Posts Tagged ‘review’

Electronic key tear down

Tuesday, July 10th, 2018

Tear down of an Electronic key  from Electronupdate: In the mid 1980's a company called Dallas Semiconductor was producing a wide range of small RAMs with integrated battery backup. One of the more unusual item was an early attempt at an electronic key: a user would be issued a key which...

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Silicon die analysis: Inside an op amp with interesting “butterfly” transistors

Tuesday, July 3rd, 2018

An excellent in-depth look at theTL084 op amp by Ken Shirriff: Some integrated circuits have very interesting dies under a microscope, like the chip below with designs that look kind of like butterflies. These patterns are special JFET input transistors that improved the chip's performance. This chip is a Texas Instruments...

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Hard disk drive head assembly teardown

Monday, July 2nd, 2018

A look at a head assembly for a hard disk drive. See the full post on Electronupdate blog. Check out the video after the break. (more…)

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Siglent SDG6000X Series Arbitrary waveform generator review, teardown and experiments

Wednesday, June 6th, 2018

A closer look at the newly released Siglent SDG6000X Series Arbitrary Waveform Generator from The Signal Path: The full teardown of the unit reveals the internal architecture of the instrument, DAC / FPGA interconnect as well as the output amplifier structure. Although the limitations of the FPGA prevents the instrument to operate...

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Capacitor plague? Inside an HP 8620C sweep oscillator and HP 86245A RF plugin

Wednesday, February 21st, 2018

A teardown of the HP 8620C and HP 86245A by Kerry Wong: I just picked up an HP 8620C sweep oscillator with an HP 86245A 5.9 GHz to 12.4 GHz RF plugin on eBay. This time around though, the unit does not work. While it was advertised as a working...

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Teardown of an HP 8671A microwave frequency synthesizer

Monday, February 5th, 2018

Kerry Wong did a teardown of an HP 8671A microwave frequency synthesizer: I recently bought an HP 8671A microwave frequency synthesizer on eBay. This synthesizer can generate signals from 2GHz to 6.2GHz with an unleveled output of more than 8dBm. It is a nice complement to my HP 8642B signal...

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IBM mainframe tube module part II: Powering up and using a 1950s key debouncer

Wednesday, January 17th, 2018

Here’s an interesting two-part series of posts by Ken Shirriff detailing the IBM mainframe tube module. Part 1 discuss the tube modules and describe the IBM 705 that used this module. Part 2 covers powering up the module and getting it to work. Read the full post at Ken Shirriff' blog.

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Inside a PM1A color analyzer

Monday, January 15th, 2018

Kerry Wong did a teardown of a PM1A color analyzer: As I mentioned in one of my posts a few years back, a color analyzer from the 80’s can be a treasure trove for the hobbyists. And at the very least, it is a cheap way to get yourself a...

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Teardown of an opto-isolator

Monday, January 8th, 2018

Cross section and analysis of an opto-isolator from Electronupdate. Check out the video after the break. (more…)

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Teardown of a 65W Cree LED bulb

Wednesday, January 3rd, 2018

Kerry Wong did a teardown of a 65W Cree LED bulb: Upon removing the glass bulb enclosure, I was a bit surprised to see that only two power LEDs were used in this Cree bulb. Typically, you would see many more lower wattage LEDs put together to achieve higher wattage...

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Sense energy monitor teardown – sampling in MHz

Thursday, December 21st, 2017

Tisham Dhar did a teardown of a Sense Energy monitor: Recently I obtained a Sense Energy monitor via US from Margaret of BitKnitting. She is doing a very interesting neighbourhood energy efficiency project. As usual I could not contain my curiosity and opened it up to have a look. I...

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Teardown of an ATVR-1000D AC voltage regulator

Monday, November 27th, 2017

Kerry Wong did a teardown of an ATVR-1000D automatic AC voltage regulator and discussed how different types of AC regulators work: The ATVR-1000D utilizes a motor to drive the wiper of a autotransformer (Variac), the servo motor can be driven in either direction depending on the output from the OpAmp...

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A full review of EasyEDA: A circuit EDA online tool

Tuesday, November 21st, 2017

Yahya Tawil wrote in to share his review of a web based EDA tool, the EasyEDA. He explains the general structure of this tool and some of its cool features: EDA cloud tools which are related to electronics are emerging exponentially in almost all aspects (i.e. simulation, PCB design, footprint creation,...

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Schottky diode cross section

Tuesday, November 14th, 2017

The cross section of a 1N5817 20V 1A rectifier diode from Electronupdate. Check out the video after the break. (more…)

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A look inside the DS3231 real-time clock

Thursday, August 10th, 2017

Pete posted an article taking a closer look at Maxim's DS3231 real-time clock: Fortunately, Maxim also offers the DS3231, which is advertised as an “Extremely Accurate I2C-Integrated RTC/TCXO/Crystal”. This chip has the 32kHz crystal integrated into the package itself and uses a built-in temperature sensor to periodically measure the temperature...

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BSide ACM03 plus clamp meter review and teardown

Monday, July 24th, 2017

A review and teardown of a cheap Hall effect clamp meter (ACM03 Plus) from Kerry Wong: I recently purchased a BSide ACM03 Plus clamp meter so that I could do some high current measurements for my tab welder project. This meter can be bought on eBay for around $25, which...

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Posted in Teardowns | 1 Comment »

Akafugu modular VFD clock review

Friday, July 14th, 2017

Manuel Azevedo did a review of Akafugu's modular VFD clock: I discovered this wonderful tiny VFD clock by chance, while browsing Tindie for novelties. As I’m a newcomer to this Nixie/VFD world, I was not aware that Brian Stuckey already did an article in 2014 on a previous incarnation of...

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Posted in clock | 6 Comments »

Dallas Semiconductor DS1284 die decap: A look at a 30 year old design

Tuesday, June 27th, 2017

Dallas Semiconductor DS1284 die decap from Electronupdate: The Dallas Semiconductor DS1284 (and related DS1286 which integrated a battery and crystal in the same package) found lots of use in industrial control and test equipment. 30 years ago processor chips contained not much other than the processor. Utility functions such as real...

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Piezoelectric buzzer teardown

Thursday, June 1st, 2017

A teardown of piezoelectric buzzer from  Electronupdate: An assembly commonly used on fire, burglar and similar alarm systems. Based around a piezoelectric disk coupled to a plastic cylinder with a hole on the end (used to amplify the sound). The controller appears to use a rom-based look up table to...

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Cross section and analysis of a SMT inductor

Monday, May 22nd, 2017 A look at the cross section of a surface mount inductor from Electronupdate.

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