Great Scott Gadgets HackRF an open source SDR platform HackRF One is available from: HackRF One from Great Scott Gadgets is a Software Defined Radio peripheral capable of transmission or reception of radio signals from 1 MHz to 6 GHz. Designed to enable test and development of modern and next generation radio technologies, HackRF One is an open source hardware platform that can be used as a USB peripheral or programmed for stand-alone operation. 1 MHz to 6 GHz operating frequencyhalf-duplex transceiverup to 20 million samples per second8-bit quadrature samples (8-bit I and 8-bit Q)compatible with GNU Radio, SDR#, and moresoftware-configurable RX and TX gain and baseband filtersoftware-controlled antenna port power (50 mA at 3.3 V)SMA female antenna connectorSMA female clock input and output for synchronizationconvenient buttons for programminginternal pin headers for expansionHi-Speed USB 2.0USB-poweredopen source hardware HackRF One has an injection molded plastic enclosure and ships with a micro USB cable.
Supercapacitor Digital Calipers I got some supercapacitors from Katie, and my first project was to replace the battery in my digital calipers with a capacitor. Digital calipers are great, exept for when the batteries are dead. Who has those tiny watch batteries laying around anyways? The calipers fully charge in approximately 20 seconds, and they last for a few days of moderate use after a single charge. cover removed showing wiring the charging port and switch finished calipers with cover removed finished calipers The capacitor is rated to a voltage of 2.5 V, but USB supplies 5 V. usb charger detail of charging circuit Osmond PCB Home PCB Dear Customers, We are sorry to inform you that the PCB prototype service is temporary suspended due to the lack of free capacity. As you know we had long vacation in August and people was keep sending PCB prototypes even while we were on vacation, this created so huge backlog that we couldn't repond to all PCB jobs for more than a week after we resumed work. On top of this our lines usually are loaded close to 100% with the production of our own development boards and having such additional big load start to mess with our production schedules and delay our development boards production and shipments which is unacceptable. We are sorry for this situation and we expect this to improve in the next months, so we can re-enable this service at fist possibility, but effectively from September 17th the PCB prototype service is suspended. We do offer people to put many boards on same panel, and we did offer panelization service free of charge. 1. 2. Why?
Digits Digits is a wrist-worn sensor that recovers the full 3D pose of the user's hand. This enables a variety of freehand interactions on the move. The system targets mobile settings, and is specifically designed to be low-power and easily reproducible using only off-the-shelf hardware. The electronics are self-contained on the user's wrist, but optically image the entirety of the user's hand.
PCB CNC aus Metalab, dem offenen Zentrum für meta-disziplinäre Magier und technisch-kreative Enthusiasten. Introduction CNCs can facilitate in the creation of PCBS: Manual etching and then using CNC to drill automatically. Cutting out the board , to have round PCBs, or similar. Automated isolation routing: From a PCB some surface parts are milled away, so that the connection copper area are left isolated. Currently, all three steps are working on the Geilomat. For the isolation, there is the normal approach, where all contours of copper areas are milled. Some results are given in the soup of the Geilomat 0805 SMD resistors work fine, although the solder locations are not visible any more. Examples A normal isolated result. A voronoi milled PCB (left), a normally milled PCB, and a traditional PCB. Time Consumption For a complete, dense EuroPCB, expect about one hour of total time: For an arduino shield, expect about 30 minutes: Pros/Cons Pros: Cons: It calls a couple of external programs: Usage Hints Links
Better PCBs in Eagle Skill Level: Intermediate by Nate | November 06, 2008 | 42 comments Designing a Better PCB: We are constantly pushing ourselves for better printed circuit boards (PCB). We’ve messed up piles of PCBs over the years. Important Files: SparkFun Eagle Rules for designing PCBs in Eagle. Trace Width and Spacing: Just because a fab house can handle down to 5mil traces and 6mil space doesn’t mean you should design with those sizes. PIC32 development board Even complex boards with tight pitch packages and a horrible rat’s nest of traces can be routed with 10mil traces and 8mil spacing. Isolate: A ground (or power) plane is a good idea on some projects. What the?! A simple board with 10mil isolation We recommend you increase the default 10mil isolation in Eagle of a polygon pour to ‘0.012’ or 12mil. Increased isolation good, ground plane break may be bad. To increase the isolation on an existing polygon, click on the ‘i’ button for information, then click on the border of the polygon. many people to fail.
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