If you have a digital camera you probably noticed that in many cases remote control for it is a “must have” thing. Prices as always are high especially when you know that there is nothing special in to that. So the end option is to build one by yourself. Pushkarov took a MSP430 G2231 microcontroller and build using simple schematic. MCU simply controls IR LED through transistor key. Single button triggers the action.
It is assembled on protoboard and is powered from coin sell. Microcontroller is in DIP package, so it was easy to flash using TI launchpad. It really takes no time to build, but may help a lot.