# Eurorack Chromatic Tuner

Chromatic Tuner for Eurorack system in 4HP

- **Seller:** [David Haillant](https://lectronz.com/stores/david-haillant), Dunkerque, France
- **Price:** €21.00 (EUR, before shipping and taxes)
- **Availability:** In stock
- **Categories:** Synth, Audio
- **Product page:** https://lectronz.com/products/eurorack-tuner

## Options

**Configuration**

- Partial Kit (PCB + SMD + Front Panel) - Arduino not provided (9 left)
- Full kit [Add €15.75] (1 left)
- Fully Assembled & programmed (max build time: 1 week) [Add €36.75] (2 left)

## Links

- [Documentation](https://www.davidhaillant.com/tuner-1-0/)
- [Code](https://github.com/dhaillant/Tune-O-Matic)

## Images

![Eurorack Chromatic Tuner](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NTMxOTcsInB1ciI6ImJsb2JfaWQifX0=--7c8a0c965ecbc329529d669479743de525b747cb/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/2024-04-20T14-18-31.915Z-2024-03-05-2011.43.46-20detour.jpg)
![Eurorack Chromatic Tuner](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NTMxOTgsInB1ciI6ImJsb2JfaWQifX0=--1f87a125bcc96f264f79c60735dc596f8e44ea6c/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/2024-04-20T14-18-31.915Z-2024-03-05-2011.24.38-20detour.jpg)
![Eurorack Chromatic Tuner](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NTMxOTksInB1ciI6ImJsb2JfaWQifX0=--65dd0d9d767fe8b0a6f68996e57d3d67c81080bd/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/2024-04-20T14-18-31.915Z-2024-03-01-2018.25.51-20detour.jpg)
![Eurorack Chromatic Tuner](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NTMyMDAsInB1ciI6ImJsb2JfaWQifX0=--af87cf3ded683abded20eb1efc04f88d569f8171/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/2024-04-20T14-18-31.915Z-2024-03-05-2011.45.16-20detour.jpg)
![Eurorack Chromatic Tuner](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NTMyMDEsInB1ciI6ImJsb2JfaWQifX0=--02f80be5442324a4e9490ea44f454e8ababbfeae/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/2024-04-20T14-18-31.915Z-2024-03-05-2011.44.13-20detour.jpg)
![Eurorack Chromatic Tuner](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NTMyMDIsInB1ciI6ImJsb2JfaWQifX0=--f6b72f29330e120356df57144223aa30f20bede1/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/2024-04-20T14-18-31.915Z-2024-03-05-2011.46.07-20detour.jpg)

## Description

# Tuner
**Tuner** is a Eurorack Chromatic Tuner based on the sub-circuit proposed by LMNC in his amazing
[Performance VCO](https://www.lookmumnocomputer.com/1222-performance-vco).

![Tuner module](https://www.davidhaillant.com/l/uploads/medium/bef13263c544728647d806eefbb22015.jpg "Tuner module")

The module is based on the Arduino Nano.
Its firmware is open source and can be found at [https://github.com/dhaillant/Tune-O-Matic](https://github.com/dhaillant/Tune-O-Matic).
The firmware has been improved, offering better accuracy and several options such as base tuning, different charsets, dimming, and more.

Check [https://lookmumnocomputer.discourse.group/t/tune-o-matic-tuner/36](https://lookmumnocomputer.discourse.group/t/tune-o-matic-tuner/36) for discussions around the circuit.


![Tuner module](https://www.davidhaillant.com/l/uploads/medium/a39df6858ffa04e5d1e5050ca526c179.jpg "")


The 7 segment display can be either Common Cathode (CC) or Common Anode (CA) and the jumper S1 selects which type of display is installed.

The 4 jack sockets are passively connected. This way, you can insert your signal on any connector, and get 3 (passive) outputs. So, even if you don't use the tuner feature, the module can still be used as a simple 1 to 3 passive multiple.

![Tuner module](https://www.davidhaillant.com/l/uploads/medium/080e38e68bd082761e746dba2cf80515.jpg "")

![Tuner module](https://www.davidhaillant.com/l/uploads/medium/a9cfc30c6f14412b47e591f2e097e1d3.jpg "")

![Tuner module](https://www.davidhaillant.com/l/uploads/medium/c116782a8fb1c0bcd736543fbf0ce4cf.jpg "")

**The PCB comes with pre-assembled SMD components**. You only need to solder the few remaining through-hole components such as the power connector, the display, the LEDs, the Arduino connectors and the jack sockets.

#### Specs
The module is 3U (Eurorack), 4HP wide, 30mm deep with an Arduino Nano.

Power requires +12V only at 65mA.

#### Documentation
Visit [https://www.davidhaillant.com/tuner-1-0/](https://www.davidhaillant.com/tuner-1-0/) for more informations.

You can find Tuner on [ModularGrid](https://modulargrid.net/e/electronic-things-and-stuff-tuner)

## Shipping policy

Orders are usually shipped within the week following purchase.
Smaller items (PCBs, assembled PCBs, and small kits) are sent in letter format (padded envelope), while larger items are sent as parcels.
Shipments within France and the EU are only tracked when sent as parcels.
Shipping to the rest of the world is available. Please contact me if you have any questions or concerns.