4 months ago I bought a new camera. A compromise between a tourist pocket camera and DSLR: Olympus PEN mini E-PM2. This camera has no build in support for time-lapse photographing. So, I bought this simple remote trigger for it (Hähnel HW 433 OL80). The list price was 69 Euros, but I got it for 25.. when I opened it up, I thought even 25 EUR (32 USD) is a little bit expensive. But, the camera has a proprietary connector, so maybe it was worth it.
**broken link removed**
Looks like the transmitter is very simple. Some kind of encoder chip with no markings and a very simple On Of Keying (OOK) radio transmit circuit (433 MHz crystal oscillator signal controlled with couple of transistors and passives).
I Measured the signal coming from the IC (pin 1, the left side of "273" resistor) to the radio circuit transistors. And, yes, the signal is also very simple.
**broken link removed**
The signal shown repeats as long as the trigger button is pressed. The signal is the Shutter trigger. There is also another signal for Auto focus (standard double-action button. Press half-way for focus and all-the-way for shutter trigger).
What I'm planning to do is to buy a cheap 433 MHz transmitter (any suggestions for good modules for this?) and build a wireless camera controller for time-lapse photographing.
I don't really have any specific questions. Just want to know if somebody has experience with DIY camera controls, or just cool ideas beyond simple time-lapse control. I will update this post.. I hope.
**broken link removed**
Looks like the transmitter is very simple. Some kind of encoder chip with no markings and a very simple On Of Keying (OOK) radio transmit circuit (433 MHz crystal oscillator signal controlled with couple of transistors and passives).
I Measured the signal coming from the IC (pin 1, the left side of "273" resistor) to the radio circuit transistors. And, yes, the signal is also very simple.
**broken link removed**
The signal shown repeats as long as the trigger button is pressed. The signal is the Shutter trigger. There is also another signal for Auto focus (standard double-action button. Press half-way for focus and all-the-way for shutter trigger).
What I'm planning to do is to buy a cheap 433 MHz transmitter (any suggestions for good modules for this?) and build a wireless camera controller for time-lapse photographing.
I don't really have any specific questions. Just want to know if somebody has experience with DIY camera controls, or just cool ideas beyond simple time-lapse control. I will update this post.. I hope.
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