mightyohm.com - Join the Resistance!

Jeff Keyzer, aka mightyohm. Amateur Radio and DIY Electronics Projects are there with this High Wattage Resistor. posts about microcontrollers (mostly PIC and AVR), Arduino, embedded Linux, circuits, DIY projects, and other related stuff. 

mightyohm.com - Join the Resistance

Includes PCB with pre-assembled DC-DC converter, all components required to build the kit



The AVR HV Rescue Shield is a high voltage parallel mode fuse programmer for Atmel AVR microcontrollers. It currently supports the ATmega48/88/168/328P series and the ATtiny2313.

AVR HV Rescue Shield Kit 2 - mightyohm.com

Some Features:

• Version 2.1 introduces a new and improved 12V switching circuit
• Completely open source. Source code, schematics, layout, BOM are available.
• Onboard 12V DC-DC boost converter eliminates the need for an external 12V power supply.
• Support for programming the extended fuse (EFUSE) byte.
• An interactive mode, where desired fuses can be entered using the Arduino’s serial port.
• Separate Ready and Burn indicators.

PICAXE - Powerful uC Programming

PICAXE - Powerful uC Programming

The 'PICAXE' system is an extremely powerful, yet low cost, microcontroller programming system designed to simplify educational and hobbyist use of microcontrollers.

The buggy is a mobile robot having microswitch sensors- LED eyes- piezo sounder and worm drive gearboxes using high quality solar motors.The microcontroller and battery pack is built onto the buggy- so that it is totally self contained.

N5ESE - Gizmos for QRP Ham Radio

"One day I noticed a project, obviously homebrew, mounted on a piece of plywood, and nearly covering the worktable. When I asked him what it was, he glowed as bright as the half-dozen tubes that lit up when he turned it on. Twenty seconds or so later, out spews from the speaker the cracklings and whistles of 40 Meter CW. I was amazed, and at that moment the homebrew bug bit me hard. I was determined to build something myself, and get my ham ticket."

N5ESE - Gizmos for QRP Ham Radio



N5ESE's GIZMOs For the QRP Homebrewer and Ham Operator

"Everybody loves a "gizmo". Hams have a weakness for them. Gizmos can be expensive for full-power amateur radio equipment, but homebrewing QRP gizmos is "cheap and easy". Most of the projects here cost less than $20 (or nothing, if you have a modest junk box), and take only a few hours to build). Most are even suitable for the novice builder. And all have real practical value, especially for homebrewers and QRP operators. "

Pic Projects from Mondo Technology

Pic Projects from Mondo Technology

These are many projects you can try out with Microchip PIC. Code and schematics are there. You can build it then start tweaking or altering the code and later modify circuit. This is another way of learning. You must be sound in building analog and logic circuits first.

This is the order of learning ..

• Learn to use Batteries, LEDs, Wires, Switches, Soldering Iron and Resistors.
• Build some projects with NPN and PNP transistors with capacitors.
• Try some Toy Transmitters and Receivers using RF devices and Inductors.
• Fix some power supplies like Transformers, Diodes, Regulators.
• Configure small Analog Amplifiers and also Audio Amplifiers, 555 Timer.
• Test out some LOGIC circuits with the 40xx Chips like 4093, 4028.
• Start with some small PIC project or 80C51 Microcontroller.
• Make a SOC with DSP and build a Robot Brain controlled Online.
• Get a Patent quick !

Sine Triangle Square Saw Burst Sweep Noise on a PIC16F870

Model Railroad Electronics - Rob Paisley

Model Railroad Electronics - Rob Paisley

"Electronic circuits that are mostly for model railroads. Shown are designs that were developed to solve certain problems or achieve a desired control function. There are throttle, train detection, animation, control and general purpose circuits on this page."

There are also some ideas for LEGO Brick

555 Timers pages of Rob Paisley

• Soldering Leads To Phototransistors And LEDs
• Voltage Comparators and OpAmps
• Bad And Good Circuit Board Solder Joints