“I make things, mostly technological, but don’t hold me to that, consistency is not a human virtue. Electronics and software, cast iron and plastics, microcontrollers in vintage automobiles, faux historical machinery that could (not) have been; finely crafted, rigorously rugged, reliable, most often.”
Tom Jennings – World Power Systems
The Model 01a (aka M01a) is a 3″ x 5.5″ self-contained controller board designed for embedded applications. It’s based around Microchip Inc’s in-circuit-programmable 14-bit PICs, and contains I/O expansion, a power supply and various goodies that I found useful in five years of using my previous controller board design.
WPS Model 01a Control Engine
The M01 board contains enough support hardware to pull off a lot of functionality. Before I get to handling common interface problems here’s a function-by-function description of the hardware. There’s some subtlety to some of the design that’s worth paying attention to.
Index of www.wps.com, by subject
Technical reference data; obsolete, obscure, hard to find, and sometimes just plain old; mostly things made or written by others.
Designing Bipolar Transistor Audio PreAmps, Designing JFET Transistor Audio PreAmps, Designing Op Amp IC Audio PreAmps, Switching Regulator Basics, Using Transistors As Switches.
RASON Projects Page – Amateur Radio
- 10 Amp, 13.8 Volt Power Supply
- 12 Volt Gel Cell Charger
- Thermal Fan Controller
- Transistor Audio Amplifiers
- 12 Volt Gel Cell Charger
- Switching Regulator Basics
A Potpourri of Audio Amplifiers By N1HFX
“I intentionally avoided the use of IC amplifiers to provide a real learning experience for audio amplifier design. Although many IC amplifiers provide excellent performance at low cost, we need to learn the basics first. I will address IC audio amplifiers in a future article.”
The Radio Amateur Society of Norwich
P.O. Box 329 – Norwich, Connecticut 06360
Some things you can find there -CB & Ham radios, Walkie-talkie (GMRS/FRS) radios and Shortwave & multiband radios.
RadioShack- Audio Video Electronics
The company was started as Radio Shack in 1921 in Boston, Massachusetts, by two brothers, Theodore and Milton Deutschmann, who wanted to provide equipment for the cutting-edge field of amateur, or ham radio.
Theodore and Milton Deutschmann opened a one-store retail and mail-order operation in the heart of downtown Boston. They chose the name, “Radio Shack,” which was a term for the small, wooden structure that housed a ship’s radio equipment. The Deutschmanns thought the name was appropriate for a store that would supply the needs of radio officers aboard ships, as well as “ham” radio operators.
The first 40 years – RadioShack Corporation – Wikipedia
“I present, below, a collection of projects I have worked-on over the past few years. For over a decade, I had taught both embedded systems (microcontroller technology) and digital signal processing and practice what I preach….”
Professor Mark Csele – Projects and Hobbies
Nixie Thermostat – A heating and cooling thermostat employing technologies spanning fourty years from the unique Nixie tube display, circa 1960’s, to a PIC 18F microcontroller, circa 2006.
A High-Powered Power Backup Inverter – The working prototype of the 2 KVA inverter is complete. Fed from an array of lead-acid cells totalling 600 Ah (at 12 Volts), it easily drives real-world loads such as single-phase motors. The inverter has been tested and found to operate at an efficiency of between 71% and 82% driving a variety of both inductive and resistive loads
PJRC Electronic Embedded Systems Projects with parts Paul and Robin’s Home offers free technical design data and detailed instructions for building them. Useful for Education. .
PJRC – Embedded Electronic Projects
The Teensy is a complete USB-based microcontroller development system, in a very small footprint, capable of implementing many types of projects. All programming is done via the USB port.
Version 3.6 features a 32 bit 180 MHz ARM Cortex-M4 processor with floating point unit. All digital and analog pins are 3.3 volts. Do not apply more than 3.3V to any signal pin.
Teensy USB Development Board
8051 Tools, 8051 Development Circuit Board, PAULMON2 Monitor Program, AS31 Assembler & SDCC C Compiler, Code Library.
8051 Resources And Projects
delabs Notes –
What better way to learn the uC, than by Building your own Musical Instrument or Music Player. More Motivation than you can ask for.
Dual Polarity Power Supply
Two versions of a dual polarity power supply with printed circuit board artwork. The supplies are built around the popular LM317 & 337 complementary voltage regulators which offer very high ripple rejection as well as short-circuit and thermal protection.
A battery-powered microphone preamplifier and microphone wand for acoustic tests and recording. The preamplifier features 20dB of switchable gain and a clipping indicator,
Jason Neals DIY Audio and Electronics
An interesting website with many photos of electronic projects. There are not many projects but the description and photos and documentation are very useful for learning the art of circuit design.
“So what what do we do here? SparkFun, the company, sells the bits to build stuff – like a robot, or an MP3 player, or a defibrillator, really anything you can dream up! We are electronic enablers….”
SparkFun Electronics – Parts and Kits
SparkFun is an online retail store that sells the bits and pieces to make your electronics projects possible.
“It’s our fun blend of gift shop, electronic project gallery, and a glimpse into our manufacturing floor. The Emporium is stocked with kits, breakout boards, and many other bits and pieces you might need for your projects.”
Tool Kit – Deluxe
Digital Multimeter – Good volt/current meter, with continuity testing and a Monocle Magnifier – Illuminated – Gotta see those tiny SMD parts
50W Variable Temperature Soldering Iron, Solder Tip Tinner and Cleaner and Wick. Wire Strippers, Needle Nose Pliers and Diagonal Cutters.
6175 Longbow Drive Boulder, CO 80301, USA