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Category: Reviews

DROK DC to DC Step Down Buck Converter Module

20th August 201512th March 2016 Louis Scully 1 Comment

In this review I will take a close look at the DROK DC to DC Step Down Buck Converter Module which uses a LM2596 Buck Converter IC The module also includes a digital voltmeter which can display either the input or output voltage. The output voltage is set by two push buttons. After fully testing […]

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DC-DC Boost Converter Test & Review

16th April 201512th March 2016 Louis Scully Leave a comment

Review and Test of a cheap DC to DC Boost Converter Module which uses the XLSEMI Integrated Circuit XL6009. Several modules are tested under different input voltage and output load conditions.

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Peak Electronic Design Zener Diode Analyzer

13th April 201513th March 2016 Louis Scully Leave a comment

New product review of a Zener Diode Analyser designed and manufactured by Peak Electronic Design Ltd. This is a nice little analyser which supports most Zeners, Avalanche diodes and reference diodes from 0V up to 50V. More details from web link below: http://www.peakelec.co.uk/acatalog/zen50-zener-analyser.html

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Keithley 225 Current Source Review & Teardown

10th April 201513th March 2016 Louis Scully 1 Comment

Review and teardown of a Keithley Instruments model 225 Current Source which dates back to 1976. These units are still very accurate today, with an accuracy of ±0.5%. A range switch and 3 decade switches can provide a current output from 0.1 nanoamps to 100 milliamps.

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Time Electronics 404S & 404N DC Millivolt Source Teardown & Review

14th March 201513th March 2016 Louis Scully 3 Comments

Here we review two Time Electronics Ltd. DC Millivolt Source calibration units. They use a precision reference zener diode, low temperature coefficient resistors and thumb switches to select a precise voltage accurate to 1 Micro Volt. They have 3 ranges and an accuracy of ± 0.05%.

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Fluke 8842A Digital Multimeter Review & Teardown

14th March 201513th March 2016 Louis Scully Leave a comment

A closer look at a Fluke 8842A Precision Multimeter and teardown. Manufactured in the 1990’s and had an accuracy on the D.C. ranges of up to ±0.003%. A very high quality meter.

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Precision Voltage Reference Modules

9th March 201513th March 2016 Louis Scully 1 Comment

Review and teardown of 3 types of Precision Voltage Reference Modules which are useful for checking the calibration of Digital Multimeters.

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Thurlby 1905A Intelligent Digital Multimeter Review & Teardown

2nd March 201513th March 2016 Louis Scully 2 Comments

Review and teardown of the Thurlby 1905A Intelligent Digital Multimeter was designed and manufactured in the 1980’s by Thurlby Electronics Ltd. The meter is a 5½ digital manual ranging multimeter with keyboard programmable computing and data logging facilities. The basic accuracy is ±0.015% on the D.C. ranges.  

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Datron 1065 Autocal Digital Multimeter Review & Teardown

28th February 201513th March 2016 Louis Scully Leave a comment

Datron 1065 Autocal Digital Multimeter review and teardown.

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Muirhead D825G Decade Resistance Box Review & Teardown

25th February 201513th March 2016 Louis Scully 1 Comment

Muirhead D-825-G Decade Resistance Box review, teardown and calibration check. Now 50 year old but still in calibration tolerance.

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