testing components | Electronics Repair And Technology News

3 Pins On-On-Off Self-Lock Tactile Switch

Jestine Yong — Sat, 10 May 2025 06:46:18 +0000

(This switch is used in LED FLASH TORCH LIGHT) Normally Flash lights comes in two to three working Mode this switch is used for two working mode. 1) Long-distance with small angle focus area. 2) Short-distance with wide angle focus area. (Coverage angle & distance of light focus is […]

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Mini Tactile ON/OFF Switch Confusion

Jestine Yong — Sat, 01 Mar 2025 09:22:29 +0000

Just came across same looking Two Different Working Types Mini Tactile On OFF Switch under one heading. “6 Pin Push Tactile Mini DPDT ON/OFF Self Locking Switch” One day I got a phone from my friend, he need some electronics spares for his son, who is in engineering […]

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Should You Test Resistors OnBoard Or OffBoard?

Jestine Yong — Sat, 20 Nov 2021 01:53:10 +0000

I often got technical questions from my training students and one of the most common questions was about whether to test or check resistors onboard or offboard. My answer to them was it depends. For your information, resistors in any circuit board are often connected in parallel to some other parts. It can be connected […]

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How To Test Quartz Crystals Found In Watches

Jestine Yong — Thu, 25 Apr 2019 13:24:44 +0000

This article will I think be very interesting for those of us who want to test those special tiny common quartz crystals like used in all modern electronic watches and all sorts of timers. Especially if you like me have a couple of them […]

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Four Meters To Test Tank Capacitor (OL)

Jestine Yong — Fri, 06 Jul 2018 04:29:54 +0000

In these days it is easy to watch 4726 different satellite tv channels in ones living room. One 97 cm offset Dish and 4 LNB’s to receive all FTA 13, 28.2, 19.2 satellites and one paid Dutch Canal Digital provider on Astra 23.5 channels. And with […]

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STK IC Tester

Jestine Yong — Fri, 18 Sep 2015 04:01:13 +0000

I got one Sony FH-909R for service, with the complaint ‘no audio output’. On checking, it was found that the STK4152MkII was getting hot and high voltages were present in the speaker outputs, activating the speaker protection relay to shut it off. From my experience and after doing […]

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How to Measure The Voltage Rating Of A Zener Diode

Jestine Yong — Tue, 15 Sep 2015 03:24:39 +0000

In this document, I show you how to measure the voltage rating of a zener diode, when there is no labeling on or if it is unreadable. Be carefully, because I show you a method with a lab power supply, and if you not really know the elementary […]

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