raspberry pi

3D Scanner HAT for Raspberry Pi

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From Jonathan Cohen on Tindie:
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3D Scanner HAT for Raspberry Pi

3D Scanner HAT expansion board interface for Raspberry Pi running FreeLSS on the PICLOP ATLAS FreeLSS

 

https://www.tindie.com/products/electronlove/3d-scanner-hat-for-raspberry-pi/
https://www.tindie.com/products/electronlove/3d-scanner-hat-for-raspberry-pi/

I wanted to make a custom interface for use with the open-source 3D Scanning software, FreeLSS. I was very impressed with the Arduino-based Ciclop scanner and the Raspberry Pi-based Atlas Scanner. Several FreeLSS users merged the two scanner platforms, creating the PiCLOP 3D Scanner. However, there were few changes to the basic PCB design used for the scanner. I wanted to integrate the hardware functionality into a Raspberry Pi HAT format, with the inclusion of extra features for expandability — and who knows, other uses !

 

https://www.tindie.com/products/electronlove/3d-scanner-hat-for-raspberry-pi/
https://www.tindie.com/products/electronlove/3d-scanner-hat-for-raspberry-pi/

What makes it special?

  • Conforms to the Pi Foundation specification for HATs !
  • 5V power design (only a single voltage) allowing for Pololu low-voltage stepper driver carrier.
  • Connections for up to two independent soft-PWM controlled LED light sources.
  • I2C interface for OLED displays and light intensity sensors, e.g. TSL2561 or TSL2591.
  • Serial communication breakout for console support.
  • Additional GPIO signal breakouts for other sensors and devices.
  • User-programmable EEPROM ! for auto-configuration and device overlays.
  • Standard DC power connector for up to 5V 4A power supply and connections for power switch.
  • Over-current protection by poly re-settable fuse.
3D Scanner HAT for Raspberry Pi

Raspberry Pi Soft Power Controller

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James Lewis designed this AVR based power controller for the Raspberry Pi that can safely shutdown the Pi:

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Raspberry Pi Soft Power Controller

The total circuit includes an AVR microcontroller, a near-zero current LDO, and a switching (buck) supply. My current design draws about 350nA when Vin is 9V. The AVR controls power to the Raspberry Pi. Two GPIO pins are used. One for the AVR to initiate a shutdown and one for Raspberry Pi to tell AVR after filesystem has been unmounted.
The design files and source are shared on GitHub:

baldengineer/Raspberry-Pi-Soft-Power-Controller

Raspberry Pi Soft Power Controller

Pi0CKET-tiny

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From moosepr on Hackaday.io:

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Pi0CKET-tiny

Possibly the worlds smallest Pi based gaming device!

 

https://hackaday.io/project/21553-pi0cket-tiny
https://hackaday.io/project/21553-pi0cket-tiny

Our 0.8mm thickness 2 layer service was used to make it as slim as possible:

 

https://hackaday.io/project/21553-pi0cket-tiny
https://hackaday.io/project/21553-pi0cket-tiny

The designs for a 3-D printed case are shared on the Hackaday.io project page:

 

https://hackaday.io/project/21553-pi0cket-tiny
https://hackaday.io/project/21553-pi0cket-tiny

 

Pi0CKET-tiny

Ultrasound Imaging with Raspberry Pi

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 writes on the Hackaday blog:20170529_203924_notes

Best Product Entry: A HSDK for Ultrasound Imaging

As an entry into this year’s Best Product portion of the Hackaday Prize, [kelu124] is developing a hardware and software development kit for ultrasound imaging.

Ultrasound is one of the primary tools used in modern diagnostic medicine. Head to the doctor with abdominal pain, and you can bet you’ll be seeing the business end of an ultrasound system. While Ultrasound systems have gotten cheaper, they aren’t something everyone has in the home yet.

AD9200

[kelu124] is working to change that by building a hardware and software development kit which can be used to explore ultrasound systems. This isn’t [kleu124’s] first rodeo. HSDK builds upon and simplifies Murgen, his first open source ultrasound, and an entry in the 2016 Hackaday prize. [kelu124’s] goal is to “simplify everything, making it more robust and more user-friendly”.

setup.png

The system is driven by a Raspberry Pi Zero W. A custom carrier board connects the Pi to the pulser block, which sends out the ultrasonic pings, and the analog front end, which receives the reflected signals. The receiver is called Goblin, and is a custom PCB designed [kelu124] designed himself. It uses a variable gain amplifier to bring reflected ultrasound signals up out of the noise.

 

Ultrasound Imaging with Raspberry Pi

“Ye Olde Nowt” Raspberry Pi Game Console

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From Radomir Dopieralski on Hackaday.io:

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Ye Olde Nowt

Yet another pi zero retro handheld game console.

https://hackaday.io/project/25256-ye-olde-nowt
https://hackaday.io/project/25256-ye-olde-nowt
https://hackaday.io/project/25256-ye-olde-nowt
Quantity Component name
1 Raspberry Pi Zero
1 1.5″ SSD1351 Display Module
2 Small SMD Speakers
2 33nF SMD Capacitor
2 1µF SMD Capacitor
2 150kΩ SMD Resistor
2 270kΩ SMD Resistor
6 Buttons
6 90° Buttons
1 ZeroLiPO
1 1S LiPo Battery

8650341498134170367

“Ye Olde Nowt” Raspberry Pi Game Console

Multifunction Raspberry Pi Chiptune Player

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General Instrument’s AY-3-8910 is a chip associated with video game music and is became popular with arcade games and pinball machines. The chip tunes produced by this IC are iconic and are reminiscent of a great era for electronics. [Deater] has done an amazing job at creating a harmony between the old and new with his Raspberry…

via Multifunction Raspberry Pi Chiptune Player — Hackaday

Multifunction Raspberry Pi Chiptune Player

Design a Raspberry Pi add-on board with KiCad

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Learn how to design a simple add-on board for Raspberry Pi with KiCad in 20 minutes with this new tutorial from Chris Gammell of Contextual Electronics:

Screenshot from 2017-06-05 00-24-15.png

Shine On You Crazy KiCad

This course shows how to make a custom but very simple piece of electronics for the Raspberry Pi platform. The primary purpose is to get users building something in KiCad as fast as possible.

The free course contains four videos:

Designing a PCB in KiCad in 20 minutes

Buying Components

Assembling a simple circuit board with SMD components

Writing code, blinking an LED with a Raspberry Pi

ChrisGammell has shared the board on OSH Park:

Shine

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Order from OSH Park

Design a Raspberry Pi add-on board with KiCad

LiFePO4wered/Pi+

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Patrick Van Oosterwijck created this board to power the Raspberry Pi with a LiFePO4  battery:

8299171495235174731.jpg

LiFePO4wered/Pi+

Many IoT and other projects are based on the Raspberry Pi, but usually little thought is given to the power supply. Most project use generic cell phone adapters or USB power banks, which is fine for one-off projects where the duct taped parts and cabling don’t matter and it’s expected that SD cards will die because power was removed with the Pi running.

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But when you need reliable non-stop operation for your prototypes, or you’re ready to turn your project into a good looking product, or you want to use different power sources such as solar, it’s time to look for a serious power manager for your Pi.

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Built on the solid foundation of the #LiFePO4wered/Pi, this project provides Pi bootup and shutdown management based on button or touch, input voltage, battery voltage and time, all while making sure the Pi always performs a clean shutdown before power is removed.

LiFePO4wered/Pi+