Why another spot welder project? Building a spot welder is one of the (arguably few) cases in which you can build something for a fraction of the price of the commercial version with comparable quality. And even if build-before-buy were not a winning strategy, it is a lot of fun! So I decided to embark …
Physicists at the National Institute of Standards and Technology (NIST) and partners have demonstrated an experimental, next-generation atomic clock—ticking at high “optical” frequencies—that is much smaller than usual, made of just three small chips plus supporting electronics and optics. Described in Optica, the chip-scale clock is based on the vibrations, or “ticks,” of rubidium atoms confined in a tiny …
EXPERIMENTAL NEXT-GENERATION CHIP-SCALE ATOMIC CLOCK Continue Reading
It detects stationary and moving people just like a PIR, but it can do that also behind doors and thin walls, by taking advantage of the Doppler effect. The detection of people, animals and hot bodies in general has been done for years using passive infrared radars, also known as PIR, which work by placing …
MICROWAVE PRESENCE DETECTOR WORKS USING DOPPLER EFFECT Continue Reading
One of the essentials on the bench is some form of hot air gun. Whether it’s a precision tool intended for reworking PCBs or the broad-stroke item used for paint stripping, we’ve all got one somewhere. The paint-stripping variety are pretty cheap, but not as cheap as [Porcas Pregos e Parafusos]’s home made hot air gun. …
THIS HOT AIR GUN IS EITHER A WORK OF GENIUS OR LETHAL, WE CAN’T DECIDE Continue Reading
Baking cupcakes is a fun pastime, and one which we imagine many people took up in this year of quarantine and lockdown. However, anything a human can do, a machine can certainly make an attempt at, as [Skyentific] shows with this roboticized cupcake machine. The build will be familiar to anyone who has worked with 3D …
CUPCAKE MACHINE MAKES TASTY, IF WEIRD, CREATIONS Continue Reading
The Socionext MN87900 from Socionext is a powerful and low-power single-chip microwave sensor at 24GHz with sophisticated sensing capabilities like motion detection, speed and direction detection and so many, that can quickly find applications in the Internet of Things sensing applications. Unlike PIR sensors like the popular HR-SR501 that can detect motion to about 3 …
I got a couple of Microsemi’s C900502 10.525 GHz X-band Doppler radar motion sensors a while ago. This batch was made in UK and had “UK patents 2243495 and/or 2253108 apply” printed on the case. I have seen a teardown of an HB100 Doppler radar module before and was wondering if I this one is …
Teardown and experiments with a Doppler microwave transceiver Continue Reading
So, you’re an electronics hobbyist and want a 1GHz* active probe, or a professional and tired of blowing your 2000$+ active probe in sketchy circuits when all you wanted to know are the whereabouts of some RF-signal? Then stay with me!! This Instructable will show you how to build a 1GHz* Fet-based Active Probe, the …
