cardboard prototype Archives - FritzenLab electronics

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FritzenLab electronics

Electronics and embedded systems

FritzenLab electronics

Electronics and embedded systems

555 Oscillator
555 Timer
Bicycle speedometer with ESP-12
Buttons on analog pins of Arduino
Electronic dice in keychain format
FritzenLab ESP32-C3 Super mini dev board
FritzenLab ESP32-C6 dev board
FritzenLab projects
Keychain thermometer
Mini USB WiFi thermometer with ESP32
PIC16F690 development kit
Pomodoro study timer with PIC12F675
PWM with 555
Ruler with an embedded thermometer
The amazing me

Arduino cardboard prototype

A PCB mockup out of cardboard

by fritzenlab
January 14, 2026

A mockup prototype of Arduino circuit with cardboard

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Repairing an Arduino nano – replacing ATMEGA328
How to use PWM with Arduino
Reading NTC temperature sensor with Arduino
Manipulating digital IO wih Arduino
Bicycle speedometer project – update 2

555 Oscillator
555 Timer
Bicycle speedometer with ESP-12
Buttons on analog pins of Arduino
Electronic dice in keychain format
FritzenLab ESP32-C3 Super mini dev board
FritzenLab ESP32-C6 dev board
FritzenLab projects
Keychain thermometer
Mini USB WiFi thermometer with ESP32
PIC16F690 development kit
Pomodoro study timer with PIC12F675
PWM with 555
Ruler with an embedded thermometer
The amazing me

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