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Introduction  This is the next instalment in my insulation tester review series, in a bid to find a more suitable tester for the type of work that I do. The previous testers reviewed are;   Keysight Insulation Multimeter Failure   Megger MIT420/2 Road Test   Chauvin Arnoux CA6526 Insulation Tester Review   Flir IM75 Insulation Tester Review   Extech MG302 Insulation Tester Review   Di-LOG DL9307 Insulation Tester Review   The RS Pro IIT1500 is marketed by ...
I'm designing a low power IoT in the Cloud framework for the Arduino MKR WIFI series. A firmware proof of concept that uses the low power option of this Arduino as much as possible, only to wake up to make a measurement and beam it to Amazon Web Services (AWS). The framework also reports the battery state. This allows the operator to go charge the battery before the defice runs out of juice. This blog measures the solution's power consumption over long time. It takes in account the time spe ...
  A team from Northwestern University has created a body sensor to help monitor babies in neonatal intensive care units (NiCU). The sensors are wireless, soft and flexible and have an advantage due to replacing other sensors that rely on wires to function. The sensors could be put to use in hospitals within the next two to three years.   Studies on premature babies were collected at Prentice Women's Hospital and the Ann & Robert H. Lurie Children's Hospital in Chicago. They foun ...
Introduction My car battery died recently, and I thought I’d try out an Energizer car jump-starter. This was a new product to me – I had not realized that such compact lithium ion jump starters were available! It reduces the need to find someone else’s car to do a jump-start.   In brief, it is a unit that looks like a USB power bank (it can be used as such) but with a rubber covered flap that has a connector to allow it to connect via a supplied adapter cable to a car bat ...
  Platinum Resistance Thermometer Thermocouple Thermistor Sensor Platinum-wire wound or flat-film resistor Thermo-element, two dissimilar metals/ alloys Ceramic (metal oxides) Accuracy (typical values) 0.1 to 1.0°C 0.5 to 5.0°C 0.1 to 1.5°C Long term Stability Excellent Variable, Prone to ageing Good Temperature range -200 to 650°C -200 to 1750°C -100 to 300°C Thermal response Wirewound – slow Film – faster 1-50 secs typical S ...
Introduction For years I’ve been “helping hand”-less. Since I was a kid, the design of the classic helping hands has not really changed - it has stood the test of time, but just for lightweight tasks. For anything large/heavy, it all goes wrong.   Here’s one attempt at solving the problem.. it relies on cheap camera ball-heads and clamps, and a steel base. It can all be built in an hour or two, depending on how fancy a base is desired. Otherwise, it is all plug-and- ...
Pt100 Sensors for Industrial Use   The use of a platinum resistance thermometer probe in industrial and scientific applications will normally result in good, accurate temperature sensing without the need for special cables (unlike thermocouples). To achieve the best possible accuracy and reliability, care is needed with installation of the probe, connections, and choice of the host instrumentation.   Choice of wire-wound or flat film sensing resistor.   The resistance elemen ...
Now that I have a programmable psu, dc load, oscilloscope and multimeter, it's time to build a flexible test bed. It's main purpose is to specify efficiency of switch mode regulators. But with some tweeking itcan also be used to measure ripple of a power supply under load. It's going to be a flow that can step through voltages, then sweeps the load over a range,makes measurements and log them to a spreadsheet. The flow will be able to loop this process once, or continuous until the STOP bu ...
  Advances in electron microscopy have given a much deeper insight into the nanoscale world. Experiments using electron microscopy only has a small amount of information generated as the beam hits the samples. A team at the Department of Energy's Lawrence Berkeley National Laboratory has invented a electron detector that can capture information at a much faster rate than before. The new device was installed on Feb. 12 at Berkeley Lab's Molecular Foundry, and it captures those images on a su ...

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