Android + IOIO + Seven Segment LED
Basic control of a seven segment LED display with IOIO and Android.
For additional background information on interfacing Android with IOIO, check out my other introductory tutorials:
Android + IOIO + Simple Digital Output
Android + IOIO + Simple Digital Input
Android + IOIO + Simple Analog Output
Android + IOIO + Simple Analog Input
Background on Android development, IOIO, and electronics:
Meet IOIO
IOIO for Android Beginners Guide
IOIO Wiki
Android Developer’s Guide
Hardware
Parts needed:
- Android Device (1.6+, 2.1 for Bluetooth)
- IOIO (available at Sparkfun)
- Seven segment LED display
- 330k ohm resistors
- Breadboard
- Power supply
- Hook-up wire
Assembly
The LED display is common anode with pins 3 and 8 (top center and bottom center) to ground with a current limiting 330 ohm resistor in series. Connect the seven segment pins as shown below to IOIO pins 34 -40. The code can be modified for use with any other IO pins (all IOIO pins are GPIO pins). Here is a diagram of the completed circuit (created with Fritzing):
Software
Get the source
With the circuit assembled, the next step is to get the demo application on the Android device. You can either download the pre-built .apk or checkout the source from Github:
git clone git://github.com/mitchtech/android_ioio_seven_segment_led.git
If you are building from source, you will also need to import the IOIO Library project, and optionally the IOIO Bluetooth library projects, both available here:
git clone git://github.com/ytai/ioio.git
Install, connect, profit!
Finally, upload the app to the Android device (or browse to this page on the device and download the apk above). Connect the device to the IOIO, and start up the app.
Android + IOIO + Sensor Graph
A simple app to visualize analog sensor input with Android and IOIO. The example uses a rotary potentiometer, but could easily be used with other sensor inputs such as temperature or ambient light.
For additional background information on interfacing Android with IOIO, check out my other introductory tutorials:
Android + IOIO + Simple Digital Output
Android + IOIO + Simple Digital Input
Android + IOIO + Simple Analog Output
Android + IOIO + Simple Analog Input
Background on Android development, IOIO, and electronics:
Meet IOIO
IOIO for Android Beginners Guide
IOIO Wiki
Android Developer’s Guide
Hardware
Parts needed:
- Android Device (1.6+, 2.1 for Bluetooth)
- IOIO (available at Sparkfun)
- Rotary potentiometer
- Breadboard
- Power supply
- Hook-up wire
Assembly
Connect one side of the potentiometer to +3.3V, the opposite side to GND, and the center wiper to the desired analog input pin on the IOIO. The example uses pin 34, but can be used with any other pin that supports analog input (pins 31 – 46 on the IOIO). Here is a diagram of the completed circuit (created with Fritzing):
Software
Get the source
With the circuit assembled, the next step is to get the demo application on the Android device. You can either download the pre-built .apk or checkout the source from Github:
git clone git://github.com/mitchtech/android_ioio_sensor_graph.git
If you are building from source, you will also need to import the IOIO Library project, and optionally the IOIO Bluetooth library projects, both available here:
git clone git://github.com/ytai/ioio.git
Install, connect, profit!
Finally, upload the app to the Android device (or browse to this page on the device and download the apk above). Connect the device to the IOIO, and start up the app.
Android + IOIO + Servo Control
A simple dual servo controller for Android. The IOIO based device uses slider bars to control two hobby servos.
For additional background information on interfacing Android with IOIO, check out my other introductory tutorials:
Android + IOIO + Simple Digital Output
Android + IOIO + Simple Digital Input
Android + IOIO + Simple Analog Output
Android + IOIO + Simple Analog Input
Background on Android development, IOIO, and electronics:
Meet IOIO
IOIO for Android Beginners Guide
IOIO Wiki
Android Developer’s Guide
Hardware
Parts needed:
- Android Device (1.6+, 2.1 for Bluetooth)
- IOIO (available at Sparkfun)
- 2x Hobby servos
- 2x 10k ohm resistors
- Breadboard
- Power supply
- Hook-up wire
Assembly
Connect the red, power lines of the servos to +5v, the black ground lines to GND, and the yellow signal lines to the desired output pins, 3 and 6 in the example. Other pins can be used as long as they support peripheral output (for PWM, marked with the letter ‘p’ on the back of the IOIO) AND are 5V tolerant (marked with a black circle around the pin). This leaves pins 3-7, and 10-14 as the only potentials. Also, connect the same signal lines to +5V, with a 10k ohm resistor in series. This allows use of the pins in 5V open drain mode, required since the IOIO operates with 3.3V. Here is a diagram of the completed circuit (created with Fritzing):
Software
Get the source
With the circuit assembled, the next step is to get the demo application on the Android device. You can either download the pre-built .apk or checkout the source from Github:
git clone git://github.com/mitchtech/android_ioio_servo_control.git
If you are building from source, you will also need to import the IOIO Library project, and optionally the IOIO Bluetooth library projects, both available here:
git clone git://github.com/ytai/ioio.git
Install, connect, profit!
Finally, upload the app to the Android device (or browse to this page on the device and download the apk above). Connect the device to the IOIO, and start up the app.
Android + IOIO + D-Pad
A simple controller for use as an Android D-pad (directional pad) input accessory. The IOIO based device uses four momentary push buttons to sense digital inputs for up, down, left, and right.
For additional background information on interfacing Android with IOIO, check out my other introductory tutorials:
Android + IOIO + Simple Digital Output
Android + IOIO + Simple Digital Input
Android + IOIO + Simple Analog Output
Android + IOIO + Simple Analog Input
Background on Android development, IOIO, and electronics:
Meet IOIO
IOIO for Android Beginners Guide
IOIO Wiki
Android Developer’s Guide
Hardware
Parts needed:
- Android Device (1.6+, 2.1 for Bluetooth)
- IOIO (available at Sparkfun)
- 4x Push button
- Breadboard
- Power supply
- Hook-up wire
Assembly
Connect one side of each button to ground and the other side to the desired digital input pins on the IOIO. The example uses pins 34-37, but can be used with any IO pins (all IOIO pins are GPIO pins). Here is a diagram of the completed circuit (created with Fritzing):
Software
Get the source
With the circuit assembled, the next step is to get the demo application on the Android device. You can either download the pre-built .apk or checkout the source from Github:
git clone git://github.com/mitchtech/android_ioio_d_pad.git
If you are building from source, you will also need to import the IOIO Library project, and optionally the IOIO Bluetooth library projects, both available here:
git clone git://github.com/ytai/ioio.git
Install, connect, profit!
Finally, upload the app to the Android device (or browse to this page on the device and download the apk above). Connect the device to the IOIO, and start up the app.
Android + IOIO + Dual Analog Input
Dual analog input with Android and IOIO. This article will demonstrate a basic dual analog Android USB (or Bluetooth) analog input device. You guessed it… the Etch-a-Sketch is coming soon!
For additional background information on interfacing Android with IOIO, check out my other introductory tutorials:
Android + IOIO + Simple Digital Output
Android + IOIO + Simple Digital Input
Android + IOIO + Simple Analog Output
Android + IOIO + Simple Analog Input
Background on Android development, IOIO, and electronics:
Meet IOIO
IOIO for Android Beginners Guide
IOIO Wiki
Android Developer’s Guide
Hardware
Parts needed:
- Android Device (1.6+, 2.1 for Bluetooth)
- IOIO (available at Sparkfun)
- 2x Rotary potentiometer
- Breadboard
- Power supply
- Hook-up wire
Assembly
Connect one side of the potentiometer to +3.3V, the opposite side to GND, and the center wiper to the desired analog input pin on the IOIO. The example uses pins 34 and 35, but can be used with other pins that support analog input (pins 31 – 46 on the IOIO). Here is a diagram of the completed circuit (created with Fritzing):
Software
Get the source
With the circuit assembled, the next step is to get the demo application on the Android device. You can either download the pre-built .apk or checkout the source from Github:
git clone git://github.com/mitchtech/android_ioio_dual_analog_input.git
If you are building from source, you will also need to import the IOIO Library project, and optionally the IOIO Bluetooth library projects, both available here:
git clone git://github.com/ytai/ioio.git
Install, connect, profit!
Finally, upload the app to the Android device (or browse to this page on the device and download the apk above). Connect the device to the IOIO, and start up the app.
Android + IOIO + Simple Analog Input
Simplest possible analog input with Android and IOIO. This article will discuss the bare minimal requirements for development of an Android USB (or Bluetooth) analog input device.
The goal is to demonstrate the easiest possible use of the technology. For additional background information on Android development, IOIO, and electronics, check out these links:
Meet IOIO
IOIO for Android Beginners Guide
IOIO Wiki
Android Developer’s Guide
Hardware
Parts needed:
- Android Device (1.6+, 2.1 for Bluetooth)
- IOIO (available at Sparkfun)
- Rotary potentiometer
- Breadboard
- Power supply
- Hook-up wire
Assembly
Connect one side of the potentiometer to +3.3V, the opposite side to GND, and the center wiper to the desired analog input pin on the IOIO. The example uses pin 34, but can be used with other pins that support analog input (pins 31 – 46 on the IOIO). Here is a diagram of the completed circuit (created with Fritzing):
Software
Get the source
With the circuit assembled, the next step is to get the demo application on the Android device. You can either download the pre-built .apk or checkout the source from Github:
git clone git://github.com/mitchtech/android_ioio_simple_analog_input.git
If you are building from source, you will also need to import the IOIO Library project, and optionally the IOIO Bluetooth library projects, both available here:
git clone git://github.com/ytai/ioio.git
Install, connect, profit!
Finally, upload the app to the Android device (or browse to this page on the device and download the apk above). Connect the device to the IOIO, and start up the app.
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