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Arduino and Raspberry Pi Pico Projects

Submitted by Roy Schestowitz on Monday 10th of January 2022 10:16:56 PM Filed under
Hardware

  • Low Cost Haptic VR Gloves Work With Hacked Steam Games | Hackaday

    [IraqiGeek aka Lucas VRTech] has made some significant progress with building force-feedback type haptic gloves for use with steam VR games. The idea is pretty straightforward; the end of the finger is attached to a cable, which is pulled from inside a sprung-loaded spool: the kind used for hanging ID cards on.

    The spool body can rotate, but a peg protruding from it engages with the arm of a co-located servo motor. This produces a programmable stop position. But it is a hard stop, and it is not possible with the current hardware to detect precisely when the stop is reached, nor is it possible to control the force it is pushing with. Such features are not difficult to achieve, its just a matter of a little more development with some custom mechatronics.

  • PsyLink is a low-cost, non-invasive EMG interface based on the Nano 33 BLE Sense

    Non-invasive EMG interfaces have the potential to solve many problems that afflict those who suffer from a disability or simply want a more efficient way to perform a task. This is what led one maker, who goes by the name “Hut,” to create their own open source device called PsyLink. It works by measuring the minute electrical impulses that cause muscles to contract and then sending them for further processing and inferencing via a machine learning model. 

    PsyLink’s initial prototype was based around the Nano 33 BLE Sense due to its large number of ADC pins and potential for Bluetooth connectivity. The device features a pair of aluminum foil pads attached to some wires, although this was later changed out for studs embedded within a more secure sleeve. Signals are read from the electrodes and sent through a series of filters made from op-amps and eventually to an analog multiplexer. After that, the signal is digitized by the onboard ADC and transmitted over Bluetooth Low Energy where it is then displayed in a custom desktop application. 

  • '80s-style home computer made from scratch using an Arduino Due | Arduino Blog

    As a continuation from his previous Arduino BASIC interpreter project, Stefan Lenz wanted to take things a step further by recreating a home computer from the 1980s with an Arduino Due board and just a few other components. His system combines a 7″ 800 by 480px TFT screen with an SD card reader acting as the disk, along with a PS/2 port for connecting a keyboard. 

    He began by mounting the TFT display shield to the Arduino by slotting it in place and inserting an SD card to function as the external disk since floppy drives have long since disappeared and would be far too unwieldy. After soldering some additional wires to the SPI and I2C bus pins, a level shifter was attached to two digital pins that serve as the data and clock lines for the external PS/2 port. 

  • Raspberry Pi Pico Gets A Tiny Keyboard On Its Back | Hackaday

    With hackers and makers building custom computing devices that don’t necessarily follow conventional design paradigms, there’s been a growing demand for smaller and smaller keyboards. Many of the cyberdecks we’ve seen over the last couple of years have used so-called 60% or even 40% keyboards, and there’s been a trend towards repurposing BlackBerry keyboards for wearables and other pocket-sized gadgets. But what if you need something even smaller?

    Enter this incredibly diminutive keyboard created by [TEC.IST]. With 59 keys crammed into an area scarcely larger than three US pennies, it may well be the smallest keyboard ever made. The PCB has been designed to mount directly onto the back of a Raspberry Pi Pico, which is running some CircuitPython code to read the switch matrix and act as a standard USB Human Interface Device. The board design files as well as the source code for the Pico have been released on the project’s Hackaday.io page, giving you everything you need to spin up your own teeny tiny input device.

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