First, to all that are celebrating Diwali this week, we hope that you have a fantastic week. As part of this, our author TK Hareendran has put together a post that may help your celebrations. His remote firework fuse is a project that can help add a bit of safety to any fireworks display. It uses a radio transmitter/receiver pair to set off fireworks, firecrackers, or even model rockets.
Next week, Kelcie, will put out the second part to her micro:bit Halloween series. As part of the AspenCore websites, there will be a roundup of all the Halloween projects which will be posted on EEWeb.
Now onto the Weekly Roundup…
I recently came across a post on Twitter from snaptronics showing the use of small metal, dome snap switch covers used as a compression spring for battery contacts. This is a simple use case, but has the potential to shrink current applications that are using standard wire spring contacts. I love the approach. Let us know if you try this. Send us pictures.
A blogger going by the user name of Reviahh has detailed their PICkit 3 mini project. This project was not an attempt to specifically create a micro standalone device, but as a practice run to be able to create projects with embedded debugging capabilities built on board. Unfortunately, shortly after the post went live, the blog site seems to have gone down, but the cached version is still out there (the link takes you to the cached version).
ST Microelectronics has released a new variant of their STSPIN32F0 SiP (System-in-Package) devices for use with two cell lithium battery powered devices. The previous version of the device had a low voltage cutoff at 8V, but the new variant supports down to 6.7V (actually slightly lower when you look at the datasheet). The part comes in a 7mm x 7mm QFN48 package. Included in the device is a programmable Cortex M0 microcontroller with 4kB SRAM and 32kB flash three half-bridge, N-channel gate drivers. The gate drivers can provide up to 600mA of drive current.
Have you ever wondered if it is worth it to use a shielded inductor or not in your design? After all, many cheap power supplies are manufactured with large, unshielded inductors. Steve takes you through a pretty convincing argument on why you should look to use shielded inductors. This post is complete with oscilloscope measurements.
Radar is something that really fascinates me. What used to be accessible to very few is now becoming commonplace. Henrik shows off the latest version of his frequency modulated, continuous wave radar. It can detect a human sized object beyond 100m and show multiple moving targets. It is a really fascinating read. All the boards were manufactured by OSHPark.
I came across this older post from Robert Keim this week and found it rather useful. Both in my professional world and in my hobby projects, I have a need for temperature monitoring. This project uses a few low-cost hardware modules and couples them with Scilab for data logging and analysis. I really love to see embedded projects that interface with the desktop environment. Using Scilab for the bridge, and having full GUI control make this project unique.