1 - 25 of 9,286 ads for "lego" Sign up or log in to customize your list. Here's how it works: Anybody can ask a question The best answers are voted up and rise to the top I'd like to find a way to make my Raspberry Pi control some Lego motors, and as a bonus I'd like to make use of one or more optical sensors. Normally, Lego robotics make use of the Mindstorms "brick" controller - this appears to be expensive and mostly redundant if you have a Raspberry Pi to issue commands. The Mindstorms controller is a processor and a motor-controller which can run without connection to a PC but lacks Ethernet and many features of modern computers. Is there any alternative platform that will allow me to control and receive data from Lego creations? FYI, this is for a simple bug alerting machine. The device will monitor the status of a Jenkins test framework and perform an action depending on the number of unit-test cases which are failing. The raspberry pi will poll a web-page which contains some easily parsed XML.
If the number of bugs > 0, then we'd like to to make the Raspberry Pi start driving the machine. The standard Lego Mindstorms sensors are analogue (i.e. a voltage between 0-5?V), or digital (I²C or RS-485) (source). I don't think the Raspberry Pi has a broken out pin in the GPIO for an ADC (analogue to digital converter), so we can't interface with analogue sensors (without an extra microcontroller). The Raspberry Pi does have two pins in the GPIO for I²C, which means that if you connect GND, +V, SDA and SCL to your sensors, you should be able to use an I²C library to talk to them. There's a driver here - if you follow the instructions you should be able to send and receive I²C signals as easily as this (talking to an TI TMP102): raspberrypi bootc # echo tmp102 0x48 > /sys/class/i2c-adapter/i2c-0/new_device raspberrypi bootc # sensors temp1: +21.6°C (high = +160.0°C, hyst = +150.0°C) There are a few articles on how to connect sensors and motors on this page, such as connecting a Mindstorm brick controller to an external microcontroller:
There is BrickPi+ helps you connect LEGO sensors and motors to the Raspberry Pi and replaces the MINDSTORMS Brick. Mindstorms is the only totally LEGO way of controlling more LEGO. The current NXT 2.0 is quite expensive, but you could pick up an older RCX kit (that is just an example) for something like 1/3 price of the NXT 2.0 on the web. Otherwise, you're going to have to look to a different motor/sensor kit that you might be able to attach to LEGO. These aren't exactly easy to find, and can be quite expensive; it might be worth trying to find someone who knows more about them if you go down this route. to get a snapshot of the market. (I discovered it a month or two ago. It's a great place to find info on the current market value of LEGO sets on ebay.) There is an alternative to all this, connect the NXT sensors and motors to the NXT control unit and then pair it via Bluetooth with the Pi, you can then send commands direct to the NXT to control it's motors and read it's sensors.
check out the Mindstorms bluetooth developer kit, this allows the NXT to be completely wireless !!!!! Sign up or log in Sign up using Google Sign up using Email and Password Post as a guest By posting your answer, you agree to the privacy policy and terms of service. Not the answer you're looking for? Browse other questions tagged gpio peripherals sensor or ask your own question.The requested URL /shop/index.php?page=shop.product_details&flypage=shop.flypage&product_id=2194&category_id=157&manufacturer_id=0&option=com_virtuemart&Itemid=1 was not found on this server.LEGO® is a trademark of The Lego Company. This page is fan created and not endorsed by any Lego company. All pictures of sets are owned by the Lego® company.We have a great range of battery powered ride-on toys, including electric scooters, cars, trains and tractors. Every product at Toys R Us is carefully sourced from trusted specialist manufacturers, such as Peg Perego, John Deere, Razor and Feber, to guarantee only the best quality for you.
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