Bill O’Donnell – Tech Gizmo Builder

These are high tech jigs, fixtures and instrumentation/automation gizmos that bill built. Electrical gizmo builder for the UNLV Physics Dept.

Bill O’Donnell – Tech Gizmo Builder

These projects are advanced and not for a beginner student or newbie hobbyists. These pages are knowledgable and will help students and DIY enthusiasts understand more about Lasers, Precision Temperature Control and stepper motors among other things.

Bill Tech Gizmos

Auto Fill Circuit for Laser Cooling Loop – Ethernet Data Logging

Here is an automation solution with a ethernet usage. The code and diagrams are also there. This is something that covers many aspects of engineering in one project. Try such things out to learn, only after you have mastered the basics.

“The Ethernet connection is based on an XPORT form Lantronics. Basically it lets you use a serial port to send things over Ethernet. A PIC microcontroller with an A/D converter digitizes the pressure, the pressure set point, the high and low pressure alarm points and the supply voltage (since everything is ratio-metric). “

BeagleBot – Beagle powered robot

“For measuring distances I chose to use SRF08. It is an ultrasonic ranger with I2C bus and measure range from 3 cm to 6 m. The sensor has a beam width of 55 degrees (-6 dB points) and when mounted on top of one of the servos it can be used for covering well over 180 degrees.”

BeagleBot – Beagle powered robot – A small experimental robot with Beagle Board as it’s heart.

Servo System -Double Hitec HS-422 servos mounted on a special two axis brackets. – 5 pcs of normal RC servos with 50 Hz PWM control. ATMega16 at the expansion board creates the PWM for all of the servos and provides an I2C control interface for them. User space application running on beagle board can thus control the servos just sending only a simple I2C message.

BeagleBot - Beagle powered robot

“The Beagle Board is a low-cost, fan-less single-board computer based on Texas Instruments OMAP35x processors featuring the ARM Cortex-A8 core”

The USB-powered Beagle Board is a low-cost, fan-less single board computer that unleashes laptop-like performance and expandability without the bulk, expense, or noise of typical desktop machines.

Beagle Board – Create Open Embedded Devices

The BeagleBoard.org Foundation is a US-based non-profit corporation existing to provide education in and promotion of the design and use of open-source software and hardware in embedded computing.

Learn thru Hobby Electronics

hobby-electronics.info information site electronics hobby.  For beginners or learners taking an electronics course!  would be a fun way to start. Electronics Projects page has some projects with a PCB layout for easy building too.

Learn thru Hobby Electronics

Learn thru Hobby Electronics

The Course – “We start with a few lessons about voltage, current en resistance. Next, we’ll discuss power dissipation and capacitors, diodes and transistors. We now have enough knowlegdge to build a simple power supply. And after a few lessons about differential amplifiers and operational amplifiers, we are even able to design and build a professional lab power supply.”

Thomas Driemeyer – Bicycle Guide

“I often get asked about bicycle maintenance and repairs, and tips for how to ride efficiently. This little manual is intended as a summary of what I have learned over the years. I am not a professional mechanic.

Thomas Driemeyer – Bicycle Guide

All of what I say here is the result of personal experience and opinion and may in places flatly contradict professional techniques, but it has served me well. I offer no guarantees that it will work for you. If your bicycle falls apart because I said something wrong, you are on your own.” – Thomas Driemeyer .

Computer-controlled LED lamp

Computer-controlled LED lamp

This page shows how to build a lamp using this module that can be programmed to show any color or cycle of colors, as instructed by a PC or Mac over a serial RS232 line. (Or USB, using a cheap USB-to-serial adapter – unfortunately USB cables cannot be longer than about two meters before they become either unreliable or very expensive.)

DSO Nano – Digital Storage Oscilloscope

DSO Nano v2 is an Open Source Portable and lightweight Digital Storage Oscilloscop that has a Color display and is designed for basic electronic engineering tasks. Its palm size and handy features make it great for in-field diagnosis, quick measurement, and hobbyist projects. Schematics and source code files are also openly available for re-innovating.

DSO Nano –  Digital Storage Oscilloscope

Auto measurement – Useful for quickly exploring signal characteristics. Measurement options include frequency, cycle time, duty cycle, peak voltage, RMS voltage, average voltage and DC voltage. Please note that frequency, cycle time and duty cycle can only be measured while triggering.

DSO Nano - Digital Storage Oscilloscope

Features – Waveform storage and playback, 6 triggering modes, 200Khz Analog Bandwidth, Complete measurement markers and signal characteristics. Built-in Signal Generator too.

User Interface Overview – The screen is broken into a central display area and 3 operation bars around it. The menu on the top provides the most frequently-used adjustments to signal display. The status bar on the bottom provides precise measurement results and monitoring status. Adjust more advanced functions with the column of function icons on the right.

Ozitronics – Electronic Kits

“Audio Amplifiers, Voice Recorders Clocks, Counters & Timers, Data Acquisition & Control Educational Kits, Test & Measurement ”

Ozitronics – Electronic Kits

K1001 – 8 Channel Serial Servo Controller, Assembled & Tested

ozitronics servo kit

K1001 is an 8-Channel Serial Servo Controller based on the Atmel 89C2051 microcontroller. It accepts RS232 or TTL serial data from a computer or microcontroller and outputs PWM (pulse width modulated) signals to control up to eight RC servo motors (as used in radio-controlled model airplanes, cars, etc.). Unused servo pins can be reconfigured for digital output to drive on/off devices.

Up to four controllers can be multi-dropped on a single serial port for controlling up to 32 servo motors – more on request.

Reuse Wireless Keyboard and Mouse

Many people give up on Wireless Keyboard Mouse Combo after a few months of “Novelty”. This is due to the chore of replacing batteries and also the cost and wastage (carbon foot).

Then i have long been suggesting, nineties, ferrite smps coupled charger docks. This is like RFID, but more like RF power transfer. One half of Ferrite E-Core is in the Gadget and the other half is in the Dock. When the Gadget is docked it is sensed and power transfer just like in SMPS. Rechargeable batteries in the gadget.

How-To Convert Wireless to Pseudo-Wired

Wired Wireless Keyboard Mouse Combo  -Here is the Schoodle for building this. The Mumbo Jumbo to make a Wired-Wireless Combo is below.

Wired Wireless Keyobard Mouse

Now you got a Wireless Combo, it can be converted into wired yet wireless, it is simple the wires will now carry 3V power to the Keyboard and Mouse, so no batteries. A little gentle and smart drilling is needed for the Mouse.

Get a 5V Adapter, the ones used for charging phones and music players. If you cannot get 5V use a 7805 to derive a 5V from 6 or 9. Use two 1N4007 in series on the positive line to drop 1.5V – test out with a dummy load of 10K and 100uF cap. Now use this to power both the mouse and keyboard with thin dual-core wires leading to the battery terminals. Soldering this may be a delicate job. Now you got a Perpetual Wired Keyboard Mouse Combo. The Interface still remains Wireless.

Another way is use Rechargeable Batteries for both. The wires will carry exactly a regulated 3.3V from a LM317 circuit which can be tweaked. The Mains adapter can be any 6V or 9V raw DC. You can have a Connector for the power wires when you want it to be wire free. This may require greater Gadget Opening and Drilling Expertise.

Reuse – Be Earth Friendly – Keep your Carbon Footprint smaller than that of a Yeti.