PCB Order | DorkbotPDX Instead of a weekly order, 2 layer circuit boards are now sent to the fab when the panel fills up. This means panels are going out 2 to 3 times a week instead of just once a week. Contents New ordering website! OSH Park! 4 layer orders are now every two weeks. I'm planning another beta 2-layer medium-run order on April 1st, 2013 for people that want at least 150 square inches of their boards. Order Status Keep up to date on the order status updates and to be notified of when the next order will go out: What is this? I've been coordinating a group circuit board order. It's $5 per square inch for three copies of your two layer design. Your two layer boards will be shipped within about 14 days of the order date. For four layer designs, it's $10 for three copies. Four layer boards will be mailed within 16 days. Who's eligible Although this was started primarily for the DorkbotPDX community, it's open to any hobbyist anywhere. Your order helps us continue doing it! What you get The Costs Help! Enjoy!
A Homemade Variable Tuning Capacitor for tuning in your FM stations... Would you like to make this site your homepage? It's fast and easy... Yes, Please make this my home page! Don't show this to me again. A 'Multi-Turn' Homemade Variable Tuning Capacitor... A remarkably simple homebrew device for tuning in your FM stations! From a range of 5pF to 27pF, this multi-turn capacitor can be made using only 6 items... My main interest has always been in FM Transmitters and FM Receivers...and always looking for unique ways of achieving the same end results, by making homemade devices in place of store-bought components. The Radio Shack Special project calls for a typical 6-lead variable tuning capacitor. The above picture is the homemade variable capacitor. This homemade device can be used for the Radio Shack Special Project or the TDA7000 FM Receiver Project or any RF device that would need a variable capacitor. Items needed for the project The machine screw and nuts can be purchased at your local Lowe's Store. Radio Shack sells magnet wire. ...your friend, Patrick
Whereto get stuff DIY Audio Home Where to get stuff I get a lot of questions about where I buy things. So I decided to post some hints. Note that since I am located in the US, the list is biased towards US suppliers. By no means is this intended to be an exhaustive links page - I hate those. Jump to: Commercial parts distis PCB Fabricators Hardware, wire, mechanical parts Electronics surplus Tubes Specialty tube audio vendors Commercial parts distributors that are DIY-friendly There was a time, not that long ago, that you couldn't go online and order parts from main-line electronics component distributors. Here are the ones I use: Allied Electronics - www.alliedelec.com You have to admire a distributor that pre-dates the invention of the transistor. Mouser Electronics - www.mouser.com Most DIY folks know Mouser. Digi-Key - www.digikey.com Almost everybody knows Digi-Key as well. Newark - www.newark.com Like Allied above, Newark is an old company. Master Distributors - www.masterdistributors.com PC board fabricators
Electronics - www.vetco.net Get loopy with the DIY $10 Ableton Footcontroller (no soldering required) A free keyboard-mapping utility called Autohotkey (if you’re running Windows). If you’re running Mac, the program to use is calledIKey. That’s it. Here’s how to make it go: Above: Steps 1-2. Simple enough. 1. You’re going to remove a significant number of the QWERTY keyboard’s keys, leaving only those spaced far enough apart to operate with your foot. 8.
Electronics DIY - Quality Electronic Kits, Electronic Projects, Electronic Schematics, FM Transmitters, TV Transmitters, Stereo Transmitters Liquidware : Open Source Electronics Adafruit MintyBoost USB Charger Kit v3.0 MUSES03 - JFET Input Super Audio Op Amp Features High purity oxygen free copper lead-frame Low Noise - 7.5nV/√Hz typ. at f=1kHz Ultralow Distortion - 0.00003% typ. at f=1kHz High Slew Rate - 35V/μs typ. Full Description An op-amp for the serious audiophile, the MUSES03 is what happens when you combine a passion for high fidelity audio with New Japan Radio's 50+ years of semiconductor design experience. Taking what they learned with the MUSES01 and MUSES02, The MUSES03 is a single J-FET input, ultra high quality audio operational amplifier that has been optimized for Premium audio and professional audio applications. Featuring high quality sound, low input bias current, low noise, ultra low distortion and a high slew rate the MUSEs03 is suitable for use in I/V converters, preamplifiers, active filters, headphone amplifiers, and line amplifiers.
Hacking A Fluke Multimeter To Serve Readings Over WiFi Your multimeter is probably your most useful instrument if you work regularly with electronics. It goes with you everywhere, and is your first port of call in most cases when you are presented with a piece of equipment. And when you think about it, it’s a pretty amazing instrument. Multimeter technology has advanced to the point at which even an inexpensive modern device has functions that would have required a hefty budget a few decades ago. There is still one thing affordable multimeters remain unable to do: they can’t log their readings for analysis on a computer. They’re an instantaneous instrument, just as they always have been. Lord of Hackaday [Sprite_TM] decided to hack his multimeter to serve its readings over Wi-Fi. Opening up the 15B+, he was presented with its processor concealed under a blob of epoxy and thus unidentifiable. Further detective work allowed him to identify the baud rate, and supplying random commands delivered him some that returned data packets.
Potentiometers – Mammoth Electronics Sale Sold Out Showing items 1-29 of 29. Power Quality Meter using Arduino -Use Arduino for Projects Arduino UNO project, Power Quality Meter, someone would call it’s PQ Monitor or PQ Analyzer. I had already published one blog devoted RMS voltage measurements on full band 20 – 20 000 Hz audio signals. ( Following my own style, I’d refer to already published materials whenever it’s possible ). This time measurements performed on single AC Power Grid frequency. ( 60 Hz in Canada. Algorithm would works with 50 Hz as well ). Features: Graphic LCD display 128×64;First 5 harmonics presentation;RMS Voltage Indicator;Frequency Monitoring;THD calculation;Internal data up to 63-d !!! The Holy Grail of this project, is a method of sampling input waveform. It’s completely eliminate necessity of the windowing.Only ONE period of input waveform is enough for precise calculation. In it’s essence, I created a software PLL (Phase Lock Loop). Hardware. As you can see on the drawings, circuitry is quite simple, one LCD ( I used SparkFun LCD-00710, could be different ) and one IC, LM311 – comparator.
The H.P. Friedrichs (AC7ZL) Homepage DIY Portable, Solar Powered Wi-Fi Repeater With a Wi-Fi hotspot, you can remain connected to the cloud from anywhere. Even then, a Wi-Fi router needs electricity to operate. To cut this umbilical cord, you can power it with the help of the sun or the wind just like this portable, solar powered Wi-Fi repeater. A solar panel powers a Linksys WRT54G v8 router with 7.5 volts at 500 milliamps in direct sunlight. For sunless times, you have a backup of 5 AA batteries that get charged up thanks to the solar panel. The solar-powered repeater is packed neatly into a cigar box for easy portability. What’s even neater is that the self built Wi-Fi repeater has a custom firmware called DD-WRT that scans and connects to the strongest signal automatically and then repeats it. Popular Wi-Fi Projects: