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FaceAccess. "A standalone face recognition access control system" project soundbyte We created a standalone face recognition system for access control. Users enroll in the system with the push of a button and can then log in with a different button. MPR121 Touch Sensor Controller. How To DIY. 1394427.pdf (application/pdf Object) Circuit Skills: PWM (Pulse Width Modulation), sponsored by Jameco Electronics. Circuit Skills: PWM (Pulse Width Modulation) How to Make Non-Toxic DIY Etching Solution! If you have kids in your house and you like to etch your own PCBs, having too much of this toxic, etching solution is probably not a smart idea nor is it great for the environment everytime you wash it down the toilet (or sink).

How to Make Non-Toxic DIY Etching Solution!

Now, there’s a better, environmentally-friendly way about doing your PCB Etching, that is by making your own DIY etching solutions, and I am not talking about this one where it uses hydrochloric acid, which is still bad. Stephen Hobley, a gadgeteer/circuiteer of all sorts, has just found out that you can substitute all the toxic acid for white vinegar.

His DIY etching solution basically consists of slightly diluted vinegar, hydrogen peroxide, and salt. The important thing is that you get the copper to precipitate out, as the dark “rust” – if the liquid is just turning blue then this is not the reaction involving the salt – just the other two ingredients. This works too, but takes a long time. CNC DIY – How to Build your own DIY CNC! Just when you thought you had to throw away all your spare parts (and even PVC pipes), someone hits you in the head (perhaps God, Budda, whatever), and you realize that you can make an absolutely, simply-amazing DIY CNC machine.

CNC DIY – How to Build your own DIY CNC!

Cssshop, member of Instructables says about his new DIY CNC project: I’ve always dreamed of having a CNC and window shopped all the time on the internet. World’s Smallest DIY USB PC with HDMI Output! How to Make a DIY Amplifier for Less Than $20! Dino Segovis from, has put an excellent tutorial on how to build your own DIY Amplifier for less than $20 with LM386 chip and parts bought from RadioShack.

How to Make a DIY Amplifier for Less Than $20!

As you can see in the video below, this 1/2 watt DIY amplifier is pretty powerful little amp, all encased in an altoids tin. This small amp even has a guitar jack and ability to distort sounds, pretty darn impressive for a small circuit. I think this is a great, simple circuit for those of you who want to build your amps. In fact, I will have to try making this very amplifier soon. via hackaday. DIY Geiger Counter Kit! How To Solder! [Free E-Book] Personally, I never took any classes to learn how to solder, I’ve been doing it since I was 7 years old.

How To Solder! [Free E-Book]

Well, I didn’t have steady hands back then but overtime, my hand has gotten steadier also I know a few tricks here and there. One of those steady-hand tricks is to use your pinky finger as base, so make sure your pinky finger is touching the ground while you solder if you want steadier hands. Other than that, you just need to get the hang of using “just the right amount” of solder and your soldering iron is at the right temperature. The worst is if you use too much solder and then it gets very messy. Start with small amount of solder and try to see if you can melt the solder really quickly and apply to target area. How to Make a Low-Cost DIY Eye-Movement Detector! Need to add eye-movement detector for your next project?

How to Make a Low-Cost DIY Eye-Movement Detector!

Check out what Luis Cruz (a senior in high school) did, a low-cost DIY eye-movement detector. This is amazing, not only that he was able to do it for low cost but this kid is simply GENIUS! The human eye is polarized, with the front of the eye being positive and the back of the eye being negative. This is caused by a concentration of negatively charged nerves in the retina on the back of the eye. Amazing Lasers! - New 007 Laser Weapon - Revealed! NerdKits - learn electronics with our educational microcontrolle. Electric projects. Dick Cappels' Project PagesQuestions about projects on this site gladly answered.

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(Address is an image -please type it in.) Microcontrollers, Analog, RF, and all three mixed. Most projects can be assembled from readily available parts without the need for specialized equipment. MPR121 Touch Sensor Controller. Details Category: Plugins Published on Saturday, 01 January 2011 00:00 Hits: 5531.

MPR121 Touch Sensor Controller

MPR121 Product Summary Page. DIY Electronics. Arduino - HomePage. DIY Drone Machine synth with arcade control. There's little that excites us more than a DIY synth, but slapping an arcade-style joystick onto a fuzzy, glitchy, beeping analog monster practically pushes us over the edge.

DIY Drone Machine synth with arcade control

Synth-master Unearthed Circuits has combined four oscillators with various levels of pitch adjustment and come up with Drone Machine; the joystick individually mutes or activates each one. Pitch is either controlled by the cluster of retro knobs in the lower left-hand corner, or can be thrown over to the bank of photo-resistors up near the top.