The DSLogic open source logic analyzer is on its second release (the plus version) and [OpenTechLab] has a comprehensive review of the new model, which, unlike the original model, includes a different method of connecting probes and provides a separate ground for each input pin.
The device is pretty simple inside with an FPGA, a RAM, and a USB microcontroller. There’s also a configuration EEPROM and a switching power supply. The device stores up to 256 megabits internally and can sample 400 million samples per second on 4 of its 16 channels. [OpenTechLab] even puts the board under a microscope and maps out the input circuit.
There are no shortage of fantastic and creative Power Racing Series cars, but here’s an especially fun example. [Pete Prodoehl] of Milwaukee Makerspace and his teammates [Kathy Cannistra] and [Kyle White] built a Power Racing car based on the design of the iconic Oscar Mayer Wienermobile.
They created the wienie and bun out of fiberglass and foam. Meanwhile, with the KC Maker Faire approaching, the team scrambled to finish the project, with [Kyle] working on assembly while [Pete] tackled the electronics. [Kyle] also proved to be the best wiener rider, with everyone else getting thrown off.
It should be noted that Milwaukee Makerspace got a Moxie bump because a wienermobile is on the PPPRS’s “hit list” of desirable designs. Anyone being the first to create a Top Gun F14, a Mystery Machine, or a non-DeLorean car from Back to the Future gets extra points.
When it comes to bringing an idea to life it’s best to have both a sense of purpose, and an eagerness to apply whatever is on hand in order to get results. YouTube’s favorite Ukrainians [KREOSAN] are chock full of both in their journey to create this incredible DIY e-bike using an angle grinder with a friction interface to the rear wheel, and a horrifying battery pack made of cells salvaged from what the subtitles describe as “defective smartphone charging cases”.
What’s great to see is the methodical approach taken to creating the bike. [KREOSAN] began with an experiment consisting of putting a shaft on the angle grinder and seeing whether a friction interface between that shaft and the tire could be used to move the rear wheel effectively. After tweaking the size of the shaft, a metal clamp was fashioned to attach the grinder to the bike. The first test run simply involved a long extension cord. From there, they go on to solve small problems encountered along the way and end up with a simple clutch system and speed control.
The end result appears to work very well, but the best part is the pure joy (and sometimes concern) evident in the face of the test driver as he reaches high speeds on a homemade bike with a camera taped to his chest. Video is embedded below.
There was a third-party multiplayer upgrade pack for one of the Quake games back in the ’90s that included a whole slew of non-standard weapons. Among them one of the most memorable was a gravity well, that when thrown into the middle of a crowded room full of warring players would suck them into a vortex. Assuming its user had made it to safety in time, they would then be left the victor. The hyper-violent make-believe world of a first-person shooter is probably best left in a Pentium server from the ’90s, with few direct parallels in the real world. Maybe laser tag, or Nerf battles, are the closest you’ll get.
If you are a Nerf enthusiast, then you’ll appreciate [Giaco Whatever]’s CO2-powered remote-control Nerf bomb as an analogue of that Quake gravity well. It fires twelve darts at the press of a button on an infra-red remote control. The firing tubes sit in a nicely machined manifold connected via a solenoid valve to a little CO2 gas bottle. In the hectic world of a Nerf war it is slid out into the field of combat, its operator takes cover, and the other participants are showered in foam darts. There are probably kids who would sell their grandparents to own this device.
The build is detailed in the video below the break, along with a wonderfully tongue-in-cheek movie segment demonstrating it in action.
If you’re a first responder — say, searching for someone lost in the outback, or underneath an avalanche — and you’re looking for someone with a radio beacon, what’s the fastest way to find that beacon? Getting up high would be a good idea, and if you’re using radio direction finding, you’ll want to be able to cover a lot of ground quickly if only to make the triangulation a bit easier. High and fast — sounds like the perfect opportunity for a drone, right?
[Phil Handley]’s Bloodhound project is an autonomous drone that can scan a wide area, listening for emergency beacons while alerting the search and rescue personnel. His test bed tricopter uses DT750 brushless outrunners controlled by 18A Turnigy Plush ESCs and powered by a 2200mAh LiPo. A metal-gear servo works the yaw mechanism. He’s also got a Pixhawk Autopilot, a ArduPilot flight controller, a NavSpark GPS, a software defined radio dongle, and a Raspberry Pi. He made the air frame out of wooden dowels, following RCExplorer’s tricopter design.
The next challenge involves radio direction finding, essentially creating Bloodhound’s foxhunting skills. It needs to be able to autonomously track down a signal by taking readings from multiple angles. In addition to finding lost skiers, [Phil] also envisioned Bloodhound being used to track other beacons, of course—such as wildlife transponders or errant amateur rockets.
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Location, location, location — what’s critical to real estate is also critical to eclipse watching, and without sounding too boastful, those of us atop South Menan Butte, an extinct volcano in southeast Idaho, absolutely nailed it. Not only did we have perfect weather, we had an excellent camping experience, great food, a magnificent natural setting, and a perch 800 feet above a vast plain stretching endlessly to the east and west. Everything was set up for a perfect eclipse experience, and we were not disappointed.