Measurements technics
Measurements technics - oscilloscopes, voltmeters, multimeters, generators - review, tests
- 03.08.2017 - 23:35Sensors are either analog or digital. Analog values are read in via an A-D input, whereas for digital signals a simple Port connection frequently adequate. In some cases, however, sensors have dual outputs, one analog and one digital.A glance at the sensor combo kit (available from Elektor [1]) reveals seven superficially identical PCBs equippe...
- 09.04.2017 - 21:18Checking of an electrolytic capacitor without an LCR meter is not free from hassles. Here is a simple solution for checking the serviceability of a capacitor.Circuit and workingFig. 1 shows the circuit diagram of a simple capacitor tester which can be housed in a small matchbox. It is basically an oscillator circuit comprising two transisto...
- 12.03.2017 - 23:43Sometimes you do not get proper output from a circuit due to faulty ICs. This circuit can test timer 555 and op-amp 741 ICs, which are commonly used in projects, to save you from this problem.Circuit and workingFig. 1 shows circuit diagram of the tester which is built around the very 555 timer (IC1) and the op-amp 741 (IC2) that are to be t...
- 10.03.2017 - 22:58Presented here is a simple realtime clock with temperature logger. The project shows time, date and real-time temperature on the LCD. The logger records the maximum and minimum temperature for each day and can keep entries for 51 days. The recorded temperatures can be viewed any time together with the dates. The temperature is sensed via single-wir...
- 18.06.2016 - 23:34This low-cost detector probe allows you to measure RF signals from below 100kHz up to over 1GHz with your DMM for signal voltages between about 20mV and 10 V RMS. You can use it with a probe or a sniffer loop and you can even use it to measure the voltage across a coaxial cable load and calculate the RF power.T’S NOT DIFFICULT to measure...
- 13.04.2016 - 22:39Get maximum accuracy from your 12-Digit Frequency Counter using this GPS lpps Timebase. It connects to the external timebase input of the counter and will let you achieve measurement accuracy close to that of an atomic clock. You can either build it into the frequency counter or use it as a separate module.ARE YOU KEEN to build the new 12 -Digi...
- 09.04.2016 - 23:54LAST month, we looked at some issues which arose from the simulation of a binary counter. A question was posted by perro on the EPE Chat Zone asking if the unwanted behaviour of the circuit was due to a problem with the Circuit Wizard simulation he had used, or was something to do with the circuit itself. Perro’s circuit was an asynchronous r...
- 20.11.2015 - 06:15With recent developments in technologies like MIMO, femtocell and LTE, the RF device testing is reaching new dimensions. Read on to find out what’s new in this field.Millions of devices these days operate and communicate in radio frequency (RF) range, which spans from 3kHz to 300GHz of the electromagnetic spectrum. From radio frequency id...
- 06.04.2015 - 23:02Power is not limited to the simple equation of voltage multiplied by current. From calculating the efficiency of a home appliance to determining the range of a cell tower, power measurement has a major role to play in today’s systems. this article takes you through, very briefly, the latest trends in power analysers, power meters and power su...
- 12.02.2015 - 20:26Digital oscilloscopes, being expensive, have always been out of reach for many. But this doesn’t make them less desirable. Fortunately, test and measurement companies have sensed this situation and started developing low-priced oscilloscopes with reasonable quality and features. So we now have several wonderful low-budget options. Let us take...