UT81B from Uni-Trend is a scopemeter. It is a multimeter with some basic oscilloscope functions. This multimeter can measure what you expect from a normal multimeter: DC V up to 1000V, AC up to 750V, resistance up to 40Mohm, frequency up to 10MHz, capacitance 100uF, AC/DC current 10A (and of course it has also a →
Safety must always remain priority number one when doing measurements with multimeters. Working safely, while making electrical measurements, is not rocket science. It’s a simple combination of careful planning, safe practices and using the right tools in the right way. The more voltage and current is present in the circuit, more careful you have to →
EEVblog #60 – Fluke 117 Multimeter Review and Teardown is an interesting review video on a Fluke multimeter. If you are looking for cheaper multimeters check $50 Multimeter Shootout from the same source. You should also look Why cheap multimeters suck. →
The monkeys got my multimeter article has an interesting video that shows a really crappy design aspect of this IDEAL multimeter. Was this caused by a design or specification problem is hard to say. Very probably, for an economy DMM like this one, the ability to operate the buttons without rear support (i.e. your own →
A normal way to troubleshoot ground loops problems in audio systems is to listen to the audio signal at the mixer with headphones. If the buzz exists at the mixer then do the following: One by one, disconnect the inputs and outputs to and from the mixer and note if the buzz decreases. This same →
There are applications where measurement of low resistances are needed. Measuring low resistance helps identify resistance elements that have increased above acceptable values. How you measure low resistances below one ohms? Most multimeters aren’t accurate below 1 ohm. Occasionally, you’ll need to measure electronic parts with very low resistances, such as wires, switches, current-sense resistors, →
Inductive cooker powers a LED wirelessly. The kettle needs to be here to keep the inductive stove to be turned on (it will turn off when no big metal object is detected on heating area). This LED circuit worked for me for a short test, but there is no guarantee that it will work for →
If the modern HiFi amplifier or tube amplifier clips when you use it to play back audio recording, you are doing it wrong. With tube guitar amplifiers pushing it to clipping to get certain distorted sound is often intentional. Modern take to get the same guitar sound is to use DSP based effect pedals to →
A high voltage probe allows an ordinary voltmeter to measure voltages that would otherwise be too high to measure or even destructive. Typically normal multimeters are typically designed to measure voltage up to hundreds of volts or one kilovolt. If you need to measure higher voltage, you need to use a high voltage probe. A →
If you’re anything like me, chances are that you have a lot of gadgets in your home or office. But how much power are these gadgets using — and wasting? A common question is how to measure power consumption for devices. Some people are coming at this from a perspective of pure curiosity, others are →