Category Archives: sensors

Tutorial on the NRF24L01 2.4 Ghz transmitter

I wanted to bookmark this write-up cause these boards are cheap, and a good way to add wireless comm’s to an arduino project.  BUT…not alot of good info out there about them. http://www.instructables.com/id/Wireless-Remote-Using-24-Ghz-NRF24L01-Simple-Tutor/

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Make a PIR Sensor Board

So did you pick up some PIR sensors at RadioShack when it was going down? If so, here is a nice circuit design to use them with an arduino. http://www.instructables.com/id/Make-an-Simple-Motion-Sensor-Board-PIR/

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simple low water level…I wonder if I could modify this for a pool

Nice simple design where once the float goes down low enough, it trips a sensor indicating low water level in a coffee machine…I wonder if I could adapt this for a pool… http://www.itcamefromtheworkshop.com/2013/04/low-water-indicator-for-my-rancilio.html

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RPi + Etekcity remote power outlets = Wireless controlled outlets

I was thinking of doing this myself.  But they guy beat me too it.  He uses a Raspberry Pi to controll the Etekcity remotes (run over 433 MHz RF) and an transmitter/reciever module to controll them.  He figured out the … Continue reading

Posted in Cheap, RaspberryPi, sensors | 1 Comment

Poor mans IR receiver

I like this idea, the author basically takes a cheap IR LED, some resistors, and one of the A/D lines on the arduino to read IR traffic.  This could be a good way to re-use old IR remotes from TV’s … Continue reading

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Instructions on err…building an adult toy

I knew it would happen sooner or later.  Someone would write up and publish designs for sex toys on instructables.  That aside, its an interesting write up combining 3D printing with internal motors an an arduino controller. http://www.instructables.com/id/Make-a-Mod-v01-Vibrating-Sensing-Open-Hardware-Per/

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Making a simple contact switch with a clothespin and wire

Nice simple idea for a switch, could make a good kill switch too with a piece of paper between the pins.  Pull the paper out and switch is on. http://www.instructables.com/id/simple-normally-closed-switch/

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automatic vent shutoffs with arduino (ish)

A father/daughter team basically built a system that is like NEST but for your heat vents.  So it will shut off/open vents as needed, thus saving the costs of heating/cooling your entire house.  Its using some arduino like clone for … Continue reading

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Using a pressure sensor on an arduino

Actually a pcduino, but this could apply to regular arduinos.  Its a write-up and sample code on how to use a basic pressure sensor.  Worth looking at if you are starting out with the stuff. http://www.instructables.com/id/Use-pressure-sensor-on-pcduino/

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Poor man’s 3D scanner

I had to laugh at this one, the author converted a bike wheel to spin the image around while the camera takes pictures.  Good idea, and simple (thought I would put a motor on the wheel and tie the camera … Continue reading

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