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A ceramic capacitor has a resistance of many Megohms. My digital multimeter shows infinity when measuring the resistance of a good ceramic capacitor and its maximum reading is 40M ohms.
For sure you can inspect motherboard visualy for parts defects, such as capacitors leaking, MosFETs and other power parts exploding or cracking, melting parts, bad pins in power connector sockets,... also you can replace the broken parts with complete new or with good parts removed from some other motherboards. For scope usage and other signal logi
you are testing your crystal?? how?? crystal can be tested using CRO or a good multimeter capable of reading frequency of that range. @ Paro maheswari: you dont need to insert the controller to check the crstal oscillator. check if the crystal oscillator is connected to controller properly, and see if the capacitor i
Hello Everyone I am new here and would like to ask other forum members of their experiences with any of the following multimeter's: This is the one I thought would be good for
Why do you want to measure the voltage across your current sensor? You can measure the current across it by this multimeter. I think all the multimeters can measure the currents in range from 100mA - 1A now. However the range of current measured by multimeter exist in its datasheet. good luck
good work. Getting an arc can be called success. It might pay to experiment with the coil, to discover its operating characteristics. For instance, if you reduce the operating frequency, it might let the current ramp up some more through the coil.
Can anyone tell me how to check a photodiode is in good condition for use?Will reversing its polarity destroy a photodiode?
Calibration means comparing to a known standard and adjust, if necessary. If you don't have a known accurate standard, e.g. a good RMS multimeter, you can't calibrate and should better rely on precalculated gain factors. i'm getting some value from it. I dont' know whether it is right or wrong Calibration means, that you need to g
Hello, My old micronta 22-193 is faulty. The LCD gives BATT while the batteries are good. The readings on DC are faulty : 0,6 V instead of 1,5 V. The main IC is a SXC 1901F of which I do not have got the datasheet. Does anybody have this datasheet or have the same trouble with this autorange meter ? With my best regards,
Im measure adc pin with a multimeter but it gives good values. So the problem is either with your code, or the analog input pin is damaged. I tried feedback capacitance but nothing changed. Yes, an oscillating OP output should still give an ADC signal. Simply keep in mind, that a compensation cap will be necessary f
better go for micro controller design, old multi-meters used 7106 but now all are using multimeter and the parts count and the input switches can be reduce, 7106 is good for 3.5digit volt meter but for multimeter you have to add more circuits to it,
It's definitely not a good idea to calculate an AC voltage value from a peak measurement, it's effectively the method to introduce maximum error with non-sinusoidal waveforms. No existing multimeter does it this way. You have either rectified value (rectify and average) or true RMS, the latter with higher performance instruments. I don't know yo
When I turn up the volume on one of the channnel of an audio circuit that I devised. It doesn't give any sound untill the pot is about half way turned up. Then it is distorted. It is preceeded by a tone control circuit using op amps. The power output is a push pull arrangement. I checked the linearity of the pot and it seems OK. All the biasi
Unless your digital multimeter has a frequency range (most don't) it's impossible. To measure frequency you really need one of these: 1. a calibrated radio receiver covering the frequency of the oscillator 2. a frequency counter 3. a spectrum analyzer 4. a good quality oscilloscope 5. a GDO. Brian.
I wouldn't call them "good", but you can get a basic DMM from Harbor Freight for $3.99 and they have others from there. I have 8 of them for my lab bench where accuracy is not the biggest deal, so I don't have to use the better ones up. My primary beef with these is the current range series resistance, which is pretty high at the low curre
With a multimeter on diode test setting. First test whether there is any short between Drain-Source, this should indicate an open circuit unless there is an internal protection diode which usually measures 0.6V. Second, test all ther combinations for shorts, e.g. Drain-Gate, Gate-Source. In case of a good mosfet, a voltage at the gate should p
Your the one that ultimatly has to decide if it is "worth it" to you (which depends on what you would use it for). But, Yes $200.00 (US) is a very good price for this scope.
Well, the easiest way is to measure its terminals with a multimeter ( in diode test or resistance mode) and compare the measurements with a reliable one. If you don't have any other MOSFET's in your hand, then you can make these tests with the multimeter: 1 - Most of the time, a faulted MOSFET has at least two of its terminals short circuited.
A typical multimeter won't respond to 10 MHz. It will probably read very low or zero. A good solution is to use an oscilloscope with a current probe as artem suggested. If you don't need to measure DC current, you could use a wideband current monitor instead of a current probe. Here are some nice ones. They cost several hundred US dollars. htt
you mean equipment or components? For equipments: it depends what type of experiment you are doing. But in general you will need: 1-multimeter 2-Oscope 3-Function generator 4-Power supply good luck
The escaped gases from the LEAKED battery have put some short circuit on the COMPONENT's CONTACTS. Try removing the display and WASH the PCB with warm water and soap. Dry it after washing/cleaning with ELECTRIC AIR BLOWER for about 10~12 minutes. Hope will help you get back the proper functions. good Luck :| [color
As Function Generator I use this Fluke/Philips very good As Osciloscope Use tektronix 400Mhz As multimeter an good true Rms from Fluke Or other equal.
According to law of conseravtion of energy getting 100% efficiency is impossible. sometimes multimeters can be erranious. for dc voltage you dont need a True RMS multimeter. twist all the wires if the multimeter and REMEMBER to bypass the input of the Boost regulator with a good electrolytic capacitor for accurate measurement.
Hi ! good idea is to get the LM317T datasheet: Take the IC out from the circuit and use a breadboard + 2 resistors (or 1 resistor and a potentiometer) and a variable DC power supply, this turn this possible to be tested with the multester. THe LM317T is not like a TO220 package bipolar transistor
yoh!..its good to have all the datasheets around, and its good to have the multimeter lying around to do the tracing and stuffs. But mind u, these alone are not enuff to reverse engineer. Fundamentals my friend, the key element to success. I mean that is what i think. Oh, experience is rather a bonus i say..
ur PIc might be damaged ..... do not trust that ur new PIC (i mean if u just bought it from supplier ) is always good i used to buy a new PIC 16F877A from suplier but PORTE wasnt work well .. i was lucky b'caz i bought 2 PICs ....
Very interesting web site, however my professor asked us to look for information on digital, not analog multimeters. There is some good stuff I found in this site that could actually help me: the high-impedance voltmeter. Once more, (thank you) obrigado!
I found this two devices, i.e. BCR5PM (TRIAC) & SM8JZ47 (Triode Thyristor), on a washing machine controller board. Is it possible to 'diagnose/troubleshoot' these devices by using only digital multimeter? If it's not possible, pls advise how to determine those devices are still in good CONDITION? Do you think TRIAC = Triode Thyristor? Thank y
hi, I would like to build some small multimeter as an exercice purpose, I'm ok for the adc measure and results display, but I'm searching for schematics of input probes: how can you input some 200-1000 volts into max 5v for the adc without burning everything and while keeping the good value and the good shape of the waveform ? I must (...)
You can test the IGBT by multimeter at the Diode test position. Emetor Collektor must be open circuit at the two direction (If you see reverse diod this is not problem). Gate Emetor must be open circuit. If you see any short circuit at the any two pin IGBT is mort. But this is not good test...
for a simple (DC) estimation of the SNR, a good 6-digit multimeter can be enough. However, you will have to take care of the design of your test board (connector, decoupling , etc....) especially for sigma-delta ADC where digital output noise can easily affect analog input.
If it is of any help, I fixed mine (Toyota Celica Supra) and a few for a friend that had a car dealership. They were all simple faults like, faulty regulator, diode and some open circuit low value resistors. I just used my eyes, nose and a multimeter. good luck, E