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. Face recognition uses an eigenface method. Initial testing indicates an 88% successful login rate with no false positives. There are currently commercially available systems for face recognition, but they are bulky, expensive, and proprietary. MPR121 Touch Sensor Controller. How To DIY. 1394427.pdf (application/pdf Object) Online | 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).
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.
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. Finally, I discovered Instructables and got plenty of good ideas from others. Ninety percent of my parts were acquired from junk or unused stuff. It doesn’t look pretty but it’s solid and works. Indeed, this is one amazing DIY CNC project I can highly appreciate, watch the video of it in action if you don’t believe me: And if you want to build yourself one, hit up the Project Page link below. via hackaday, Project Page. World’s Smallest DIY USB PC with HDMI Output! How to Make a DIY Amplifier for Less Than $20!
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. 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. And yes, there’s great free e-book you can read, it’s in comic so you might enjoy it. – Download here. via hackedgadgets. How to Make a Low-Cost DIY Eye-Movement Detector! Need to add eye-movement detector for your next project? 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. As the eye moves the negative pole moves relative to the face and this change in the dipole potential can be measured on the skin in micro volts. To translate this voltage into a position, two sets of electrodes are used to measure the differential voltage in the vertical and horizontal direction, on this project, however, just horizontal movements are recorded. Here’s a demo of his DIY eye-movement detector: via make, Luis Cruz’s Website.
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. (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.
My hope is that you will these projects helpful, and at least be able to make use of some of the bits and pieces you will find among them Test and Measurement Voltage Recorder With Playback (ATMEGA48V) A Simple Attenuator And Preamp For DC Measurements (Analog Only) An Even Better LC Meter Based on Atmel AVR ATTINY861 A Pretty Good LC Meter Based on an AVR (ATtiny2313, AT90S2313) A Simple Manual Curve Tracer (analog only) A Photocell Amplifier for Comparative Light Measurements (analog only) A 10 Bit LED Digital Panel Meter With Auto Ranging Based on ATMEGA 8 ATMEGA8 An Isolated Variable AC Mains Transformer 1.000 kHz Sine Wave Generator ATTINY2313/AT902313/ATMEAG8515/AT908515, etc.
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. 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.
The dangling arm is actually a strobe light that can be directed at those photo-resistors for some extra-glitchy triggering. Finally there's an effects section, with overdrive, fuzz and ring-mod effects. [via MAKE]