Other Boards

This is a Mini Real-Time Clock module, it's design for the Raspberry Pi, but it can also be used with an Arduino.
Simply plug this tiny module into the GPIO header on the Raspberry Pi and away you go! 

• DS3231 RTC IC
• Self-adjust 3.3V and 5V
• Size: 14x14x12 mm

Features:

• Smaller
• Work in 3.3V and 5V
• Supported Raspberry Pi and Arduino

• 1x RTC Module
• 1x Battery

• Adding a Real Time Clock to Raspberry Pi

Description:

There are two L9110S motor controller chips onboard
This module can simultaneously drive two DC motors or a 4-wire 2-phase stepper motor

Feature:

Work under low static current
Power supply voltage: DC 2.5V - 12V
Each channel has 800mA continuous current output
Low saturation pressure drop
TTL / CMOS output level compatible, can be connected directly to the CPU
Output built-in clamping diode, apply to the perceptual load
Control and drive integrate in IC
Pin high pressure protection function
Working temperature: 0°C - 80°C
Size: 29 x 21mm(L x W)

Circuit diagram:
 

Package includes:

  1x L9110S stepper motor driver

Robot control with Python

If you’ve ever tried to connect a 3.3V device to a 5V system, you know what a challenge it can be. The SparkFun bi-directional logic level converter is a small device that safely steps down 5V signals to 3.3V AND steps up 3.3V to 5V at the same time.

This level converter also works with 2.8V and 1.8V devices. What really separates this Logic level converter from our previous versions is that you can successfully set your high and low voltages and step up and down between them safely on the same channel. Each level converter has the capability of converting 4 pins on the high side to 4 pins on the low side with two inputs and two outputs provided for each side.

The level converter is very easy to use. The board needs to be powered from the two voltages sources (high voltage and low voltage) that your system is using. High voltage (5V for example) to the ‘HV’ pin, low voltage (3.3V for example) to ‘LV’, and ground from the system to the ‘GND’ pin.

Dimensions: 0.63 x 0.52" (16.05 x 13.33mm)

Documents:

• Schematic
• Eagle Files
• Datasheet (BSS138)
• Hookup Guide
• GitHub
• Product Video

The Raspberry Pi does not feature an Analog-to-Digital Converter (ADC), so if you want to measure analogue singals, you'll need this 12-Bit ADC!

The Adafruit 4-Channel I2C 12-Bit ADC is a high-precision ADC and features the ADS1015 chip, which provides 12-bit precision at 3300 samples/second over I2C. The chip can be configured as 4 single-ended input channels, or two differential channels. As a nice bonus, it even includes a programmable gain amplifier,with up to x16, to help boost smaller single/differential signals to the full range. We like this ADC because it can run from 2V to 5V power/logic, can measure a large range of signals and its super easy to use. It is a great general purpose 12 bit converter. 

• Wide Supply Range: 2.0V to 5.5V
• Low Current Consumption: Continuous Mode: Only 150µA Single-Shot Mode: Auto Shut-Down
• Programmable Data Rate: 128SPS to 3.3kSPS
• Internal Low-Drift Voltage Reference
• Internal Oscillator
• Internal PGA
• I2C Interface: Pin-Selectable Addresses
• Can run from 2V to 5V power/logic
• Measures a large range of signals and is super easy to use.
• 12-bit precision at 3300 samples/second over I2C.
• Configurable as 4 single-ended input channels, or two differential channels.
• Includes a programmable gain amplifier, up to x16, to help boost up smaller single/differential signals to the full range.
• Breakout Board equipped with ferrites to keep the AVDD and AGND quiet

Tutorials

Four Channel ADC Breakout

Example Code for the Raspberry Pi

Eight super-bright RGB LED indicators that are ideal for adding visual notifications to your Raspberry Pi without breaking the bank!

Inspired by Alex Ellis' work with his Raspberry Pi Zero Docker Cluster, we developed these boards for him to use as status indicators. Blinkt! offers eight APA102 pixels in the smallest (and cheapest) form factor to plug straight onto your Raspberry Pi.

Each pixel on Blinkt! is individually controllable and dimmable allowing you to create gradients, pulsing effects, or just flash them on and off like crazy. The data and clock lines are connected to GPIO #23 and #24 respectively but for simplicity you can just use our Python library to drive them.

Features

• Eight APA102 RGB LEDs
• Individually controllable pixels
• Sits directly on top of your Pi in a tiny footprint
• Fits inside most Pi cases
• Doesn't interfere with PWM audio
• Blinkt! pinout
• Compatible with Raspberry Pi 3, 2, B , A , Zero, and Zero W
• Python library
• Comes fully assembled

Software

Our Blinkt! Python library will have you blasting out rainbows in two shakes of a unicorn's tail! There's a stack of examples too, from binary clocks to cheerlights and flickering candles to Larson scanners!

Notes

• Be careful to plug in your Blinkt! the correct way round, it has curves on the top that match the corners of your Raspberry Pi.
• The dimensions of Blinkt! are 65mm long x 8mm wide x 8.5mm thick (thickness includes header and pixels).

We featured Blinkt! on a special episode of Bilge Tank where we tried to come up with as many different code examples as possible in one morning. Check it out below.

Pic is for illustration purposes only.

Colours might differ between blue and red as per manufacturer stock availability.

This T shaped breakout board makes it easier to use the GPIO pins as it is bigger in size and labeled.

The board also tightly fits on to a breadboard making electronic experiments much easier.

• 40 Pins means it's ready for use on the Pi3B,Pi2B and B

• 1 x T Style 40-Pin GPiO Breakout Board

• Understanding Breadboards

• 8 channels bidirectional voltage translation between different logic level, translate between Ax and Bx automatically
• 4 pairs of power supply interfaces, supports more situations
• Use tantalum capacitors for power filter, provides more stability
• Voltage level: 1.8V-6V
• Dimension: 31.6mm x 25.4mm

In the case of translating between 3.3V and 5V system:

• VCCA/VA connects to 3.3V power supply
• VCCB/VB connects to 5V power supply
• GND connects to power negative pole respectively, the two power supply should be common-grounded with each other
• When Ax has TTL 3.3V input, Bx will get TTL 5V output
• When Bx has TTL 5V input, Ax will get TTL 3.3V output
• NO direction control required

Wiki : www.waveshare.com/wiki/Logic_Level_Converter

Features:

Chip: FT232RL
Draw out all signal port of FT232RL chip
RXD / TXD transceiver communication indicator
USB power supply, can choose 5V or 3.3V, set by jumper
With over current protection, using 500mA self-restore fuse
Pin definition: DTR, RXD, TX, VCC, CTS, GND
Pitch: 2.54mm
Size: 36 x 18mm (L x W)
Interface: Mini USB

The USB to TTL serial adapter is based on the high quality and very popular FTDI FT232RL chipset and is an excellent way to connect TTL serial devices to a PC through a USB port.

This USB to TTL serial adapter is ideal for many uses, including:

Programming microprocessors such as ARM, AVR, etc
Working with computing hardware such as routers and switches
Serial communication with many devices such as GPS devices
Serial terminals on devices like the Raspberry Pi
Unlike most USB to TTL serial adapters, this adapter supports both 5V AND 3.3V operation! Simply set the jumper as required to choose between 5V and 3.3V as labelled on the board.

The adapter comes with a right-angle connector fitted allowing you to use it straight away. If you need to access any of the other inputs or outputs of the FT232RL, all the useful signals are provided as through-hole solder pads - ideal for use with straight headers into a breadboard, for example.

Package includes:

1 x FT232RL USB to serial converter module

The Pi-Stop is a low cost hardware module designed to allow Raspberry Pi users to take their first steps into interfacing with the real world.

Designed with the learning in mind, everyone will recognise and identify its familiar elements encouraging their use along-side their own projects.

Move past the Stop light

The Pi-Stop is designed to remove many of the common hurdles people are faced with when getting started using hardware with the Raspberry Pi. Often it is difficult to know what components to use and how to connect them, the Pi-Stop makes it simple by plugging directly onto pre-set positions on the Raspberry GPIO connector.

By plugging the Pi-Stop directly on to the Raspberry Pi GPIO header, no extra cables or wires are needed. Unlike many other add-on boards, they do not block unused GPIO pins, keeping them open for other uses. The Pi-Stop can be fitted in 4 standard locations, allowing up to four Pi-Stops to be controlled independently or combined with other hardware.

Prepare to go!

The Pi-Stop provides a simple stepping stone, between pure screen based programming and using physical hardware to interact with the real world. Components like the Pi-Stop will provide a flexible and non-restrictive way to build understanding through experimenting.

Since it is only a step away from a bag of components, it also allows the programming of hardware to be introduced, and the electronics involved can be introduced separately, if desired. Allowing the pupils to discover they can control real things, and then again to discover they can also build their own circuits and control them in exactly the same way.

Often, people are faced with a magic board which they plug in and tell it to do stuff, however it isn't always clear to them why or how it does it. By providing something which they can remove and replace with something (apparently) completely different (- wires, breadboards and LEDs) they will be able to understand the link.

By keeping the hardware very simple, it allows better understanding of what is happening, and allows space to come up with your own projects and apply the concepts with your own ideas in mind.

GO Full throttle

The documentation and guides are openly available for the Pi-Stop for educational use. There will be guides, tutorials and workshop material available all of which can be taken as is[available as PDF format] or adapted to your own needs [available in markdown format].

It is encouraged that similar materials can be submitted back for others also to share and make use of.

The materials will demonstrate the concepts, methods and provide the building blocks to explore ideas and take learning further by with creative projects, activities and games.

Pi-Stop Documentation

The following material is available (in both PDF and markdown format):

• Discover: The Pi-Stop: Learn what the Pi-Stop is and how to use it. 
• Setup: Scratch GPIO: Get up and running with Scratch GPIO ready to use with the Pi-Stop.(pdf)
• Explore and Challenge Scratch GPIO: Pi-Stop First Steps: If you've not used Scratch before, this will provide a quick introduction to building your first Scratch GPIO program. (pdf)
• Explore and Challenge Scratch GPIO: Pi-Stop Traffic Sequence - Create your own traffic light sequence and learn how to use Scratch GPIO with the Pi-Stop. (pdf)
• Explore and Challenge Scratch GPIO: Pi-Stop Reaction Game - How fast are your reflexes? Test your reaction time with the Pi-Stop Reaction game. (pdf)
• Explore and Challenge Scratch GPIO: Pi-Stop Simon Memory Game - Challenge your memory and get the highest score! (pdf)

Package Includes:

• Supports any revision of Raspberry Pi (directly-pluggable)
• Provides your Pi with 16 touch keys
• Features TONTEK TonTouch touch pad detector IC TTP229-LSF, supports up to 16 keys with adjustable sensitivity and built-in LDO
• The system re-calibrates automatically when all keys are not detected touch more than about 4 seconds

• Interface : I2C
• Keys : 16
• Sampling rate : 8Hz
• Human Body Mode : 6KV
• Operating voltage : 2.4V-5.5V
• Operating temperature : -40℃ to 85℃
• Storage temperature : -50℃ to 125℃
• Dimensions : 8.5CM × 5.6CM

• After power-on have about 0.5sec stable-time. During the time do not touch the key pad, and all functions are disabled

• VCC : Power supply (2.4V-5.5V)
• GND : Ground
• SDA : I2C SDA
• SCL : I2C SCL

Dimensions



Downloads/Development resources: 

Your microcontroller probably has an ADC (analog -> digital converter) but does it have a DAC (digital -> analog converter)??? Now it can! This breakout board features the easy-to-use MCP4725 12-bit DAC. Control it via I2C and send it the value you want it to output, and the VOUT pin will have it. Great for audio / analog projects, such as when you can't use PWM but need a sine wave or adjustable bias point.

The ADDR pin is broken out so you can connect two of these DACs on one I2C bus, just tie the ADDR pin of one high to keep it from conflicting. Also included is a 6-pin header, for use in a breadboard. Works with both 3.3V or 5V logic.

Some nice extras with this chip: for chips that have 3.4Mbps Fast Mode I2C (Arduino's don't) you can update the Vout at ~200 KHz. There's an EEPROM so if you write the output voltage, you can 'store it' so if the device is power cycled it will restore that voltage. The output voltage is rail-to-rail and proportional to the power pin so if you run it from 3.3V, the output range is 0-3.3V. If you run it from 5V the output range is 0-5V.

Adafruit have an easy-to-use Arduino library and tutorial with a triangle-wave and sine-wave output example that can be used with any 'duino or ported to any microcontroller with I2C host. Wiring it up is easy - connect VDD to your microcontroller power pin (3-5V), GND to ground, SDA to I2C Data (on the Arduino Uno, this is A4 on the Mega it is 20 and on the Leonardo digital 2), SCL to I2C Clock(on the Arduino Uno, this is A5 on the Mega it is 21 and on the Leonardo digital 3) and listen on VOUT.

TECHNICAL DETAILS

• Datasheet, Fritzing, and EagleCAD PCB files available in the product tutorial
• This board/chip uses I2C 7-bit address between 0x62-0x63, selectable with jumpers

RASPBERRY PI BOARD NOT INCLUDED

Description:

Whether you're pulling-up or pulling-down, there's no need to frown! With the PUD board from ModMyPi, adding multiple pull-up or pull-down resistors to your Raspberry Pi project is easy!

If you want to detect an "output" with your Raspberry Pi, like a button being pressed or a motion sensor detecting movement, we can configure our Raspberry Pi's GPIO pin as an "input". That input pin can be in three states (known as Tri-State logic); "high", when 3.3V is applied, "low", when the pin is connected to 0V, and "floating" when the state is undefined. Floating voltages are troublesome in electronics as the input can either read high or low depending on various fluctuations in electrical noise. Like a gate flapping open and closed in the wind, someone needs to lock the gate closed, or wedge it open. If you leave it flapping, it's likely to hit someone on their bottom on the way through!

Like our gate, the best way to avoid a floating input is to "tie" your input pin either high or low to create a default state. This is usually achieved through the use of a pull-up or pull-down resistor, either connecting our input pin via a resistor to the Pi's 3.3V to achieve a 3.3V high state, or the GND line to achieve 0V low state.

Our PUD board takes the messy wiring out of adding a pull-up or pull-down resistor to your circuit. Simply wire up the sensor output to the single pin on the PUD board and add a shunt jumper to either pull up (u) or down (d)! Therefore when you apply a signal voltage from your sensor or switch, the Pi is easily able to sense into which logic state the pin has been pulled! No more trouble from floating I/O's!

The PUD boards connects across GPIO pins 11 to 18 (17 to 24 in BCM speak), and adds a jumper configurable pull-up or pull-down resistor to each GPIO pin: 11 (BCM 17), 12 (BCM 18), 13 (BCM 27), 15 (BCM 22), 16 (BCM 23) and 18 (BCM 24). Pin 17 (3.3V) & pin 14 (GND) are used to tie the pins!

The PUD Board Features:

• Add a pull-up or pull-down resistor to your GPIO with the swap of a jumper!
• Compatible with all Raspberry Pi Models Inc. A /B /2/3 & Zero/ZeroW
• Tiny board means it's easy to integrate into any circuit - takes up just 8 GPIO pins
• Connects across GPIO pins 11 to 18 inclusive (BCM 17 to 24)
• In-line 1kΩ current limiting resistors on each GPIO
• 10kΩ pull-up or pull-down resistors on each GPIO
• All 6 GPIO pins can be configured independently 
• Includes 6 x 2 Pin Shunt Jumpers & 1 x PUD Board
• Jumper configurable pull-up or pull-down resistor on pins:
  • 11 (BCM 17)
  • 12 (BCM 18)
  • 13 (BCM 27)
  • 15 (BCM 22)
  • 16 (BCM 23)
  • 18 (BCM 24).
• Pin 17 (3.3V) & Pin 14 (GND) are used to tie the pins!
• To pull pin up, connect the jumper across "u" and the center pin
• To pull pin down, connect the jumper across "d" and the center pin

Tutorials:

How to use the ModMyPi PUD Board

• The extension board can be used for Small CNC routers, Carving Machine, 3D Printers, DIY Laser Cutters, and almost any project where you need to control a stepper motors with high precision
• This shield allows you to control upto 4 stepper motors
• Controller each stepper motor requires 2 IO Pins only, which saves a lot of IO Pins for other purposes
• Arduino compatible
• Latest Arduino CNC Shield Version 3.10
• GRBL 0.9 compatible. (Open source firmware that runs on an Arduino UNO that turns G-code commands into stepper signals)
• Supports PWM Spindle and direction pins
• 4-Axis support (X, Y, Z , A-Can duplicate X,Y,Z or do a full 4th axis with custom firmware using pins D12 and D13)
• Supports Coolant enable
• Supports removable A4988 compatible stepper drivers. (A4988, DRV8825 and others) (Not Included)
• Jumpers to set the Micro-Stepping for the stepper drivers. (Some drivers like the DRV8825 can do up to 1/32 micro-stepping )
• Compact design.
• Stepper Motors can be connected with 4 pin molex connectors or soldered in place.
• Runs on 12-36V DC. (At the moment only the DRV8825 drivers can handle up to 36V so please consider the operation voltage when powering the board.)
• Uses removable A4988 or DRV8825 compatible stepping driver.