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Showing posts from April, 2015

Homemade Triggertrap remote trigger

I was reading an article about a Kickstarter project that failed miserably, and found out a company called Triggertrap. Their project failed but they were already selling remote triggers for cameras. Remote triggers are fun, they allow to control camera remotely……..

I have never owned a proper remote trigger, I have always used the time trigger function on my camera.
The remote costs around 42 euros but the app is free. So I thought it should not be hard to build my own remote that works with the app.

The schematic:

Well, ideally you should use optocouplers to separate the electric circuits, but I like to live dangerously.

It fits neatly in this little red box. Now I can take selfies 10 meters away.

Well really, quite useful thing while doing time lapse photography.

RFID experiments

Radio-frequency identification (RFID) is a way to use electromagnetic fields to send and receive data wirelessly. The system consists of two parts: reader and a tag.  Tags can be passive or active. I think the most popular are passive tags. Meaning, there are no batteries needed, the power comes from the reader. The reader constantly sends out an interrogation signal and when a tag absorbs the energy and powers up, it radiates back information from the embedded chip.

Then it divides further - different frequencies, generations, encryptions etc.

Also one popular part is NFC (Near Field Communication) which has better security and other improvements. Latest phones usually come with NFC read/write capabilities built in.  So you can pay with your phone or touch phones together to share information. A lot of possibilities.

RFID/NFC is quite popular in our commercial world.

Anti-theft – stores use it to stop people stealing stuff.
Tracking people - putting tags inside shoes to track people, some…