Looking For Gadget Inspiration?

Me too.

I have a huge collection of all things Arduino – LCDs, touchscreens, cases, batteries, ICs, sensors, knobs, switches, wires and everything in between. And I can’t come up with a single thing to build and USE.

I’m not an academic hacker so I like to make things I need, or at least things […]

A Wireless Motion Sensor Array – Part 4


Yea, I thought the hard part of making these sensors was over too. Boy was I wrong. Prototyping on a board I could plug in to the wall was pretty easy. Going from zero to a working transmitter/receiver took a few hours over a couple of days and that was mostly because I’m a […]

A Wireless Motion Sensor Array – Part 3

You might be thinking that the project is finished and that you should take what we have already, slap everything in a box and start using it. Indeed, you could, but we need to talk about the most important thing of all : POWER.

Until now I powered both the receiver and the transmitter via […]

A Wireless Motion Sensor Array – Part 2

In part 1 I got the RF links talking to each other. In this part I’m going to wire up the PIR sensor so the alarm only goes off when it is tripped.

Upload this sketch to your transmitter Arduino (very, very close to the initial sketch) :

The only thing I added was […]

A Wireless Motion Sensor Array – Part 1

The goal of this project is to create portable battery powered motion sensors that I can use around my house and office with multiple receivers (one in my office, one in my electronics workshop, one up in the bedroom for night security). I’m even going so far as to put one on my front porch […]