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via Join Hackaday And Tindie At The Southern California Linux Expo — Hackaday
Eric Brombaugh designed this breakout board for the Rafael Microelectronics R820T2 Advanced Digital TV Silicon Tuner chip:
This is the same chip used in most all of the RTL-SDR dongles, as well as the Airspy and numerous other radios. The chip is a versatile front-end with reasonable sensitivity and wide tuning range.
The design presented here is almost an exact implementation of the Mfg’s suggested demo design from the datasheet, implemented on the OSHpark 4-layer PCB process and provides a simple 4-pin interface with power, ground and I2C bus for controlling the tuner. A broad-band RF input and 10MHz IF output are provided on SMA connectors.
The breakout PCB design and STM32F0 firmware for the Rafael R820T2 tuner chip are shared on GitHub:
emeb has shared project on OSH Park:
The chat functionality on Hackaday.io is quickly turning into the nexus of all things awesome. This Tuesday, February 28th, everyone’s favorite robotic dog is talking certifications. Everything from FCC to UL to OSH to CE and the other CE is on the table. If you want to build hardware, and especially if you want to…
via Tindie Chat: All About Certifications — Hackaday
From the Pluxx’s Magitech Golem Parts Emporium blog:
This is a breakout board for the Intersil ISL12022M real-time clock, with optional I²C pull-ups and a CR1225 backup battery. The circuit is based on the design recommended by Intersil, with a few tweaks. It’s the second board I’ve designed so far.
golemparts has shared the project on OSH Park:
Brian Solon designed this compact board to add an Adafruit 2.2″ TFT LCD display to the Raspberry Pi Zero:
The design files are available on GitHub:
Elliot Williams writes on Hackaday:
[Max K] has been testing the battery life of his self-designed watch under real-world conditions. Six months later, the nominally 3 V, 160 mAh CR2025 cell is reading 2.85 V, so the end is near, but that’s quite a feat for a home-engineered smart watch
chmod775 designed this compact, standalone board to be programmed with a simple visual language:
Focus born with the purpose of making a prototype board that simplify every aspect of programming.
Spent the last hour writing down the main concept of the Visual Programming Language for the Focus! It’s just a simple sketch, but I wanted to share it with you the main reason why I’m building it.
From the Intelligent Toasters blog:
I’ve been working on, replacing the NAND raw flash with an eMMC chip on the CPC2.0 board.
I wrote about raw flash and the challenges of writing a flash translation later in part 16 of this series. After some research, I concluded that the eMMC interface looked exactly like the much more common SDCard interface, albeit that the interface can be run with an 8-bit width. SDCards are limited to 4 bits by the physical pin count. Taking a gamble I created a board to test this new eMMC chip. I created a fake SDCard!
This fake card allowed me to check very quickly if my assumptions were correct both at a hardware and a firmware level. I wanted to be sure that it was possible to interface the eMMC via 4 bits, rather than the full 8 bits and be sure the firmware instructions were the same between these two technologies.
Intelligent-Toasters has shared the board on OSH Park:
Clovis Fritzen designed this Arduino-compatible, vertically-mountable board that exclusively uses through-hole components:
I personally love the concept of electronic boards connected in “slots” (vertically attached to a horizontal board), like most industrial-grade PLC’s or even our desktop’s expansion cards (video, sound memory): it saves a lot of space and adds more functions to the system, all at once!
The PCB is for sale on Tindie:
Vertically mountable Arduino – PCB only
This is an Arduno-Nano compatible controller that can be vertically mounted to bredboards and boards