Did you know you can use your frequency counter to detect gravity? You’ve likely done it before and you didn’t even know it!
Dave demonstrates the phenomenon of 2g-tipover on quartz crystal oscillators in an Agilent 53131A frequency counter.
EEVblog #646 – Gravity Detection Using A Frequency Counter! – [Link]
Touring factories in Shenzhen: Visiting an assembly line, Seeedstudio and a CNC shop
Shenzhen is the geek’s paradise and can be described as an awesome concentration of very different companies, all within an hour cab ride from your hotel. If you ever go there, I highly recommend you to have a look at Ian’s article to get practical informations. Shenzhen is located in the south of China, right next to the border with Hong Kong. I therefore decided to spend my first day in this former British colony to buy myself a nice camera to bring back cool videos of my adventures.
Touring in Shenzhen video series from Limpkin – [Link]
Dave shows some techniques on how to build and mount usable PCB based front panels user interfaces with LCD displays and push buttons and capacitive touch buttons onto small cheap extruded aluminium enclosures.
EEVblog #644 – How To Design Front Panels On Extruded Enclosures – [Link]
Here’s a short interview from RS featuring Raspberry Pi Founder, Eben Upton, discussing the latest Raspberry Pi Model B+, shared by RSWWWChannel:
We caught up with Raspberry Pi founder Eben Upton for an exclusive interview on the differences between Model B and the new Raspberry Pi Model, B+. He talks us through all the changes we can expect to see and highlights the improvements made in the newer Model.
Raspberry Pi Founder, Eben Upton, talks the latest Raspberry Pi Model B+ – [Link]
kurtscottage @ youtube.com writes:
In this video I’m showing you how I built some solar panels from start to finish I tried to make it as detailed as possible. These panels cost me very little to build and are fun projects for everyone. This is just one way of doing this there are lot’s of others doing this and good videos out there. Presently I’m using my panels at a job site where there is no electricity available they are running my RV off the grid. These panels are not encapsulated but they work well and low cost not for on roof installation best to be close to ground for inspection.
Homemade Solar Panels Diy tutorial – [Link]
Scheme-It is an online schematic and diagramming tool that allows anyone to design and share electronic circuit diagrams. Walk through how to create your own diagrams with the electronic symbol library and how to export and share your drawings.
Scheme-It – Online schematic and diagramming tool – [Link]
mjlorton @ youtube.com writes: In this video I go through the components that are part of a solar power solution. I explain the differences between On-grid vs. off grid.
How to Solar Power Your Home / House #1 – On Grid vs Off Grid – [Link]
Dave grabs a few junkbox parts and builds a useful constant current load for switch mode power supply, battery testing, and other applications.
EEVblog #102 – DIY Constant Current Dummy Load for Power Supply and Battery Testing – [Link]
In this episode Shahriar explores the world of filters! Starting from a simple lumped RC filter, he briefly covers the theory before moving onto measurement techniques. The bandwidth of the filter is verified experimentally in the time domain. A more complex RLC band-stop filter is also demonstrated with a tune-able inductor which is measured using an RLC meter. Using a Rigol spectrum analyzer with built in tracking generator and an active probe, the frequency response of the filter is measured. Several other packaged filters are also demonstrated and a microwave band-pass filter is disassembled to reveal its internal construction.
Tutorial on Passive Filters, Data Transmission and Equalization – [Link]
Dave explains, shows, and measures a potentially big trap with using high value ceramic capacitors. Is your 10uF capacitor really 10uF in your circuit? You might be shocked! Those humble X7R caps you think are a “stable” dielectric? think again… Class II and above ceramic capacitors can vary their capacitance drastically with DC bias voltage level and also the applied AC voltage.
EEVblog #626 – Ceramic Capacitor Voltage Dependency – [Link]