DIY Remote Control for Zoom H4n and Canon 60D
Within this project I developed a remote control for the Zoom H4n portable audio recorder and the Canon 60D DSLR camera. I want to fix a common problem lot of DSLR shooters have: Starting the camera and audio recorder simultaneously!
In my eyes there is problem with the H4n when using with a DSLR - You have to press the record button twice. Especially when filming events (e.g. wedding or birthday) the equipment has to be reliable. But with the H4n you can easily miss to tap the record button twice. As a result the sound partly or completely is missing.
The remote control prototype circuit connected to Zoom H4n audio recorder.
As said this project shall fix the problem. The goal is to develop an control circuit (like a remote control) that starts the H4n and the Camera (in my case a Canon 60D) with just on button. The requirements are:
- Small as possible to be able to put the remote control on the camera body.
- Indicator LED for record
- Clipping indicator
- Optional: AGC with Step-down und Step-up (Note: I decided to skip this point)
The prototype circuit in action.
H4n Remote Protocol
The protocol is RS232 with 3,3V level at 2400 baud 8n1. Marcus Wolschon has already decoded most parts of the protocol. For further details please see his blog.
|Button||Byte 1||Byte 2|
|Line 1 red||0x04|
|Line 2 red||0x08|
|Line 1 green||0x20|
|Line 2 green||0x40|
Before H4n will reacts on commands from a remote control a registration sequence is needed.
|RC4*||0x00||Send until H4n sends response.|
Pinout of H4n Remote Jack
Controlling the camera (Canon 60D)
The easiest way to control the camera is through a IR remote control. The protocol is simple and available in the internet. The good with IR is - it works for other canon cameras (e.g. ti rebel / D500) too.
Creating the Circuit
Please see german version for further information until this page is getting updated.
The DIY remote control