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Archive for the ‘Teardowns’ Category

Teardown of a TDA7375 audio amplifier IC

Wednesday, April 12th, 2017

A teardown of a TDA7375 audio amplifier IC from Electronupdate: The TDA7375 audio power amplifier. Another example of a long-lived integrated circuit.  1st introduced in 1998... looks like it's still being made. Check out the video after the break. (more…)

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Cheap UV EPROM eraser teardown and spectrum analysis

Monday, April 10th, 2017

  Kerry Wong did a teardown of a cheap UV EPROM eraser and measured the spectrum of the UV tube using a monochromator: Till recently, I have been using custom circuitry whenever I needed to backup some firmware. But the process was rather tedious as for each kind of EPROM...

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Teardown and review of the new MHS5200A

Friday, March 10th, 2017

[embed]http://www.youtube.com/watch?v=TQXd7u4kPvs[/embed] Craig writes: I’ve gotten a lot of questions on the blog about the new version of the MHS5200A function generators available on eBay. Viewer Tolga was kind enough to send one in to me to review and tear down. Although some improvements have been made over the older models,...

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Datum/Symmetricom 8040 Rubidium frequency standard teardown

Tuesday, March 7th, 2017

Teardown: A look at the Datum/Symmetricom 8040 Rubidium frequency standard The 8040 used an LPRO 101 (low profile Rubidium oscillator) oscillator. Interestingly, there is a note written on the top of the LPRO case: “vibration test may have magnetized cover”. As you may know, Rubidium standards’s accuracy is very sensitive...

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Keysight MXA revision-b signal analyzer / Spectrum analyzer review, analysis & experiments

Monday, March 6th, 2017

Keysight MXA revision-b signal analyzer / Spectrum analyzer review, analysis & experiments from The Signal Path: In this episode Shahriar reviews the long awaited Keysight MXA Signal Analyzer (N9020B). The new X-Series Spectrum Analyzers from Keysight offer an entirely re-designed GUI interface which supports multiple tabs as well as multi-touch interaction....

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Teardown and analysis of microwave (26.5GHz) electro-mechanical step attenuators

Tuesday, February 21st, 2017

[embed]http://www.youtube.com/watch?v=IQZxvtEn4T8[/embed] Teardown and analysis of microwave (26.5GHz) electro-mechanical step attenuators from The Signal Path: In this short episode Shahriar takes a close look at a pair of Hewlett Packard microwave electro-mechanical step attenuators operating up to 26.5GHz. Mechanical attenuators offer excellent repeatability, low insertion loss and nearly limitless linearity. The...

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Teardown of a Peaktech 6225A

Tuesday, February 7th, 2017

Teardown and analysis of a Peaktech 6225A power supply from ElectroBob: I got a Peaktech 6225A power supply to power some things, as it seemed like a good deal, going beyond what one might find normally in these types of supplies: more display resolution and supposedly, lower noise. For this price,...

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A look at the Neopixel: Controller die teardown

Sunday, February 5th, 2017

A look at the Neopixel from Electronupdate: A WorldSemi WS2812B, a.k.a. "NeoPixel".  This little device can be easily controlled by a Arduino and can be used in all sorts of neat things.  More details, and a truly excellent Arduino Library may be found at Adafruit. Three LEDs and a controller bonded into...

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4-20ma panel meter teardown

Thursday, February 2nd, 2017

Teardown of a 4-20ma panel meter from SteelCity Electronics: Below is a panel meter that has been used in some sort of industrial process. It was manufactured in 1980 and I’m not quite sure who the manufacturer was – the company’s logo is not easy to read but it might say, “Aumano”....

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Teardown, repair and experiments with a Tektronix RSA 6114A real-time spectrum analyzer

Friday, January 27th, 2017

Tektronix RSA real-time spectrum analyzer teardown from The Signal Path: In this episode Shahriar attempts a difficult repair of a Tektronix RSA real-time spectrum analyzer. This well-equipped instrument reports several error messages during startup POST including LO Unlock as well as Signal Path failures. The service manual of the instrument...

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Teardown, experiments and calibration of an Ist-Rees laser spectrum analyzer

Tuesday, January 24th, 2017

Ist-Rees laser spectrum analyzer teardown from The Signal Path: In this short episode Shahriar takes a close look at an Ist-Rees laser spectrum analyzer. This simple instrument is based on a continuously rotating diffraction mirror to detect various wavelengths. A trigger signal is used to denote the beginning of the scan...

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TI’s Little Professor

Monday, January 23rd, 2017

A teardown of TI's Little Professor vintage calculator from KuzyaTech: This thing was sold for parts and repair since the seller did not think it was working. As it turned out, everything worked just fine, but not in an expected way. This is not your typical calculator, but rather a teaching one....

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Tear down of a super capacitor

Tuesday, January 10th, 2017

[embed]http://www.youtube.com/watch?v=8Uxd00N3CRc[/embed] A teardown video of a 1 Farad super capacitor from Electronupdate: In a recent video on the tear down of an electrolytic cap a viewer was wondering what a super capacitor looks like. They have much more capacitance: 10,000 time more on average for the same volume. Surely this means the...

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Curtis 1231C-8601 500A PWM DC motor controller teardown

Monday, January 9th, 2017

Jay did a teardown of a Curtis 1231C-8601 500A PWM DC motor controller: The Curtis 1231c-8601 power board is relatively simple. It uses 18 MOSFETS in parallel to switch current from the motor- terminal back to the battery- terminal (the motor+ lead is already connected to battery+). The MOSFETs it uses...

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Solar battery charge controller teardown

Monday, January 2nd, 2017

[embed]http://www.youtube.com/watch?v=2vCQJtN3Obk[/embed] A teardown video of a solar battery charge controller from Electronupdate: A solar battery charger: one side goes to a Solar Panel, the other to a lead-acid battery. A charge controller allows the battery to be safely charged. Snagged off of Amazon. Seemed really cheap at $17.36. A look...

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Mastr III repeater teardown

Tuesday, December 27th, 2016

[embed]http://www.youtube.com/watch?v=grzvNoBKWuo[/embed] Kenneth Finnegan writes, "I recently purchased a pallet (!) of Mastr III repeaters for some parts. These are really unique radio systems since their so modular, so I thought you'd enjoy a video where I tear one apart and talk through its basic theory of operation." More details at Kenneth's...

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Software Defined Radio IC Decap: R820/RTL2832U

Monday, December 26th, 2016

Software Defined Radio teardown: R820/RTL2832U Decap Recently there has been much interest in two integrated circuit which were originally designed to receive FM radio and DVB-T TV (as used in Europe). Some enterprising people quickly realised that since they were based on software-defined techniques they could be quickly re purposed...

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Bad electrolytic capacitor teardown

Monday, December 19th, 2016

Teardown and analysis of a bad electrolytic capacitor from Electronupdate: So, there sitting in a dumpster is what looks like a perfectly good monitor... some of the protective plastic on the base was never even peeled off. A quick power up showed why it was tossed: it simply did not...

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Teardown of a Vivitar Rapid battery charger

Wednesday, December 14th, 2016

Kerry Wong did a teardown of a Vivitar rapid battery charger for the NP-FW50 lithium-ion battery pack used in Sony A6000 digital camera: The circuit board itself though looks surprisingly clean and well designed. It does not use any dedicated lithium ion battery charging ICs however. Rather a MC34063A buck/boost...

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LED candle effect: Tear down and decap of a controller

Monday, December 12th, 2016

[embed]http://www.youtube.com/watch?v=ndXQex_spS8[/embed] A teardown video from Electronupdate: A dollar store item which implements a flickering candle effect using and LED. A look at the technology: linear feedback shift register or ROM based? Let's decap the controller and take a look at the silicon die to find out! More details at Electronupdate blog.

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  • Edward Mallon: I've managed to get cheap thermistors calibrated to about to +/- 0.2C with 3.3v Arduinos. https://edwardmallon.wordpress.com/2017/04/26/calibrating-oversampled-thermistors-with-an-arduino/ Instead of playing whack-a-mole with the various sources of...
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