Features:

• Simple, plug-and-play solution. Mount the volume knob to a panel in the car, solder two wires into your stereo's steering wheel control input and you are good to go
• Compatible with many headunit brands
  • JVC1
  • Kenwood2
  • Alpine
  • Pioneer
  • Sony
  • Android Headunits (solderless control via USB!)3
  • Any headunit with steering wheel control learning
• USB C powered. Most headunits have female USB connectors for you to plug this into and power up
• MCU: WCH CH32X035 with Arduino firmware support
• Interrupt-driven firmware results in a smooth, user-freindly experience
• Firmware updates via USB upload
• Fully open source hardware and firmware. This includes all design files, BOM, firmware, etc

1 JVC forces incremental volume control above certain values on select models. I am yet to find a way to bypass this.

2 Kenwood forces incremental volume control above certain values on select models. I have found a way to bypass this and have implemented it by default in the firmware. This may or may not work for your unit and your miles may vary.

3 Some Android headunits do not allow USB volume control. If that is the case with your unit, you can default back to using the resistance SWC mode of this kit for control input

RESWC Impact Map

Check out where our volume knob kits are in use around the world! >> RESWC Impact Map <<

Installer or Shop?

We are scaling and keen to work B2B as well! Let us know if you are interested with this short Google Form

What's in the box:

• 1pc Volume Knob Kit - includes controller board, encoder board and required connectors/cables

Optional Accessories:

• Black Aluminium volume knob cover/cap (large and small)
• 0.5m Braided USB C to A cable (data & power)
• 3.5mm jack pre-terminated SWC patch connector
• USB A Data & Power Splitter: The volume knob kit only requires power from the USB port (unless running in USB HID mode). Use the USB splitter to power the volume knob kit while also charging and running Android Auto or Carplay on your phone through just one port on your headunit

SWC Functions

Documentation and Source Code

• Compatibility List
• User Guide
• Video Demo
• Hardware Documentation and Source
• Firmware Source

Why did I make this?

• No kits like this exist: a plug-and-play solution to add a volume knob back into your car. Mount the volume knob to a panel in the car, solder two wires and you are good to go

My headunit does not have a USB socket to power this??

No worries, purchase an automotive 12V to USB adapter and plug this into it.

• Note: The 12V rail in cars is harsh. Do not cheap out on this component

Volume Orders

If you would like to purchase more than one kit, please get in contact with me! I am happy to provide a discount for volume orders and combine them into a single shipment :)

Shipping

Please note, the price of this item is exclusive of GST and/or VAT etc. Any import taxes and duties shall be born by the customer.

• Note: Only US shipping price includes prepaid tariffs (DDP) as this must be paid by me before shipping

Warranty and Returns

I will happily accept warranty claims for products that are DOA. If your headunit is listed as Compatible - Unconfirmed and it ends up being incompatible, I will also happily provide a refund. Buyer's remorse will not be warrantied or refundable.

FCC Compliance Statement

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

1. This device may not cause harmful interference, and
2. this device must accept any interference received,including interference that may cause undesired operation.