Tap into the potential of your projects to bring those multi-media ideas to life with our range of Audio & Visual products! Within this selection you will discover the ability to create epic light shows, capture photo and film, or delve into the world of high definition audio. Whether you're using a Raspberry Pi, other micro computer, or looking for stand alone options, you can master the realm of sound and colour here.
Here you'll find all the extra bits & bobs that are essential to complete the swag bag of any modern maker! We have a huge number of items that will help fill out your maker tool kit, satisfy your cabling requirements or even boost your connectivity and productivity.
Cases, cases, cases!! Here is our extensive range of fantastic cases and enclosures for your maker movement activities. Choose from the slick & sleek, bold & colourful or weird & wonderful. No hobby project is complete without the perfect case to complete the look and fit the application, and here you should have no problem at all in finding the enclosure that is right for you!
Inside this part of the shop you can find all the bits and pieces you need for your prototyping needs. Here you can kit out your maker station with tools and consumables, as well as other components such as headers, sensors and accelerometers to bring all those epic ideas to life!
Inside this part of the shop you will find a plethora of add-ons for your Raspberry Pi and other micro computers. Our Maker Emporium includes everything from plug-and-play HATs, to breakout kits and boards including sensors, drivers, motors, wearables and much, much more. Here is where any maker can equip themselves with the gizmos and gadgets they need to take their embedded projects to new heights and beyond!
There are so many great things you can do with the Raspberry Pi - almost too many to list! These kits & bundles are one of the best ways of getting involved with everyone's favourite single board computer. Whether you want to build a bespoke project, or just get your hands on the gear you need to get your ideas off the ground, we think these bundles are the fast track to optimum levels of fun!
We carry a large range of power supplies and power solutions which cater to any need that you might have in your maker adventures. Whether you just need a standard mains supply, to be able to make your projects portable, or something a bit more heavy duty, we've got you covered so you never get caught short.
Here at Pi Supply, we love everything offered by the Raspberry Pi... but we love other single board platforms too! We like to offer a range of options that is as wide as possible to help make all your maker dreams a reality. Here is the range of other micro computers that we carry, including Arduino, BeagleBone and micro:bit.
Take a look at all the original products we have to offer here at Pi Supply! Whether you are looking for self-solder kits or fully assembled HATs, you can explore new horizons with Pi Supply, and do even more to unlock the potential of your Raspberry Pi. Check out our range for LED & IR toys, ePaper applications, power solutions and much more to expand your range of projects.
The MonkMakes Relay for micro:bit is a solid-state (no moving parts) relay that allows an output of a micro:bit to turn things on and off.
A micro:bit can turn an LED on and off directly, but anything more powerful requires something like a relay or a transistor. Using a transistor to switch something on and off requires a shared ground connection with the micro:bit and a knowledge electronics that you or your students may not be ready for. The MonkMakes Relay for micro:bit is much easier to use, acting like a simple micro:bit controlled switch.
This relay can be used to switch low voltage devices such as light bulbs, a motor, a small heating element or even a string of 12V LED lighting. The voltage needs to be kept under 16V, but the relay will automatically protect itself against too much current.
Solid-sate relay (up to 2 Amps)
Active LED indicator
Resettable ‘polyfuse’ to protect against over-current
Connecting your micro:bit
The Relay requires just two connections to the micro:bit. One to GND (ground) and one to whatever pin is to be used to control the relay’s switching action.
When attaching the alligator clips to the micro:bit, make sure that the clips are perpendicular to the board so that they are not touching any of the neighbouring connectors on the micro:Bit edge connector.
Here’s an example of how you could wire up a MonkMakes Relay for micro:bit to turn an old fashioned light bulb on and off.
The quickest way to try out your relay is toDOWNLOAD THIS HEX FILE >and then copy it onto your micro:bit. The program will turn the relay on and off once a second.
Set the controlling pin to 1 and the relay contacts will close, set it to 0 and the contacts will open again. Its as simple as that. So, to make your relay turn on and off once a second,open the Blocks Editor, add aforeverblock and then thedigital writeblocks from thepinscategory and thepausesfrom thebasic category.
You can also click on the image of the blocks below to open up the Blocks Editor on this project.
Paste the following code into the Python window and then Download the file and copy it onto your your micro:bit.
from microbit import *
while True: pin0.write_digital(True) sleep(500) pin0.write_digital(False) sleep(500)
The latest MonkMakes Relay for micro:bit can do more than just switch things on and off. It can also be used with micro:bit analog outputs. Look closely at your Relay for micro:bit and is it has the version number v1ev (under the word ‘Board’) then it can be used with the ‘analog write’ block in the blocks editor or the ‘write_analog’ function in MicroPython. If your board has the version number v1e then it is not suitable for use with analog outputs – sorry you were unlucky to get one of the small batch of first boards to be sold.
The output of the Relay for micro:bit is not linear at low PWM and high PWM values as the following chart illustrates.
The y-axis shows the current in mA for a test load resistor supplied from a constant voltage source. The x-axis is the analog write value (0 to 1023). As you can see, there is a dead zone up to a analog output value of about 100, followed by a relatively good linear region right up to about 1000, after which the output effectively becomes ‘on’.
The tests were carried out at the default PWM frequency of 50Hz for the micro:bit. Lower frequency PWM is expected to produce more linear results.