Caleb’s self checking letterbox is proof that simple designs and minimal parts can be very effective.

“I really didn’t enjoy having to check the letterbox when it was raining – especially when it was raining hard. That’s when I had the idea to make a self checking letterbox. This invention would also be helpful for disabled and elderly people to save them unnecessary trips to the letterbox.

The best part of this project was being able to build up my knowledge in electronics. I also became more confident in building projects and troubleshooting.

The most challenging part of developing my project was when the prototype circuits would not work, especially after soldering them onto the circuit board. This meant I lost a lot of time. Also, sometimes the circuits would work on the breadboard but not when I soldered them onto the circuit board. It was really frustrating.

I have been a Bright Sparks member for a few months now. The thing I like best about being a member of the club is that I can chat with other electronics enthusiasts and discuss ideas, problems and solutions. This has been extremely helpful.

My dream job is to work in a big electronics company like Apple and develop new and exciting electronic products.

If I could invent anything it would be a functional transport device which works on renewable energy and is environmentally friendly.

After I finish Year 13 I intend to study electronics at Auckland University.”