Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [continuity]

Checking of an electric circuit to see if current flows.

41 questions
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How would I test the continuity of an anti-static wrist band?

I am looking to purchase some anti-static gear for when working on electronics(I'm assuming all electronics should be worked with on an anti-static pad, that's correctly grounded, correct?), and noticed in some reviews there are mention of not…
XaolingBao
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Can continuity test cause component damage?

In order to test some tracks on a mounted PCB, I would like to use a multimeter for continuity test. However, then I measured the open-circuit voltage of two multimeters at hand, and the results were: Fluke 87 V: 7.3 V Keysight 34465A: 9.4 V Both…
EquipDev
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Any way to test continuity of a potentially live circuit?

I'm trying to add an indicator to a relay circuit; specifically, I want to know if it's open or closed in a way that can detect contact welding. (I considered a DPDT relay, but it looks like these could fail with one contact welded while the other…
Matthew
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Digital Multimeter "Continuity test" only one single beep

Well I have two electronic circuit, one is broken and the other is solid and working. While I am making Continuity test with Fluke Multimeter on working electronic circuit, the bip voice heared only once time. but broken part is giving continutiy…
mehmet
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1 answer

How to add a LED to a Multimeter for use it with the buzzer in continuity testing?

I want to add a notification LED to my digital multimeter which i need to glow with the multimeter`s inbuilt speaker (piezo/buzzer/beeper) while in Continuity testing mode. MM Model : DT830D If i have no other option except to replace the speaker…
Amit Kumar Agrawal
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2 answers

Separating Phase and Neutral in AC?

I need determine if a cable is connected to a wall-socket (230V) on the other end with a timer in-between. 230VAC---TIMER---CABLE Depending on how the timer is plugged in, it can either cut the phase or the neutral. If the timer is "ON", then it's…
Niclas
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Forcing current on capacitor tied to ground

I have a device with a capacitor tied to ground. If a negative current of 1 mA is being forced out of that pin, I am trying to better understand capacitor operation in this area. My questions are as follows: Is the subsequent voltage measurement…
Ted
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How to utilize USB-Type-C connector as a normal connector?

I designed two custom PCB boards with one acting as my main Sensor Board and having a Controller (ESP32) interfacing all the sensors and peripherals. The other board is a programmer board that houses a CP2102 circuitry for converting USB protocol…
Ash Ketchum
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Simple wire continuity tester, but also needs to check shorts

I am trying to create a simple cable tester, that needs to check continuity of a multiwire cable. My first thought was to connect all wires at one end to a positive voltage, and connect LEDs at the other end. If there are 5 wires inside the cable,…
R2D2
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high-resistance continuity detector

I'd like to build a device that can detect a weak electrical connection, likely in the domain of tens of megaohms up through low gigaohms, so that a circle of people holding hands can trigger the continuity signal. There is a commercially available…
R Zach
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Measured continuity between live and neutral

I was trying to get rid of the humming noise coming from my speakers in my hi-fi system. It is an old piece of equipment from back when the UK appliances did not come with the mains plug and you had to add it yourself. I noticed that the amplifier…
Javier González
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Continuity with NodeMCU on metal door

I want to have a sensor to let me know if a door is locked or not. I've placed two wires inside the lock mechanism of the door, so when the door is locked the continuity test on the multimeter make a sound, if is unlocked it doesn't make a sound (no…
David Magalhães
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Reading values on continuity test but there is no beep

When checking traces of my PCB I realized that checking continuity between one of the output trace and GND some values appear on multimeter screen but the buzzer does not beep. On the Vcc trace there are two different capacitors. Does that depend…
agenel
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Is it possible that I fried an MCU pin by performing a continuity test

I have a microcontroller (dsPIC33EP64GS506, 64-pin, TQFP, link to its datasheet), which doesn't seem to work on 2 GPIO pins (pins 4:RC0 and 11:RC11), whereas all other pins are functional. The problem with these two pins is that they are directly…
Marko Gulin
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Can a DMM continuity probe fry an IC?

I just finished soldering a QFN package to a breakout board, and was about to go at it with my multimeter in continuity testing mode to check for bridges, when it occurred to me that some semiconductors can be damaged by negative voltages. I presume…
Sneftel
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