Skip navigation
1 2 3 Previous

Test & Tools

309 posts
Audi’s 25th Hour Flow Research shows more smart cars on the road will decrease traffic, but it won’t be enough to solve the issue of congested roads. A look at how smart cars can improve traffic flow. (Photo via Audi)   At the end of a long day, you’re ready to go home and binge watch some shows on Netflix, work on your classic car, stare at a wall, do whatever blows your hair back. But before that, you have to deal with rush hour traffic. It’s a nightmare. Congeste ...
Part of Google’s guide to bringing native hearing aid support to Android (Photo via Google)   According to the World Health Organization, roughly 466 million people suffering from hearing loss. That number is expected to grow to 900 million by 2050. With this in mind, many companies are stepping up and providing aids to help those afflicted. For instance, there are Bluetooth hearing aids compatible with iPhones, but this leaves Android users in the dust. Google is hoping to fix this ...
Those who rejected Google Glass as a useful device could be regretting it, as Glass could be helping in the treatment of autism in children. View of a patient’s information displayed on Glass’s screen. (Image via Nature)   Glass is a device that Google launched mid-2012 with the vision of liberating smartphone users from the urge of checking their phones. It didn’t work. For those who do not know, Glass is a type of accessory which looks like a combination of eyeglasses a ...
The team of researchers is looking to make MRIs up to 10 times faster. Increased scan times may take some of the dread out of MRIs. (Photo via Getty Images)   MRIs are important procedures used to detect brain tumors, brain injuries, infection, and dementia just to name a few conditions. But it’s a long, drawn-out process, not to mention stressful. And if you’re claustrophobic, the thought of going into that narrow tube is terrifying. This is why scientists with the Facebook Ar ...
Introduction This short blog post discusses an attempt to make test leads for hopefully better measurements!   Measuring small resistances is really difficult with the usual 2-wire measurement with multimeters. The multimeter will measure the resistance of the leads as well as the resistance-under-test. Although this could in theory be nulled out, the result can still be poor because the connection still depends on the variable resistance between the probes and the device, i.e. contact ...
In 2015, researchers set out to track bees to understand the reasons behind the slow decline in bee population. Honeybee carrying a tracking device (Image from RBG/KEW)   According to Darwin’s theory of evolution, the species that survive are the ones that adapt and change based on their environment. It seems to be a very simple and clear shot on the journey of survival, and on the surface, it probably makes a lot of sense. Maybe that is the reason mankind appears to be at the top of ...
jc2048

Programmable Load Build

Posted by jc2048 Aug 31, 2018
Introduction   This blog is to document my attempt to build Jan and Peter's load. I'm trying to catch up with Jan, who is currently way ahead of me, so I can start doing measurements.   Although I normally prepare blogs in full before posting them, this time, as an experiment, I'm going to do it differently and blog as I go along, with the blog gradually accumulating (accreting?) over time. It will be a bit rough-and-ready and unpolished, but perhaps give a better flavour of the p ...
i want to look at retro games as well as raspberry pi singles. I have no clue what frequency to buy. ...
Introduction This blog continues my series of comparing some insulation testers to the Keysight  U1461A that I have had issues with and the Megger  MIT420/2 that I carried a road test review out on for element 14 last year   Keysight U1461A meter fault blog   Megger Insulation Tester - Review   Chauvin Arnoux CA6526 Review   The next insulation tester on my list is from Flir. The IM75 is their only insulation tester, that they also classify as a multi-meter. I ...
Introduction One really useful use-case for a VNA is to characterise antennas. When radio transmitters operate, the signal travels with virtually no loss over a cable (often a coax cable) and then is radiated by an antenna. But some of the energy may be reflected back towards the transmitter, if there is an imperfect match. The VNA operates in a manner where it can simulate a transmitter, and observe how much of the signal is reflected back. This provides an indication of how well the antenna is ...
Peter, Jon and I are building a Programmable Electronic Load. In this post I use LabVIEW to automate the measurements on the load itself. I'm buitlding an automated test setup to characterise its behaviour The process tests the load for a range of voltages and currents, and measures some points of interest. The results are logged to a spreadsheet.   Characterising an instrument requires lots of measurements. You put it in many conditions and then measure the behaviour. This exercise ...
Peter, Jon and I are building a Programmable Electronic Load. In this series of blogs I'm building a LabVIEW library of reusable components   In this seventh article I introduce the first advanced block: Raw ADC control.   LabVIEW has a set of blocks to build flows with serial communication devices. Those blocks work well with our instrument. However, inspired by what many instruments do (in this case, the BK Precision 85xx series), I'm creating more abstract blocks.   This ...
Peter, Jon and I are building a Programmable Electronic Load. In this series of blogs I'm building a LabVIEW library of reusable components   In this sixth article I introduce the first advanced block: Raw DAC control.   LabVIEW has a set of blocks to build flows with serial communication devices. Those blocks work well with our instrument. However, inspired by what many instruments do (in this case, the BK Precision 85xx series), I'm creating more abstract blocks.   This b ...
I'm building a SCPI electronics lab instrument for Linux. This post connects the C SCPI parser service together with the C++ Instrument service. I've split up the SCPI interpreter and the instrument control for my own learning. I'm trying to use daemons on a linux SOB that talk together. I could have used named pipes, messages or file structures to let them interact but I've used sockets. Critique in the comments please.   What Came Before and Linking Things Together  In the pr ...
A new research could enable amputees who use a prosthesis to experience pain again. A special skin-like material has the ability to transmit pain to the brain. Pieces of the synthetic skin on the mechanical hand’s thumb and index finger. (Image via John Hopkins School of Medicine)   Several situations can affect someone’s health and wellbeing, but some of those circumstances can bring the person to lose a limb or two or just part of a limb. When that happens, in many cases, a p ...

Filter Blog

By date: By tag: