How to Use IchigoJam T: Examples, Pinouts, and Specs

The IchigoJam T is a compact, educational microcomputer designed to introduce beginners to programming and electronics. It features a built-in BASIC programming language, making it easy to write and execute code directly on the device. With its simple interface and support for various input/output devices, the IchigoJam T is an excellent tool for teaching coding concepts, hardware interaction, and prototyping small projects.

• Teaching programming fundamentals to students and beginners
• Prototyping simple electronic circuits and projects
• Controlling external devices such as LEDs, sensors, and motors
• Building interactive educational tools and games
• Learning hardware-software integration in a hands-on manner

The IchigoJam T is designed to be user-friendly while offering sufficient functionality for educational and prototyping purposes. Below are its key technical specifications:

The IchigoJam T features a simple pin layout for connecting external devices. Below is the pin configuration:

The IchigoJam T is straightforward to use, making it ideal for beginners. Follow the steps below to get started:

1. Power the Device: Connect the IchigoJam T to a 5V power source using a USB cable or an external power supply.
2. Connect a Display: Use the composite video output to connect the IchigoJam T to a monitor or TV.
3. Attach a Keyboard: Plug a PS/2 keyboard into the keyboard input port for programming and interaction.

The IchigoJam T uses a built-in BASIC interpreter. Here's an example of a simple program to blink an LED connected to pin P0:

10 OUT 0,1  ' Turn on the LED connected to pin P0
20 WAIT 30  ' Wait for 0.3 seconds
30 OUT 0,0  ' Turn off the LED connected to pin P0
40 WAIT 30  ' Wait for 0.3 seconds
50 GOTO 10  ' Repeat the loop

• LEDs: Connect the anode (longer leg) of the LED to a GPIO pin (e.g., P0) and the cathode (shorter leg) to a resistor, then to GND.
• Sensors: Use analog or digital GPIO pins to read sensor data.
• Motors: Use a motor driver circuit to control motors via GPIO pins.

• Always use resistors with LEDs to prevent damage.
• Avoid exceeding the maximum current rating of GPIO pins (typically 4 mA per pin).
• Use external pull-up or pull-down resistors for stable input readings.

1. No Display Output

   • Ensure the composite video cable is securely connected to the monitor and the IchigoJam T.
   • Verify that the monitor is set to the correct input source (NTSC).

2. Keyboard Not Working

   • Check if the PS/2 keyboard is properly connected.
   • Use a compatible PS/2 keyboard, as USB keyboards with adapters may not work.

3. Program Not Running

   • Ensure the program is written in valid BASIC syntax.
   • Use the LIST command to review the program and check for errors.

4. GPIO Pins Not Responding

   • Verify the connections to external devices.
   • Check if the pin mode is correctly configured in the program.

Q: Can I power the IchigoJam T with batteries?
A: Yes, you can use a 5V battery pack or a regulated power supply to power the device.

Q: Is it possible to save programs on the IchigoJam T?
A: Yes, you can save programs to the device's memory using the SAVE command and load them later with the LOAD command.

Q: Can I connect the IchigoJam T to an Arduino?
A: Yes, you can interface the IchigoJam T with an Arduino using GPIO pins for communication.

By following this documentation, you can effectively use the IchigoJam T for learning, teaching, and prototyping projects.