DIY HOW TO
Get flash to fully experience Pearltrees
"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.
How To DIY
Another clever trick from the world of electronics – Pulse Width Modulation is a simple method for controlling analog devices via a digital signal. It’s also a very efficient way to drive motors, lamps, LEDs, & more.
Etching solution is probably more well known as solution containing Iron(III) Chloride. This Iron (III) Chloride is probably very bad for our environment (it is) or toxic plus very acidic. (See Wikipedia here for more info.) 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).
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.
Dino Segovis from HackAWeek.com, 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. 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.
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.
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!
Dick Cappels' Project Pages Questions about projects on this site gladly answered. (Address is an image -please type it in.) http://projects.cappels.org/ Microcontrollers, Analog, RF, and all three mixed. Most projects can be assembled from readily available parts without the need for specialized equipment.
Details Category: Plugins Published on Saturday, 01 January 2011 00:00 Hits: 4525
The MPR121 is the second generation sensor controller after the initial release of the MPR03x series devices. The MPR121 will feature increased internal intelligence in addition to Freescale’s second generation capacitance detection engine. Some of the major additions include an increased electrode count, a hardware configurable I2C address, an expanded filtering system with debounce, and completely independent electrodes with autoconfiguration built in. The device also features a 13th simulated electrode that represents the simultaneous charging of all the electrodes connected together to allow for increased proximity detection in a touch panel or touch screen array. View Product Image <p style="text-align:right;color:#A8A8A8"></p>
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.