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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...
View ArticleMeasured 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...
View Articlehigh-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...
View ArticleContinuity 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 continuity...
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Circuit to know when two batteries are connected to each other
I'm using a Victron Cyrix (12V 120A) Smart battery combiner to connect the starter and the leisure battery in my RV. I wanted to know when the two batteries are connected to each other, but...
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Why no conductivity with this wire?
These are two ends of the same cable:The cable comes from an old headphone set and I want to re-purpose it.What are those copper looking wire strands? I could not get connectivity between them and the...
View ArticleCan 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...
View Articlebest way to batch test continuity?
I'm batch making pcbs that have fpc connecters with high pin count (50) and fine pitch (0.5). I'm soldering these by hand and was wondering how I could batch test continuity? at the moment I am going...
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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...
View ArticleBasics - help with resistance reading
I'm trying to solve an issue with my eletric radiator and more specifically either the heating element or control panel (circuit board.)I've tested the element with a multimeter and it is showing what...
View ArticleSimple 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...
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Continuity test isn't working on a ribbon wiring harness
I have extracted this wiring harness from the valve body of the transmission. But when I did a continuity test with a multimeter to diagnose if there was any problem with the wires, there was no...
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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...
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Why are two of the wires in my ignition switch showing reversed continuity?...
My motorcycle manual indicates that when the ignition switch is in the ON position, continuity should exist between the red and brown wires (which it does) and also between the black and black/white...
View ArticleMistakenly performed continuity test on the supply voltage (+12V). How can I...
I was testing continuity with ground in a breadboarded circuit and accidentally touched the supply rail (12V). My multimeter is a greenlee dm-820a. Everything seems to be working fine, but I am...
View ArticleForcing current on capacitor tied to ground [closed]
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...
View ArticleWhy does the multimeter detect continuity between live and neutral of my...
I was doing some random checks with my new multimeter and while doing a continuity test I heard the beeping noise when connecting the multimeter to the live and neutral ends of the plug for my 220v...
View ArticleDigital 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...
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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...
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Polarity of a circuit
TLDR: Trying to determine polarity of pads, findings in the pics.I’m new to electronics.I’m trying to replace an annoying proprietary barrel connector with a direct wire to a dc power supply. I...
View ArticleTwo 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...
View ArticleAdd buzzer to multimeter
How can I add a buzzer to my EverStart Digital Multimeter 10711WDI circuit board, so that it buzzes when there is continuity?
View ArticleHow to know which component in a PCB is causing the short if they're...
The problem is that I have an increased current in my whole circuit than should be, the required current is 0.26 amp, but I have 0.45 amp.After conducting continuity tests, I found that one of the...
View ArticleRibbon Cable Pin Assignment
Preface: I am complete novice at electronics and this is my first project.I am trying to connect two PCB together with a 10pin ribbon cable. The ribbon cables I made (and bought) are all showing...
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Why 230 V shows up in a staircase light circuit even though 'live' is...
There's a staircase light circuit in my house similar to the one shown below.I disconnected 'live' from the switch on the left and measured the voltage between its 'L1' terminal and neutral and then...
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In circuit debugging using continuity test on DMM give un-predictable results
I did a continuity test, between a ground point of my PCI card (audio) and a resistance (47Ω SMD). No beeping sound on both ends of the resistance.After I de-soldered the resistance from the board, I...
View ArticleHow 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...
View ArticleInverter battery charging [closed]
If I connect a battery charger to my inverter AC output to charge the inverter's battery ,can I get a continuous power supply?
View ArticleDoes continuity equation applies for magnetic charge and magnetic current?
I wonder if, since we are capable of defining a charge and some magnetic currents, we can apply the continuity equation to them in such a way that:\begin{equation}\frac{\partial...
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How can I make a continuity check for a model rocket igniter?
I am currently working on a model rocket controller. It should fire a rocket model using a standard model rocket igniter (e-match). To ensure safety, I want to check for continuity trough the igniter....
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