Laptop Keyboard Conversion to USB

From Frank Adams on Hackster.io:

t61_lc_and_3p2_with_text_lUI96aIUSs.jpegLaptop Keyboard Conversion to USB

I made a “nearly universal” USB controller using a Teensy LC or 3.2 on an FPC connector board that will work with most laptop keyboards.

I did this project because I’ve seen many forum posts from people asking how to use the keyboard from their old broken laptop. Unfortunately the answers given are “it can’t be done,” “it’s too hard,” or “rip apart another USB keyboard and steal the controller circuit.” I believe I have a better answer by using a “nearly universal” keyboard controller based on a Teensy LC or 3.2 mounted on an FPC connector board. This board accepts keyboard cables with up to 34 pins on a 1 mm or 0.8 mm pitch. The board shown below won’t work on every keyboard but it will work on most.

 

Laptop Keyboard Conversion to USB

Keep Both Hands on the Probes With This Oscilloscope Footswitch

We’ve got two hands, so it’s natural to want to use both of them while diagnosing a circuit with an oscilloscope. Trouble is, keeping both hands on the probes makes it a touch difficult to manipulate the scope. If only there were some way to put your idle lower appendages to work.

This multipurpose oscilloscope footswitch interface makes so much sense that we wonder why such a thing isn’t standard equipment on more scopes. [Paul Roukema]’s interface relies on the USB Test and Measurement Class (USBTMC) protocol that allows most modern scopes to be remotely controlled, somewhat like the General Purpose Interface Bus (GPIB) protocol of old. [Paul]’s interface uses an STM32 microcontroller to talk USBTMC to either Keysight’s Infinium scopes or the Tektronix DPO line, since those were what he had to test against. Tapping the footswitch cycles the acquisition mode on and off or triggers a single acquisition. He’s thoughtfully included the USBTMC specs in his GitHub project, so adapting it to other scopes should be straightforward. We’d even wager that older scopes with GPIB could enjoy the same handsfree control.

via Keep Both Hands on the Probes With This Oscilloscope Footswitch

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BadgeLove contest on Hackster.io

We are excited to announce this new contest with Hackster.io and Autodesk:

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BadgeLove!

BadgeLove by Hackster: The Blinkiest Badge Challenge on Earth! 

Win up to $5,000+ in prizes!

#BadgeLife is the new electronic graffiti. This form of art is in a league of its own, first popularized by DEFCON hackers, now boasts serious technical sophistication, a wicked artistic flair, peppered with political, cryptography, social, cultural and comical narratives, flashing LEDs and screens with add-ons galore.

You are invited to join our first, and certainly not last, BadgeLove challenge, sponsored by OSH ParkAutodesk EAGLE & Fusion 360, and Hackster.

Share your unique design with 700,000+ Hacksters and we will reward badge fanatics for their beautiful, weird, cool contributions.

BadgeLove contest on Hackster.io

Building Portable Linux Devices: Never Been Easier, But Still Hard — Hackaday

We live in a Golden Age of single-board computers. There was a time when a portable computer that was any good was a relatively rare and expensive device, certainly not something you could expect to replicate for yourself. A Psion, or later a Palm or perhaps a WinCE device would have been a lot more…

via Building Portable Linux Devices: Never Been Easier, But Still Hard — Hackaday

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Digital video for FGPAs over PM

From Kevin Hubbard of Black Mesa Labs:

img_2528.jpg

BML DVI DIGITAL VIDEO FOR FPGAS OVER PMOD

2018.11.18 : Update – new board added. Does full 24bit color video using DDR instead of SDR.  Board fab may be purchased from OSH-Park here.

bml_24v_ddr_dvi_video.PNG

2017.12.15 :  Black Mesa Labs is proud to present two open-source-hardware DVI  video boards for adding TMDS digital video to FPGA platforms with standard PMOD connectors.  These two boards are currently available to purchase as bare fabs directly from OSH-Park, or Gerbers and design files may be downloaded from BML here.

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BML 3bit DVI over single-PMOD:

bml_3b_hdmi_top_and_bottom.PNG

The BML 3bit DVI over single-PMOD uses 7 of 8 available LVCMOS 3.3 pins on a single PMOD to provide 3bit color ( R,G,B 100% On or Off ). Example Verilog design drives 800×600 using a 40 MHz dot clock. The TI TFP410 is very versatile in the resolutions it can generate and is really just limited by the clock that the FPGA can provide and the data rates the PMOD connectors are capable of. The bare 2-layer fab may be purchased from OSH-Park directly for $5 USD ( for 3 boards ) from this link. The TFP410 is about $8 USD. The IC and this HDMI Connector is pretty much the BOM, so the entire cost to assemble is less than $20 USD. The rest of the BOM is Qty-2 0603 0.1uF Caps ( 25V 20% X7Rs were used ), Qty-1 0603 10uF Cap, Qty-1 0805 500ohm 1% resistor and an optional 0805 Ferrite Bead ( 240-2390-1-ND was used, but may be replaced with a wire ).  If you don’t want to power the TFP410 from your FPGA’s 3V rail, the Ferrite Bead may be removed and a BU33 ( or equivalent 5SSOP) 3.3V LDO regulator and 10uF cap may be stuffed and the board may be powered by a 5V input via.

The 3bit color Test Pattern from the board driven by FPGA sample design looks like this:IMG_2530.JPG

Note that blue exists, it is just off screen.  With 3bits of color you get 8 colors by additive color mixing  for Black, White, Red, Green, Blue,  Yellow, Cyan, Magenta.

Below is a picture of the 3b board plugged into a Lattice ICE40 icoBoard which is available from Trenz here.  The smaller iceZero board (PiZero dimensions), also a Lattice ICE40 is a joint BML and Trenz design and would also be a good platform for DVI video and is available here.

IMG_2539.JPG

Design files for the board, including Gerbers, BOM and text netlist description may be downloaded from my public Dropbox here.

Digital video for FGPAs over PM