The Philbrick Archive - Bob Pease and The OpAmp

This site is a free non-profit repository of materials from GAP/R George A Philbrick Researches, the company that launched the commercial use of the Operational Amplifier in 1952.

The Philbrick Archive and Operational Amplifier



The first commercial Operational amplifier was the K2-W op-amp. It was based on the amplifier used in the Philbrick modular Analog-Computor "black boxes ".



That amplifier's basic circuit architecture, in turn, was probably inspired by an earlier amplifier designed by Loebe Julie (Dan Sheingold and Bob Pease, thanks for helping me with this information). The K2-W Operational Amplifier entered the commercial market in 1952.

Android Hardware Development Kit

The Android Hardware Development Kit is designed for enterprise embedded developers looking for a single, all-inclusive solution for a variety of prototyping needs.

Android Hardware Development Kit

Android Hardware Development Kit is the first Open Hardware solution designed for full hardware customization. Together it is a Open System Design Solution.


Runs with a 720MHz ARM-based, open source BeagleBoard C4

Some Features are

• Display: 4.3 inch touch display
• Screen: 480×272 OLED screen
• RAM: 128MB
• 32bit Single Core
• SD Storage: 4GB SD Storage
• On Board Flash: 256MB
• 4 USB Host Port Adapter
• Wi-Fi 802.11b/g
• Ethernet (RJ-45) USB 2.0 10/100 Ethernet Adapter
• Video Output: DVI to HDMI
• Video Output: S-Video
• Speaker (Stereo Headphone Out): 3.5mm Audio Out

Mouser Electronics - Electronic Components

Mouser Electronics, Inc. is an electronic component distributor, focused on the rapid introduction of new products and technologies to electronic design engineers. Mouser.com features over 850,000 products online from more than 330 manufacturers.

Mouser Electronics - Electronic Components

You can procure components like Optoelectronics, LED Lighting, Semiconductors, Discrete Semiconductors and ICs. They also offer Development Tools useful for the R&D Lab. You can even get Test & Measurement Instruments and also Some Tools for Electronics Manufacturing.



"The combination of affordable electronics design tools (e.g. Mouser's MultiSIM Blue), open source software licensing, desktop manufacturing equipment (e.g. 3D printers and CNC machines, and PCB manufacturing services (e.g. PCB Assembly Express) that cater to small volume productions are making the niche product design affordable and easier than ever before."

Analyzing the Possibilities: Designing a Tricorder BoosterPack

In the world of Star Trek, Captain Kirk and crew have access to an incredible assortment of 23rd century technology to help them on their missions. The Communicator, the Phaser, and of course, the Tricorder. For the uninitiated, the Tricorder is jack-of-all-trades device that allows a crew member to scan their surroundings to acquire information on just about every environmental variable possible.

Mouser Electronics
1000 N. Main Street Mansfield, TX 76063, USA

Electronic Hobby Projects - Chemelec

This is one of the oldest Electronics DIY Project Sites in the Internet. I now discovered he has a dedicated domain too. Gary from Canada has many useful schematics and even provides kits and parts.

Electronic Hobby Projects - Chemelec

Some projects that may ring bells in your DIY Brain

• A 10 Watt RMS Amplifier
• A Solar or Wind Charger/Dump Circuit
• A Cat or Dog Detector
• Inverter, 12 volt unit, Mos-Fet design
• A 25 LED Chaser". (Sequencer)
• A Metal Detector, for Pin Pointing.
• Watt Meter", Measures True RMS Watts
• Pulse Induction Metal Detector

A Mos-Fet Power Inverter

This circuit will provide a very stable "Square Wave" Output Voltage. Output Frequency is Adjustable and Stable. Can be used to deliver a wide range of output voltages by using appropriate turns ratio. Additional MosFets can be paralleled for higher power.

Peter H. Anderson - Embedded Processor Control

This is a very useful computer interfacing resource for instrumentation. PC Parallel Port, Use of a PC Printer Port for Control and Data Acquisition, Serial Control and Measurement. Many Microchip PIC Type projects.

Peter H. Anderson - Embedded Processor Control

This is a combination of LCD PIC, an assembled printed circuit board from ModernDevice.com, a 20X4 LCD with Blue / White backlight and interfacing connector. - The Arduino Processor



Assembled Serial LCD with Blue LCD

Also - 68HC11 Assembly Language ProgrammingParallel Port Interfacing with 2, 3 and 4 Wire Serial Devices.  BasicX, BASIC Stamp.

Elektronik und Mikrocontroller - Burkhard Kainka

Author of books and CDs, Microcontroller, interface programming or new ideas for hobby projects. The Electronics Fundamentals for hobby and education helps the beginner with valuable information.

The electronic logbook is amazing, you can have a look at so many circuits and projects with photos. You will learn many things and make you develop skills.

Elektronik und Mikrocontroller - Burkhard Kainka

For the advanced Hobbyist there are projects on Microcontroller and Measuring and control devices with the USB and PC Interfacing,



SDR Radio with USB

Electronics experiments for children - "For children it is easier than for adults. Since it is enough, if someone applied sufficient time and a little tinkering with them. Often all it takes is a little push to arouse interest and skills."

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.



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). "