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Kerry D. Wong

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Teardown of a Hantek 2D72 3-in-1 Handheld Oscilloscope/DMM/AWG

June 26, 2021September 11, 2021 kwong

Hantek‘s 2D72 (and 2D42) is the latest handheld oscilloscope in the 2000 series that combines an oscilloscope, a multimeter and […]

Electronics 2D42, 2D72, AD9288, Arbitrary Waveform Generator, AWG, CS7721, DAC902, DMM, EL5166, Hantek, LCMXO2-1200HC, Multimeter, Oscilloscope, Owon HDS200, Spectral Purity

Teardown of an LW-3010EC Programmable Power Supply

May 28, 2021May 28, 2021 kwong

I just received a Topshak LW-3010EC programmable power supply. Like many cheap lab power supplies out there, this is yet […]

Electronics 74HC595, DK112, Longwei, LW-3010EC, Programmable Power Supply, SG3525A, STC 15F2K60S2, TNY280GN

Teardown of a UNI-T UT61E+ True RMS Multimeter

April 4, 2021April 5, 2021 kwong

UNI-T‘s UT61E+ is a 22,000 count true RMS multimeter. It was released towards the end of last year and is […]

Electronics CP2110, ES232, Fuse, HC32L130, HY2613B, Metal Oxide Varistor, MOV, NTC, Teardown, UNI-T, UT161E, UT61E, UT61E+

Visualizing a Full Bridge Rectifier

March 20, 2021March 22, 2021 kwong

Full bridge rectifier (full-wave bridge rectifier, diode bridge or sometimes just simply referred to as bridge rectifier) is something that […]

Electronics Bridge Rectifier, Diode Bridge, Full Bridge Rectifier, Full Wave Bridge Rectifier, LED, UTG962, UTG962E, Visualization

Teardown and Testing of a 1500W Pure Sine Inverter

January 30, 2021January 31, 2021 kwong

A while back, I did a teardown of an 800W Reliable Electric Pure Sine inverter. In this blog post, let’s […]

Electronics 85GT33SW, CNSWIPower, FGA180N33, IGBT, Inverter, IRF1404, LiFePO4, Load Testing, Pure Sine, PureSine, STTH6006W, Teardown

Lab Power Supply Build Using Old Power Bricks

January 5, 2021January 5, 2021 kwong

Over the years, I have accumulated many used computer power bricks. Although I could just use them by themselves to […]

Electronics Comparator, LM338, LM393, Power Brick, PSRR, Relay, Switching Power Supply

Teardown Pictures of an HT118A Multimeter

November 26, 2020November 26, 2020 kwong

I did a review and teardown of an HT118A multimeter. It is a rather generic 6000 counts true RMS auto-ranging […]

Product Reviews HT118A, Multimeter

Powering Up an HP YIG Tuned Oscillator

October 16, 2020October 16, 2020 kwong

I was going through some of the components I accumulated over the years and stumbled upon a Hewlett Packard YIG […]

Electronics 5086-7023, Array 3711A, HP, HP 6181C, HP 8566B, HP 8660C, Wavetek 907, YIG, YIG Sphere, YIG Tuned OScillator

Teardown of a Cel-Fi Go X Cell Signal Booster

July 5, 2020July 7, 2021 kwong

In the area where I live, the cell phone reception is spotty at the best. Even though I am only […]

Product Reviews, Teardowns ASIC, Cel-Fi, Downlink, Echo Cancellation, ETSI, FCC, Go X, IP66, Jitter, LNA, LPDA, Matched Filter, Multi-Path Fading, NEMA 4, Nextivity, PCI, Repeater, RSRP, RSRQ, RSSI, Signal Booster, SINR, Teardown, Uplink, Yagi

Non-destructive Testing of Fuses

April 12, 2020April 12, 2020 kwong

A fuse is a sacrificial device for the protection the rest of the circuit in an over-current situation. There are […]

Electronics Array 3711A, BK Precision 2709B, Constant Current, Electronic Load, Experiment, Fuse, HRC Fuse, Melting Integral, Non-destructive Testing, Polymetric PTC, PPTC, PTC, Resettable Fuse, Temperature Coefficient

Making an OBD-II Solar Trickle Charger

March 6, 2020March 6, 2020 kwong

I have been travelling quite a bit for the last year or so and have not been able to drive […]

Electronics Blocking Diode, OBD II, Schottky Diode, Solar Panel, Trickle Charger

Teardown of an Amrel PPS 35-2 Programmable Power Supply

December 1, 2019December 1, 2019 kwong

A while back, I did a teardown on a dual-channel Amrel PPS-2322 programmable power supply, and was quite impressed by […]

Electronics AD7541, Amrel, Array 3711A, GAL16V8B, M58725P, MPM81C55P-2, PPS 35-2, PPS-2322, Programmable Power Supply

Teardown of a Keithley 230 Programmable Four-Quadrant Voltage Source

October 25, 2019October 1, 2022 kwong

The latest addition to my lab equipment is a Keithley 230 programmable voltage source which can output up to ±100V. […]

Electronics, Teardowns AD544, GPIB, HP-IB, IEEE-488, Keithley 196, Keithley 230, MJ15011, MJ15012, Teardown, TMS9114A, Voltage Source

Teardown of a Microwave I/Q Down Converter

September 29, 2019September 29, 2019 kwong

I recently picked up a downconverter box on eBay. My original plan was to use the enclosure for another project […]

Electronics Branchline Coupler, Downconverter, Frequency Mixer, I/Q Quadrature Mixer, Quadrature Mixer, Wilkinson Power Divider

Teardown and Modification of an Electrophoresis Power Supply

August 17, 2019August 17, 2019 kwong

Electrophoresis power supplies are commonly found in biology and other life sciences laboratories. These power supplies are usually capable of […]

Electronics 2N6344A, 68HC11, AD654, E-C Apparatus Corporation, EC600-90, Electrophoresis, High Voltage, IRFP450, LM566, LT1014DN, MOC3063, MS6264L, Power Supply, TC1426CPA, Thermo Fisher Scientific, Thyristor, TRIAC, VCO, Voltage Controlled Oscillator

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Tools & Libraries

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