Make your own CNC router that lets your computer cut out the parts you’ve drawn in CAD! What maker WOULDN’T want this?
Plans are for a router with a 9″x24″x1″ cut area that can rapid travel at over 150 inches per minute with the HCNCPRO Driver Board Package using 127oz-in stepper motors at 35VDC!*
Hobby CNC Router Plans for 38% off – [Link]
This audio power amplifier project is based on LM1875 amplifier module from National Semiconductor. It is able to deliver up to 30W of power using an 8 ohm load and dual 30V DC power supplies. It is designed to operate with minimum external components with current limit and thermal shutdown protection features . Other features include high gain, fast slew rate, wide power supply range, large output voltage swing and high current capability.
25W Audio Power Amplifier - [Link]
This project provides the schematic and the parts list needed to construct a 3V FM Transmitter. This FM transmitter is about the simplest and most basic transmitter to build and have a useful transmitting range. It is surprisingly powerful despite its small component count and 3V operating voltage. It will easily penetrate over three floors of an apartment building and go over 300 meters in the open air.
3 volts FM transmitter – [Link]
In this Countdown Timer project, a 555 IC, a counter IC and a transistor switch to activate a relay either ON/OFF(mode selected by a jumper) as soon as the counting period is over. The circuit consists of an oscillator, a ripple counter and two switching transistors.
Simple Count Down timer Project – [Link]
This audio amplifier project is a class AB audio power amplifier using a TDA2003 module power amplifier. It is easy to construct and has only a few external components. The module is designed with short circuit and thermal protection. It can drive loads as low as 1.6 ohm and is capable of delivering over 10 watts from a 16 V DC power supply. Figure 1 shows the TDA 2003 packaged and pin configuration.
Simple To Build 10 W Audio Amplifier! – [Link]
This is the schematic for a very basic 10 LED chaser I built. I prefer my “chasers” to run more slowly than most people and used a 10 uF capacitor for C1. The 10K pot can reduce the flash speed from not moving to whatever minimum time constant is possible with the C1 value you choose. Don’t bother with ultra-bright LEDs for these “chaser” projects as cheaper, lower millicandela (mcd) LEDS work fine. I favor blue and green LEDS. The 4017 decade counter is a fabulous part and can be driven to flash a row of LEDs with a 555 timer chip or a discrete BJT multivibrator.
LED Chaser Using 555 timer + CD4017 counter! – [Link]
TI Launches video repository, interesting… [via]
TI recently launched a new video repository which really takes us to the next level in online video. This new system (which can be found at http://videos.ti.com) creates a one-stop-shop for seeing all the video content, High quality video streaming with full screen capability. Share functionality which will allow you to post the video right in the player to many popular social sharing sites. Email functionality which will allow you to email the video to friends who might also find it of interest. Embed codes which allow you to place the video on your own pages. But one of the key new items which we are now offering our customers is User Generated Video. If you make any videos about how to use TI products we want you to upload them to our site! Simply go to http://uploadvideo.ti.com and load your file! We’ll feature them on our portal and may even use your video on our website so others can use the information.
TI Launches video repository – [Link]
Switches and hits game @ Design news… [via]
Mark Rumreich built a puzzle for his nephew Nathan. After building a small version of the “Nathan,” he decided to ratchet up the stakes with the MEGA-NATHAN. The puzzle has a grid of 4×4 toggle switches on the face of a box. A puzzle pattern is set inside the box using a matching 4×4 switch grid. The back cover is then closed to conceal the solution from Nathan. When the front switches are set to the correct pattern, an internal buzzer buzzes, and Nathan wins. Problem is, there are 65,536 (2^16) possible switch combinations. So Mark devised a series of hints that alert Nathan to the correct solution path.
Switches and hits game – [Link]
For the absolute beginner it may be hard to understand what Voltage, Current, and Resistance are.Think of voltage as water pressure, current as the size of the pipe, and resistance as a valve or restriction in the pipe.
What is Voltage Current and Resistance – [Link]