Hackaday Prize 2022: MasterPi Is A Capable Robot With Fancy Wheels

July 1, 2022 by Lewin Day 2 Comments

When it comes to building a mobile robot, often maneuverability is more important than outright speed. The MasterPi robot demonstrates this well, using fancy wheels to help it slide and skate in any direction needed.

Four DC gear-motors are fitted to a metal chassis, each one driving a mecanum wheel. These are special wheels with rollers fitted around their circumference at an angle that allows the robot to move in all directions and rotate in various ways depending on how each wheel is driven.

On top of this highly maneuverable chassis is placed a 5-degree-of-freedom robotic arm. The robot also gets a ultrasonic sensor for avoiding objects, as well as a camera for line-following duties. The camera also allows the robot to pick up blocks and identify their color, and it can then sort them into boxes. It’s all powered by a Raspberry Pi, running a bunch of Python code to make everything happen.

It’s a neat project that shows off just how capable a robot can be with some smart design choices and modern computing hardware on board. We’ve seen some other smart block sorters before, too. Continue reading “Hackaday Prize 2022: MasterPi Is A Capable Robot With Fancy Wheels” →

PlayStation 2 Gets A Seamless Media Center Makeover

July 1, 2022 by Lewin Day 13 Comments

We often see Raspberry Pi boards of various flavors stuck inside vintage computers and the like. [El Gato Guiri] has instead installed one inside a PlayStation 2 Slim, and rather artfully at that. The result is a tidy little media center device.

Pretty tidy, right? All those ports work! Okay, not the memory card slots. But everything else!

The PlayStation 2 was gutted, with a Raspberry Pi 3B installed inside. The original ports on the back, including the USB and Ethernet port, were then wired up to the Pi to make them fully functional. A slot was then cut into the back to allow the HDMI port to be hooked up. The front USB ports work, too, and the optical drive was removed to make way for a 2 TB Toshiba external drive. Adapters are used to make the controller ports work, as well. Finally, a Noctua fan was installed atop the Pi to make sure it never gets too hot.

Whether it’s for watching movies or playing emulated games with the PS2 controllers, the little media center build is sure to do well.

We’ve seen Raspberry Pis stuck in everything from laptops to monitors, as well as plenty of retro hardware too. When a piece of hardware is dead and gone, a Raspberry Pi can be a great way to breathe new life into an attractive old case!

Raspberry Pi Pico W Adds Wireless

June 30, 2022 by Elliot Williams 63 Comments

News just in from the folks at Raspberry Pi: the newest version of their Pico has WiFi and is called, obviously, the Pico W. We were going to get our hands on a sample unit and kick its tires, but it’s stuck in customs. Boo! So until it shows up, here’s what we can glean from the press releases and documentation.

The Pico is, of course, the Raspberry Pi microcontroller dev board based on their RP2040 microcontroller. This in turn has two Cortex M0+ cores and a good chunk of onboard RAM, which has made it a popular target for MicroPython. They had some extra real estate on the PCB, so they’ve added an Infineon CYW43439 WiFi chip, and voila: Pico W.

As of now, the WiFi is supported in both the C SDK and the pre-baked MicroPython image. It looks trivially easy to get it working, and it’s based on the time-tested lwIP stack, a classic in the embedded world. The CYW43439 is also Bluetooth capable, but there’s no firmware support for that yet, but we wouldn’t be surprised if it showed up soon.

The price? $6 for the whole shooting match. You can view this two ways: a small $2 premium over the old Pico, or a price increase of 50%. How you see things probably depends on your order quantity. Either way, it’s firmly in the ESP32 module price range, so you’ve got some comparison shopping to do if your project needs a microcontroller and WiFi. And in these days of silicon shortages, it’s nice to have a couple of options.

Raspberry Pi Simulates The Real Analog TV Experience

June 20, 2022 by Dan Maloney 18 Comments

If you’ve laid hands on a retro analog TV, have the restoration bug, and you plan to make the final project at least somewhat period-correct, you face a bit of a conundrum: what are you going to watch? Sure, you can serve up just about any content digitally these days, but some programs just don’t feel right on an old TV. And even if you do get suitably retro programming, streaming isn’t quite the same as the experience of tuning your way through the somewhat meager selections as we did back in the analog days.

But don’t worry — this Raspberry Pi TV simulator can make your streaming experience just like the analog TV experience of yore. It comes to us from [Rodrigo], who found a slightly abused 5″ black-and-white portable TV that was just right for the modification. The battery compartment underneath the set made the perfect place to mount a Pi, which takes care of streaming a variety of old movies and shorts. The position of the original tuning potentiometer is read by an Arduino, which tells the Pi which “channel” you’re currently tuned to.

Composite video is fed from the Pi’s output right into the TV’s video input, and the image quality is just about what you’d expect. But for our money, the thing that really sells this is the use of a relay to switch the TV’s tuner back into the circuit for a short bit between channel changes. This gives a realistic burst of static and snow, just like we endured in the old days. Hats off to [Rodrigo] for capturing everything that was awful about TV back in the day — Mesa of Lost Women, indeed! — but still managing to make it look good.

Continue reading “Raspberry Pi Simulates The Real Analog TV Experience” →

Turing Pi 2: The Low Power Cluster

June 16, 2022 by Jonathan Bennett 39 Comments

We’re not in the habit of recommending Kickstarter projects here at Hackaday, but when prototype hardware shows up on our desk, we just can’t help but play with it and write it up for the readers. And that is exactly where we find ourselves with the Turing Pi 2. You may be familiar with the original Turing Pi, the carrier board that runs seven Raspberry Pi Compute boards at once. That one supports the Compute versions 1 and 3, but a new design was clearly needed for the Compute Module 4. Not content with just supporting the CM4, the developers at Turing Machines have designed a 4-slot carrier board based on the NVIDIA Jetson pinout. The entire line of Jetson devices are supported, and a simple adapter makes the CM4 work. There’s even a brand new module planned around the RK3588, which should be quite impressive.

One of the design decisions of the TP2 is to use the mini-ITX form-factor and 24-pin ATX power connection, giving us the option to install the TP2 in a small computer case. There’s even a custom rack-mountable case being planned by the folks over at My Electronics. So if you want 4 or 8 Raspberry Pis in a rack mount, this one’s for you.
Continue reading “Turing Pi 2: The Low Power Cluster” →

At Last! A Cyberdeck You Might Want To Use

May 31, 2022 by Jenny List 14 Comments

Cyberdecks make for interesting projects, some are a bit rough while others are beautiful, but it’s maybe something that even the most ardent enthusiast might agree — these home-made portable computers aren’t always the most convenient to use. Thus we’re very pleased to see this machine from [TRL], as it takes the cyberdeck aesthetic and renders it in a form that looks as though it might be quite practical to use.

It takes a Raspberry Pi and a Waveshare 1280×400 capacitive touch screen, and mounts this combo with a keyboard in an uncommonly well-designed 3D printed chassis. With the screen flat it resembles the venerable TRS-80 Model 100 “slab” computer of the early 1980s, but flip it up, and a surprisingly usable laptop appears. Power comes from an external battery pack with a lead, but this is due more to thermal management issues with PSU boards than it is to necessity. The finishing touch is a stylish custom laptop bag, making for a combo we’d take on the train to bang out Hackaday articles any day.

Looking around, we think perhaps it might give the Clockwork DevTerm a run for its money. Alternatively, you might take a look at this upgraded TRS-80 model 100.

Continue reading “At Last! A Cyberdeck You Might Want To Use” →

A Raspberry Pi As An Offboard Display Adapter

May 9, 2022 by Jenny List 6 Comments

The humble USB-C port has brought us so many advantages over its USB ancestors, one of which is as a handy display output for laptops. Simply add an inexpensive adapter and you can hook up everything from a mobile phone upwards to an HDMI display or projector. There’s a snag though, merely having USB-C is not enough as the device has to support the display feature. It’s a problem [Gunnar Wolf] had to face with a Lenovo ARM laptop, and his solution is unexpected. Instead of an adapter, he’s used a Raspberry Pi 3 and some software tricks.

The obvious route to an off-board Pi mirroring onboard video is to use VNC, which he tried but found wanting due to lagginess. As a user of the Wayland compositor he found he could instead use wf-recorder and send its output to a stream, and thus capture his screen in a way that the Pi could read over the network. It’s not quite as convenient a solution as a pure-hardware adapter, but at least it allowed him to share the screen.

It’s surprising how often we find projects needing to mirror the display of a computer using what hardware is to hand, at least this one is more elegant than some others.