Arduino simulator puts you in the driver’s seat of a toy car

via Arduino Blog

As part of their final project at EDN – Navàs, robotics students Rafart Jordi and Marc Thomas recently built an impressive Arduino simulator that captures video from a camera-equipped RC vehicle and displays it on a TV screen, making it feel as though you’re in the driver’s seat of a shrunken-down car.

The simulator is powered by an Arduino Uno along with an IBT-2 H-Bridge to control the 24V motors, and wirelessly communicates with the modified toy car via an XBee module.

You have to see it in action below!

Friday Product Post: Babysitters Club

via SparkFun Electronics Blog Posts

Hello there, everyone! It’s Friday once again, which means we have brand new products to show you today. Last week we had the new Raspberry Pi powered laptop, the pi-top. This week we are here to bring you some new original boards and announce the official release of a long-awaited kit. Without further ado, let’s dive on in and see what we have!

Thanks for giving us a better look into the life of an American babysitter, Shawn!

SparkFun Battery Babysitter - LiPo Battery Manager

$ 19.95

The SparkFun Battery Babysitter is an all-in-one single-cell Lithium Polymer (LiPo) battery manager. It’s half battery charger, half battery monitor, and all you’ll ever need to keep your battery-powered project running safely and extensively.

Get Started With the Battery Babysitter Guide!

SparkFun Electret Microphone Breakout

$ 5.95

This small breakout board couples an Electret microphone (100Hz–10kHz) with a 60x mic preamplifier to amplify the sounds of voice, claps, door knocks or any sounds loud enough to be picked up by a microcontroller’s analog-to-digital converter. Each breakout comes fully assembled and works from 2.7V up to 5.5V.

Get Started With the Electret Microphone Guide!

Web of Things Kit

$ 99.95

We finally got our books in, and the Web of Things (WoT) Kit is now available for purchase!

The WoT Kit is a comprehensive, hands-on kit that teaches about the intersection of the Internet of Things (IoT) and modern web technologies. This kit utilizes the Raspberry Pi 3 model as its medium to teach with a 16GB SD card and USB cable, a prototyping board with jumper wires, and all the various sensors (motion, humidity, temperature) and LEDs. In a few hours, you’ll learn how to use Node.js to build a flexible REST API that allows anyone in the world to interact with your Pi in real time!

That’s all for today, folks. We’ll be back next week with even more new products. See you then!

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Astro Pi: Goodnight, Mr Tim

via Raspberry Pi

On Saturday, British ESA astronaut Tim Peake returned to Earth after six months on the International Space Station. During his time in orbit, he did a huge amount of work to share the excitement of his trip with young people and support education across the curriculum: as part of this, he used our two Astro Pi computers, Izzy and Ed, to run UK school students’ code and play their music in space. But what lies ahead for the pair now Tim’s mission, Principia, is complete?

Watch Part 4 of the Story of Astro Pi!

The Story of Astro Pi – Part 4: Goodnight, Mr Tim

As British ESA astronaut Tim Peake’s mission comes to an end, what will become of Ed and Izzy, our courageous Astro Pis? Find out more at Narration by Fran Scott:

Ed and Izzy will remain on the International Space Station until 2022, and they have exciting work ahead of them. Keep an eye on this blog and on our official magazine, The MagPi, for news!

The post Astro Pi: Goodnight, Mr Tim appeared first on Raspberry Pi.

LDMOS amplifiers

via Dangerous Prototypes


Pete (N6QW) writes:

This project encompasses proving an Arduino Control of a hi Power Linear Amplifier. It is a new departure for N6QW as it has extensive I/O requirements which required moving to the Mega 2560 a Arduino variant that has 56 Digital I/O and 16 Analog Inputs. The on board memory is 256K
The current configuration uses a 3×4 Keypad as the main control element.
Key 1 = Power On
Key 2 = Power Off
Key 3 = Amp Bypass [In this mode the LPF’s are disconnected and the amp power is off it requires RESTART and LPF Selection the TR Relay is disconnected so No RF into the amp on Bypass.LED16 Controls whether the amp is bypassed BUT LED 17 and LED 18 control the actual sequencing of the connection of the amp to the antenna system and the transceiver. WE are trying to avoid “hot switching”. Thus the amp is connected to the antenna first and then the transceiver is connected to the amp. This is done by a small delay on the connection of the amp to the input side. Problem solved!]

More info at N6QW Homebrew Radio blog.

Adding a DHT22 temperature and humidity sensor to the Sonoff

via Dangerous Prototypes

DHT22 temperature

Mikey writes:

Just a few days ago I replaced the firmware on my Sonoff, and immediately after, I wanted more…
After looking on their website, I found a version which also had a DHT11 sensor attached, and I then wanted to do something similar, just with a DHT22 for higher resolution (0.1C on a DHT22, compared to 1C on a DHT11). After digging a bit more in the schematic for the Sonoff, I found that the last pin on the 1×5 pinheader, was connected to GPIO14, so it should not be that difficult to get up and running.

More details at

This funny robot pets your dog’s head and feeds them a treat

via Arduino Blog

While this recent project may look like something straight out of Simone Giertz’s notebook, it’s actually the brainchild of James Cochrane. The engineer, who admittedly loves building all sorts of crazy machines, has developed an apparatus he calls the IoT Robot People/Pet Affectionator.

As its name would suggest, the Affectionator is an Arduino Nano-driven device that automatically gives his dog T-Bone a pat on the head along with a spoon-fed treat at the touch of an arcade button. That’s not all, though. It even allows the pup to reciprocate by pressing his own button and sending over a token of his appreciation on a fork–which in Cochrane’s case is a gummy worm.

Aside from the Arduino, the Affectionator is equipped with two H-Bridge motor drivers, two geared Pittman motors, and two geared hobby motors.

These days people are more connected with each other, however we are experiencing fewer physical interactions. This device will allow you to provide affection either locally or remotely to your pet without any physical contact. If your pet decides you are also worthy of their affection they can also reciprocate with a pat on the head and a tasty treat.

One day while giving my dog T-Bone a scratch behind the ears I came up with this silly idea. A robot which gives you a pet on the head and feeds you a treat. With the IoT, you can also build two of these and network them across the Internet.

Intrigued? Watch the hilarious idea in action below!