Jan 302011
 

To record my FPV videos I bought such 2.5″ DVR recorder on eBay:

There are no buttons on the recorder. All controls are done using the IR remote control. Dealing with the remote isn’t very handy out in the field, so I decided to add three extra buttons for record, stop and preview:

2.5" DVR with buttons2.5" DVR with buttons

Very simple: An AVR ATtiny25 generates the IR commands which are injected right after the IR receiver. All you need is just 3 push buttons, an ATtiny25 and one 1 KOHmresistor.

The ATtiny25 needs run on the internal RC oscillator with 8MHz, so fuses needs to be configured the right way.

Download the schematic and firmware:

Schematic 2.5" DVR Mod DVR_Mod.pdf Version: A
147.7 KB 221 Downloads Details...

Firmware 2.5" DVR Mod firmware.7z Version: A
1.2 KB 144 Downloads Details...

By the way, how my ground station looks right now:

FPV Groundstation 01/2011

The new 28 channel receiver combined with the modified 2.5″ DVR. Everything is powered by a 3S LiPo battery.