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Questions tagged [continuity]

Checking of an electric circuit to see if current flows.

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4answers
75 views

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 ...
0
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1answer
52 views

Continuity testing - Why does swapping DMM probes give differing results?

Continuity query - Can anyone explain this? Circuit is a simple 12v DC, wired as follows -battery pos to bulb to spst switch back to battery earth. Testing with DMM in the dedicated audible ...
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1answer
163 views

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 ...
1
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2answers
50 views

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 ...
2
votes
1answer
247 views

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 ...
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0answers
79 views

Reverse Continuity Testing

I am interested in testing some low voltage cables for their quality. For example, USB, audio and Ethernet cables. Testing continuity is simple, but I want to know if these cables may momentarily ...
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3answers
81 views

How to test for shorts on a breakout?

Working on LoRa project with the RFM95W. Most online resources like 1 and 2 suggest using a PCB since the module itself is quite small and hard to work with; but where's the fun (and learning) in ...
0
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2answers
28 views

Figuring out if an led strip/matrix has a short or not with a multimeter

I am relatively new to electrical work, mostly stay on the software side of things. I recently soldered header pins onto a few led matrixes I have. They are 3 wire leds (power, data, ground). I'm ...
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1answer
60 views

WIll the multimeter continuity test on the SOIC - DIP adapter spoil my IC?

IC : L9637D for ISO 9141 bi directional serial comm. Multimeter: Mastech I am mounting an SOIC 8 IC on an adapter(regular Soic to dip adapter), so I can mount the adapter on a bread board for use. ...
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0answers
49 views

Continuity Testing

I have a fluke 381 and i was talking to another tech about testing voltage sensing fuses in a live Automatic Transfer Switch, the fuses are 2 Amp HRC type fuses and i made the comment that i have in ...
0
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1answer
62 views

Mysterious current flow through socket

I was measuring a device that isn't working with an continuity meter. I've identified this socket as the problem. It sits between the batteries and the rest of the device, I guess for loading the ...
1
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1answer
1k views

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 ...
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1answer
121 views

How to know if a SCR is still working?

I'm using a TIC116 to control the power over an electric grill. However, I didn't use a heatsink and it got very warm. On the data it says that its upper limit is 110 °C. I suspect that the gate is ...
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1answer
40 views

Laplace Transform without given continuity variables

simulate this circuit – Schematic created using CircuitLab So I was trying to solve problems in preparation for an exam regarding Laplace Transforms. I was able to solve some problems and then ...
0
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4answers
194 views

is graphene not inheriantly conductive?

I ordered some graphene off ebay to test on some applications and I am unable to get continuity. I applied a layer of graphene on some two sided tape, made sure the adhesive was completely covered, ...
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1answer
77 views

How to measure continuity between two FPGAs

I have two FPGAs, one will contain test chip and one contain memory and I2S interface and some control signals for jtag. Right now the chip is not available on the board but its connections are such ...
6
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4answers
4k views

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 ...
1
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1answer
295 views

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 ...
3
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2answers
436 views

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 ...
1
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1answer
553 views

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 ...
1
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3answers
165 views

Detecting a break in continuity where no voltage drop occurs

I have a solar charger on a vehicle which I need to protect: Schematic is down there... The charger connects to the main battery, and the solar panel, but the manual specifically states that you MUST ...
1
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1answer
514 views

Two multimeters in continuity mode, only 1 buzzer

I have two identical digital multimeters both with new batteries. I set both to continuity mode and connected the leads to each other. Only one of the meters buzzers went off. They both work ...
0
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2answers
8k views

Should continuity test be performed when the device is off? Why?

Can an electronic circuit which is passing currents be tested by a multi-meter's continuity test? Would it be meaningful or harmful? Why?