Online Museums of Hewlett-Packard

HP Archive  - This site is run by Glenn Robb, an Electrical Engineer and HP aficionado. It's goal is to help others collect, preserve and enjoy vintage HP equipment and literature.

Online Museum of Hewlett-Packard - Ken

"This web site is devoted to the history of test equipment produced by the Hewlett-Packard Company which is now known as Agilent Technologies. I own a huge collection of vintage Hewlett-Packard test equipment, catalogs, equipment manuals, and Hewlett-Packard Journals" -  Kenneth A. Kuhn.

HP's Instrumentation and Technologies Division became Agilent, Recently Keysight a new firm sprang from Agilent as the Heir to the Scopes, Meters, Oscillators and Counters. So in this blog we are relating to Keysight as the continuation of the old HP tradition of Test and Measurement.
(The present hp is a computer company and agilent a health care firm)



Their first business location in the Santa Clara Valley is the now iconic garage located at 367 Addison Avenue in Palo Alto. Here they manufacture the company's first product, the 200A Audio Oscillator. Disney Studios becomes interested in the 200A and orders eight to be used in the production of their movie, Fantasia.

Keysight Technologies History

"As the company moves into this decade it undergoes a major transformation. In 2013 Agilent Technologies announces that it will split into two separate pure-play measurement companies. The name of the new electronic measurement company is announced later in the year as Keysight Technologies."

The HP Garage is a private museum where the company Hewlett-Packard (HP) was founded. It is located at 367 Addison Avenue in Palo Alto, California. It is considered to be the "Birthplace of Silicon Valley"

HP Memory Project - Vintage Hewlett Packard
"The HP Memory Project is, first of all, a collection of vintage Hewlett-Packard hardware, software, documentation and other technical and marketing materials from HP's early years in the instrumentation and computer industry (beginning in 1939).

Microohm Meter with LED Analog Bar

This indicates like LM3914 in dot-mode. It is a drawing i made made to troubleshoot a gadget, around two decades ago. Strangely it had a echo of a design i had made into a 7107 dpm years before that. Now i am scanning all my drawing and notes, useful or not. Clean or with errors. Many Errors = 1 Blunder. Some projects i made have been expensive Blunders. So see them with a skeptic eye, fix them, try them. Thats all for now.

See the Circuit Full Size - Microohm Meter with LED Analog Bar



This has a 9V battery power. The 555 spins and a negative voltage for Opamp is created. This is a Low Offset amp of OP37 of Precision Monolithics, Inc PMI an early innovator. This diff-amp amplifies the uV of a 4 wire resistance measurement.

Now the current pump is the 2N2222 you see above the OP37. The FET and 555 do synchronous rectification. The LM324 is the Indicator and Analog to LED Dot-Bar Converter. The probes are Gold Plated, or use solid gold pins if you have them in plenty.

Mikes Optical Timer Counter

"This page is the result of a lot of effort over the past couple years to develop a quality, inexpensive device to test shutters on the classic film cameras that I have been using..." .. Mike

Mikes Optical Timer Counter

Once built, this counter timer/device is easily adapted to a wide variety of applications, simply by construction of a new sensor.  Although designed to be used with photo-transistors, this device can also use relays, transistors and many other kinds of electrical switches as a sensor.



Other Projects

Model Railroading, 3 Transistor Audio Preamp for a Dynamic Microphone

Configuration and control of this counter/timer is through a RS232 port. Cable configuration for a usual PC compatible would consist of a null modem cable, with a female connector on the timer/counter end of the cable. The correct cable for a PC or usb to serial adapter with a DB-9 interface is listed in the bill of materials.

Development boards and Tools - OLIMEX

Designs, prototypes and manufactures printed circuit boards, sub-assemblies and complete electonic products.

Development boards and Tools - OLIMEX

64MB SDRAM, 512MB NAND Flash. Ethernet 100Mbit controller, USB host, USB device, RS232 and 40 pin extension port with all unused SAM9261 ports available for add-on boards. Runs Linux, WindowsCE and other RTOS natively. RTC - 3V Li battery.



SAM9-L9261 Development Platform with ARM9

SAM9-L9261 is development platform with ARM9 microcontroller, TFT LCD 3.5" 320x240 pixels with TOUCHSCREEN.

• MCU: AT91SAM9261 16/32 bit ARM9 180MHz operation
• On board voltage regulator 3.3V with up to 800mA current

OLIMEX Ltd.
89 Slavjanska St., P.O.Box 237, Plovdiv 4000 BULGARIA

555 and CD4017 Running Lights

This is a Gadget Tutorial for this Article LED Running lights CD4017 - Live Gadget Page.

Red Button Powers LED Running Lights, 555 Clock is counted by CD4017. Adjust R2, See ToolTips. This Demo shows LM555 running a CD4017 Counter to drive Ten Leds sequentially.

Press the Red button below to turn on the circuit press it again to turn off, i have put a new battery and did the wiring for you. The Red LED will flash according to the state of the 555 output at pin 3. The decade counter-divider CD4017 has 10 outputs, for every low to high transition, rising edge, the counter advances one LED. After going one full circle the the first LED lights again and it goes on.....



The 10 outputs have 10 green LEDs. The current thru the LED is limited by R1, the current can be calculated like this (9V - 1.6V) / 1K = 7.4mA this is within 20mA which is the danger limit of the CMOS output. You want it to be bright use transistors for every output.

Build Electronic Circuits Like a Pro

If you want to build electronic circuits, you need to connect the components of your circuit somehow. If you expect to make your circuit work more than just a few times, you need a solid way of connecting them. You need to create a printed circuit board (PCB).

"I started playing with electronics as a hobby when I was 14. Since then I have finished a Master's degree and founded two electronic design companies."

Build Electronic Circuits Like a Pro



The radar sensor uses a Ultra-Wideband (UWB) chip from Novelda. It sends out electromagnetic pulses and analyzes the pulses that are reflected back. In the video above, a part of the electromagnetic pulse will be reflected back when it hits the wall and a part of it penetrates the wall and is reflected from the cabinet behind the wall.

Radar Circuit Enables See-through Wall Robot

delabs Notes

This is a nice Educational Website built by Oyvind from Norway. Only when we read and learn from the experience and views of others, our brain opens up to new ideas and we develop a wide perspective.

Allied Electronics - Electronic Components Distribution

Allied Electronics is a small order, high service level distributor of electronic components and electromechanical products with 55 sales branches across the United States and in Canada.

Allied Electronics - Electronic Components Distribution

• Actives & Passives
• Enclosures & Cooling
• Switches, Relays & Control
• Connectors, Wire & Cable
• Prototyping & Production

Pomona Electronics 72902 - Test Clips Sets

Kit of 12 Micro SMD Grabbers in 6 colors. Grabbers are designed for easy attachment to SMD chips with pitches down to 0.008" (0.20 mm). Thin yet durable design permits attachment in tight areas.

History of Allied Electronics -

1928: Allied Radio was established as the radio parts distribution arm of Columbia Radio Corporation. The company was soon to become one of the most recognizable names in the electronics industry.

1995: Allied is the first electronics distribution company to come out with a CD-ROM catalog and quickly followed-up by entering the e-commerce arena with the launch of a web site.

Allied Electronics, Inc.
7151 Jack Newell Blvd. S. Fort Worth, Texas 76118 U.S.A.