Hello world electronics

Hello world electronics from the CBA hello world page, with community annotations - Add yours!

serial output

Simple board which uses RS-232 (serial) communications to send the 8 bit ASCII string "Hello World!" again and again at 9600 baud.

Two versions of the program code - one written in assembler, the other in C.

• hello.serial.45.cad - electronics schematic
• hello.serial.45.asm - assembler code
• hello.serial.45.hex - machine code (compiled)
• hello.serial.45.c - C code
• makefile - Make file for C code

serial echo

Slightly more complicated board which uses RS-232 (serial) communications to listen for text strings and echo them back at 9600 baud.

Again, both assembler and C code, but also a verion for ATTiny44.

• hello.echo.45.cad - schematic, ATTiny45
• hello.echo.45.asm - assembler code, ATTiny45
• hello.echo.45.c - C code, ATTiny45
• makefile - Make file fyrir C code, ATTiny45

• hello.echo.44.cad - schematic, ATTiny44
• hello.echo.44.asm - assembler code, ATTiny44

Button

Simple circuit with a button. When you press the button the circuit sends a message through RS-232.

• hello.button.45.cad - schematic
• hello.button.45.asm - assembler code

Light sensor

Simple light sensor

• hello.light.45.cad - schematic
• hello.light.45.asm - assembler code

• hello.light.45.py - Python program which listens for output and displays results.

Temperature sensor

Simple temperature sensor

• hello.temp.45.cad - schematic
• hello.temp.45.asm - assembler code
• hello.temp.45.py - Python program which listens for output and displays results.

Step response (resistence, capacitance, inductance, location, distance,..)

Circuit which listens for any kind of step response. Connect sensors to conduct measurements!

• hello.step.45.cad - schematic
• hello.step.45.asm - assembler code

• hello.step.45.py - Python program which listens for output and displays results.

Microphone

Microphone circuit. Sends audio back through RS-232.

• hello.mic.45.cad - schematic
• hello.mic.45.asm - assembler code
• hello.mic.45.py - Python program that displays the waveform in realtime.
• hello.mic.44.cad - ATTiny44 version of the same circuit.

RGB LED

Circuit with an RGB LED.

• hello.RGB.45.cad - schematic
• hello.RGB.45.asm - assembler code - program that rolls through the spectrum using PWM

LED array

Circuit which uses Charlieplexing to make a LED array.

• hello.array.44.cad - schematic
• hello.array.44.asm - assembler code
• hello.array.44.2.cad - dual layer circuit board; harder to make but doesn't require bridges.

LCD screen

Circuit that controls an LCD screen

• hello.LCD.44.cad - schematic
• hello.LCD.44.asm - assembler code

Video control

Display an image on a TV screen.

• hello.video.44.cad - schematic
• hello.video.44.asm - assembler code

Speaker

Control a speaker

• hello.speaker.45.cad - schematic
• hello.speaker.45.pwm.asm - assembler code that uses PWM
• hello.speaker.45.wave.asm - assembler code that uses waveforms

DC motor

Controls a DC motor using a H-bridge

• hello.H-bridge.44.cad - schematic
• hello.H-bridge.44.asm - assembler code

stepper motor

Controls a stepper motor

• hello.stepper.44.cad - schematic
• hello.stepper.44.full.asm - full control
• hello.stepper.44.wave.asm - wave control
• hello.stepper.44.half.asm - half control

Old hello world projects

serial output, programming clip (hello)

• schematic: hello.sch
• PCB: hello.brd
• Gerber: hello.cmp / hello.vinyl.cmp
• assembly code: hello.asm
• hex file: hello.hex

serial I/O, programming clip (hello1)

• schematic
• PCB
• Gerber
• serial output

• serial echo

output: LED (hello2)

• schematic
• PCB
• serial output
• blink LED with serial output

input: step-response (hello3)

• schematic
• PCB
• serial output
• measure and send step-response curve
• receive and plot step-response curve

Efe: button+LED

• schematic

• PCB
• serial output
• blink the LED
• measure charging
• plot charging

A/D: light/sound/temperature (hello4)

• schematic

• PCB
• serial output
• measure A/D
• measure temperature
• plot readings

D/A: speaker (hello5)

• schematic

• PCB
• PWM
• wavetable synthesis

display: LCD (hello7)

• schematic
• PCB

  display hello world: master slave processor

video: RS170 (hello8)

• schematic

• PCB
• display hello world
• RS170

motion: stepper (hello9)

• schematic
• PCB
• Gerber

• stepper

multiplexing: LED array (hello10)

• schematic
• PCB
• multiplexing

Now you should make your circuit board see more information on Making_circuit_boards_on_Modela