"Build montage and description of the RH-1 Synthesizer PCB.
Synthesizer all on one PCB"

Wednesday, March 17, 2021

RH-1 Single Board Synth - PCB prototype


video by RH Electronics

"This is the RH-1 single board synth PCB prototype.
Next to build and test!
This is running a DCO similar to the Roland Juno 106"

Monday, March 15, 2021

RH Electronics: How I tune the 3340 VCO


video by RH Electronics

"This is how I tune the VCO, not how 'to' tune the VCO. My method works, but there may be others.

Power supply is critical (I can't say that enough!) I recommend a -5V supply rather than the internal zener."

Thursday, February 18, 2021

Introducing the RH-1 DIY Analog Synthesizer


video by RH Electronics

RH-1 Synthesizer Sound Demo

video by RH Electronics

via https://rhelectronics.co.uk/new/products/

"The RH-1 is a digitally controlled (DCO) Synth based off the Juno 106 design. It will be available as a kit to build allowing the user flexibility of a desktop unit or rack mount unit.

It’s a mono synth with programmed ‘key rollover’ if a key is held down and another pressed it will change the pitch and re trigger the envelope.

Specification

Single Digitally Controlled Oscillator, Saw + Pulse (PWM Adjustable)
Single ADSR analog envelope (AS3310)
PWM and Filter envelope mod, adjustable
External inputs for Filter and PWM summer
0 to 5 volt analog CV
12 volt digital CV
AS3372 signal processor
Envelope re-trigger on second key press
Adjustable audio out ~650mV p-p
PIC16F18344 controller running with a 4MHz crystal oscillator
Power requirements are +/- 12 volts. A standard eurorack connector will be on the PCB

Disclaimer
This is a DIY kit, and is not being sold as a ‘product’ it is up to the end user to build and test. RH Electronics accepts no liability for any damage that may occur to the end product or any external device. It is the responsibility of the builder to provide a suitable power supply in line with the specification. All efforts have been made to stop interference with any other device, however being a kit it is not possible to test due to differences in build.
All boards and components that are suppled are RoHS certified and proof of this can be downloaded with the product files."

Sunday, October 21, 2018

RH Electronics Analog Synthesizer - In depth look part II


Part II added here.

Saturday, October 20, 2018

RH Electronics Analog Synthesizer - In depth look


Published on Oct 20, 2018 RH Electronics

Sunday, October 14, 2018

DIY 5 voice analog synthesizer - Now working


Published on Oct 14, 2018 RH Electronics

"Here is the (almost) complete 5 voice analog synth that I have been building for the last couple of months.
It's finally working, just a few tuning tweaks and features to add, but otherwise it's good to go.

The next videos will be a more in depth look at how it all works together."

Thursday, September 20, 2018

RH Electronics DIY Synth Update III


Published on Sep 20, 2018 RH Electronics

"Where I am at with my 5 voice synthesizer.
All boards are done and kind of tested, It's all been done modular but will only properly work together."

See the RH Electronics below for more. The case reminds me of a Sequential Prophet-5 case.

Sunday, August 19, 2018

RH Electronics Synth Noir - Modular Update


Published on Jul 18, 2018 RH Electronics

All finished so far, still modules and things to build.
The synth has
MIDI to CV
VCO
VCF
VCA
2x ADSR
and the 16 step sequencer

RH Electronics 5 Voice analog synthesizer - Major update


Published on Aug 18, 2018 RH Electronics

"It works! Well one voice does on breadboard.
Up and running are 2 oscillators (CEM3340 based, but using AS3340)
These go to a 4066 switch then the waveforms are mixed, so you can switch on all of them on both oscillators.

The oscillator is based on the Prophet 5 circuit, the voice chip is a CEM3372, which was £35 but worth it, as it has everything, 2 inputs voltage controlled mixer, a low pass filter with cutoff/resonance and a VCA

Then an envelope generator to control the filter and amp (test just the amp)

So one full voice will need
2x oscillators
1x Signal processor
2x Envelope generators
1x CV mixer for the envelope and cutoff (filter only) and LFO CV

Microcontroller will feed SPI DACs that will be the voice and control CVs, but then all the voice circuits are analog."
NEXT PAGE HOME


Patch n Tweak
Switched On Make Synthesizer Evolution Vintage Synthesizers Creating Sound Fundlementals of Synthesizer Programming Kraftwerk

© Matrixsynth - All posts are presented here for informative, historical and educative purposes as applicable within fair use.
MATRIXSYNTH is supported by affiliate links that use cookies to track clickthroughs and sales. See the privacy policy for details.
MATRIXSYNTH - EVERYTHING SYNTH