Questions tagged [testing]
Proving the proper operation or finding faults in an electrical device. It can be done using electronic test equipment or by a software-based simulation.
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Tinkercad multimeter doesn't work [closed]
Measuring voltage and current in Tinkercad, tell me why the voltage does not change when connected in series and the current in the circuit does not change when connected in parallel.
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How to test Keychron K3 Pro PCB LEDs
After plugging Keychron K3 Pro keyboard to USB port on Tesmart KVM switch (used not original power adapter maybe it worked not stable), after 10 min of working keyboard and mouse unplugged and light ...
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3.3V regulator and Comparator not working as anticipated
This is my first time designing something like this so excuse my inexperience. My objective here is to create a simple circuit for checking if a particular component is good or has been damaged. From ...
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What ways can I test an NiMH battery aside from capacity
In my current job, I take used prius batteries and recondition them. I put them on RC chargers and the modules through charge/discharge cycles to both measure and raise the capacity. They have an ...
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Test that plug is wired correctly
I am looking to build a tester that is verifying that 12 VDC connectors are wired for the correct polarity. It will have a series of plugs for a wiring harness and a switch for each one with a red ...
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How to test potentiometer with 4 In Line terminals [closed]
I need to test 3 identical Claro potentiometers that have 4 In Line terminals, (not 3 together and one elsewhere as others have asked about).
These are Claro EPVR/341 potentiometers that are also ...
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How to confirm PNP transistor is valid?
I am practicing with some basic circuits based on bipolar and MOSFET transistors and have faced with an interesting behavior. I have to extract my PNP transistor from a circuit and have found it ...
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Semiconductor device testing [closed]
I'm a graduate engineer who's recently started a job testing silicon wafers consisting of both power MOSFETs or diodes and some IGBTs.
Unfortunately there's little in terms of support and training ...
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How do I test a MOSFET/IGBT for its maximum current and maximum voltage mentioned in the datasheet practically?
I am using an IGBT from Infineon (IGW25N120H3FKSA1). The datasheet mentions that the absolute maximum ratings for the IGBT are Vce(max) = 1200 V and Ic(max) = 25-50 A (depending on temperature). How ...
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Ethernet cable testing
I'm working on designing a device to identify ethernet cables after they have been installed. I've designed a circuit that will send a DC high signal via one wire and then returned over the remaining ...
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What is expected resistance of MCU power supply pins?
I've assembled several identical boards and one of them does not work. Visual inspection does not show any bridges, but it is hard to tell with LQFP pitch. The voltage on power rail was zero. I've ...
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Near field probing on a large DUT
I "inherited" a set of boards (it's an elevator controller) that have no 'explicit' EMC countermeasures except a single CM choke for the CAN bus. And, of course, now the whole thing need to ...
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How can I verify the operating specification of a PCB? [closed]
I have a couple of PCBs which work with each other: core PCB, middleware PCB and a peripheral PCB. All of them have a voltage and current rating along with protection circuits.
What tests can I ...
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Can diodes be tested successfully in situ? [closed]
I have tested a bunch of diodes in situ on a washing machine PCB. One comes back as expected with values of 0.6v and OL depending on testing direction. The rest show the same 0.6v in the expected ...
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What type of probes are used to connect to plated-through-holes without soldering a pin into the socket? [duplicate]
Are there probes that are designed to insert snugly into 40-mil holes (about the size of those needed by a DuPont connector)?
I am thinking of something that looks like a banana plug with springs on ...
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