Teardown of an Amrel PPS 35-2 programmable power supply

Kerry D. Wong did teardown on a single-channel Amrel PPS 35-2 programmable power supply: A while back, I did a teardown on a dual-channel Amrel PPS-2322 programmable power supply, and was quite impressed by its solid construction. Recently, I found another Amrel power supply on eBay and this time it is a single channel version […]

A look inside a Marconi signal generator

A closer look at a Marconi Instruments signal generator @ jaeblog: Recently I got a Marconi Instruments 2019 signal generator, capable of generating signals from 80Khz up to 1040Mhz. It can also modulate these signals with AM, FM and more. This instrument is from the mid 80s and is, as far as I can test, […]

Teardown and modification of an Electrophoresis power supply

Kerry Wong did a teardown of an EC600-90 electrophoresis high voltage power supply: Electrophoresis power supplies are commonly found in biology and other life sciences laboratories. These power supplies are usually capable of supplying high voltages and high currents required for gel electrophoresis–a method used for separating DNA, RNA and other protein fragments based on […]

Teardown of a Marconi 2305 modulation meter

Kerry Wong did a teardown of a Marconi 2305 modulation meter: I picked up a Marconi 2305 modulation meter off eBay the other day. As the name indicated, a modulation meter is used to measure the modulation characteristics of a source signal. The Marconi 2305 is capable of measuring amplitude/frequency and phase modulated signals from […]

Teardown of a LogiMetrics A300/S traveling wave tube amplifier

 LogiMetrics A300/S TWTA teardown by Kerry Wong: I just picked up a LogiMetrics A300/S 2 GHz to 4 GHz (S band) traveling wave tube amplifier (TWTA) on eBay. I had done an extreme teardown of an HP 493A TWTA a while ago and it was quite fascinating to see what’s inside of a TWT. This LogiMetrics […]

Crystal oscillator teardown

Here’s a tear down of a crystal oscillator and a look at the silicon controller from Electronupdate:  Inside is a ceramic circuit board.  Ceramic has a low coefficient of thermal expansion which is probably very desirable here. It will also not absorb moisture.  All of this would affect the frequency. More details on Electronupdate blog. Check out the […]

Teardown of a Piezoelectric vibrating gyroscope

Kerry Wong did a teardown of an old analog piezoelectric vibrating gyroscope: Gyroscopes nowadays are based on micro-electro-mechanical systems (MEMS) technology. They are low cost and extremely miniaturized. A device combing both a three-axis gyroscope and a three-axis accelerometers (sometimes these devices are referred to as 6DOF devices) such as the MPU-6500 for example can be […]

Teardown of an Array 3711A 300W DC electronic load

Kerry Wong did a teardown of an Array 3711A 300W electronic load: I have made many electronic loads in the past. For instance this simple harddrive cooler housed small dummy load, this more sophisticated constant current/constant programmable load and this heavy-duty electronic load that is capable of sinking over 1kW under peak load. In this […]

Inside a two-quadrant power supply – Agilent 66312A teardown and experiment

Kerry Wong did a teardown of an Agilent 66312A dynamic measurement DC source: Typically, a lab power supply can only operate within a single quadrant. Take a positive voltage power supply for example, it can only output or source current. If any attempt is made trying to sink current into the power supply by connecting […]

Microsoft “Intellimouse” teardown

Microsoft “Intellimouse” teardown from Electronupdate: Before the advent of optical mice, the go to technology was a steel ball which moved two drive shafts to indicate position. A good example of this is this Microsoft “Intellimouse”. As expected the electronics are built around a small micro controller Check out the video after the break.

Teardown of a BK precision 1696 programmable switching power supply

Kerry Wong did a teardown of a BK Precision 1696 programmable switching power supply: My original plan was to find a replacement LCD and restore the unit to its original full functionality. But the LCD used in this unit is likely specifically made for the 169X series of power supplies and through some initial research […]

Battery adapter teardown and Sony A6000 power-off current draw

  Kerry Wong did a teardown  of a battery adapter for the Sony A6000 mirrorless digital camera and measured the poweroff current draw of the the camera: With the battery adapter on hand, I decided to take a look at what’s inside and then use the adapter to measure the power-off/stand-by current of the Sony […]

65C02: Tear down, a look at the CMOS version of the 6502 CPU

A teardown video from Electronupdate: The CMOS version of the commercially significant 6502: a processor architecture which launched the personal computer era. This particular version was plucked off of an embedded industrial controller… a place where this processor still finds design wins.

Tutorial, experiments and teardown of a 77GHz automotive FMCW radar module

Tutorial, experiments and teardown of a 77GHz automotive FMCW radar module from The Signal Path: In this episode Shahriar explores the principle operation of automotive FMCW radars. Thanks to a donated automotive radar module, various components of the system can be examined and explored. The PCB reveals three die-on-PCB ASICs responsible for generating and receiving 77GHz […]

Sonicare toothbrush teardown: microcontroller, H bridge, and inductive charging

Ken Shirriff did a teardown of a Sonicare electric toothbrush: The photos below show the top and bottom of the toothbrush internals. I expected to find a simple, low-cost mechanism, so I was surprised at how much complexity there was inside. The vibration mechanism (right) is built from multiple metal and plastic parts screwed together, requiring […]

Reverse engineering a simple four function calculator: die decap

Electronupdate did a teardown and analysis of a cheap four function calculator: It’s such an amazingly old looking die Even with 400x magnification it would not be too hard to reverse engineer back to a schematic! This must be a very old design indeed. When one thinks of high-tech it’s always the new-new thing… however […]