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A practical guide for the development with the microcontrollers ATtiny 24/44/84 and 25/45/85
Updated on Sep, 2026
IT and Software , Hardware, Arduino
Duration - 6.5 hours
Training 5 or more people ?
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ATtinys are low-cost microcontrollers that impress with their small form factor and low power consumption (~4-8µA during DeepSleep). The ATtinys can be programmed easily and quickly in the familiar Arduino environment (IDE and C++), so you have a cheap alternative to the Arduinos and ESPs. The ATtinys can be operated with a button battery CR2032 and have enough memory for common DIY projects.
For the whole course, the ATtinys 25/24, 44/45 and 84 as well as the Digispark ATtiny85 are used.
Basics of Atmel ATtiny microcontrollers.
Getting to know different components like transistors, OLED displays, shift registers and much more.
Getting to know different upload variants for flashing the ATtinys.
Use of Visual Studio Code with PlatformIO or Arduino IDE.
Set hardware configurations like CPU clock frequency, brown-out detection etc.
Use of digital-analogue GPIOs and PWM controls.
Praxisbeispiel: Digital dice with random number and LEDs.
Praxisbeispiel: Digital dice with WS2812b and FastLED.
Praxisbeispiel: Binary clock with RTC Module and Shift Register.
Praxisbeispiel: Plant monitor and sleep with CR2032 Battery.
Praxisbeispiel: Plant monitor with OLED.
Praxisbeispiel: Tones (creating own Melody) as circuit board pendan.
Praxisbeispiel: Transistor circuit with reedswitch and clap detector.
Praxisbeispiel: Temperature sensor with OLED 0,96” at Digispark ATtiny85.
Praxisbeispiel: DIY Rubber Ducky with Digispark ATtiny85.
No (ok, only very few) slides/PowerPoint but more projects. We start with the basics immediately with a practical example. You can also try out the theory immediately with the ATtinys and thereby understand it better.
The practical projects are developed together in step-by-step instructions.
In this context, together means that I demonstrate the code, depending on the task, and you can follow the execution or rebuild your own way.
All codes are available for download on the platform, so you can get to the result without frustration.
No lengthy explanations or theory monologues, we start right away in the basics chapter.
Benefit from my years of experience and get the key skills in microcontroller development.
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See you in class Markus Edenhauser
What is an ATtiny and which variants are available?
Technical data and pinout discussion.
Effect of CPU clock speed and power supply.
Power saving mode Sleep and interrupts.
Brown-out detection and CPU clock setting with fuses.
Apply hardware settings with Arduino IDE and PlatformIO (Fuses).
Source Code Creation with C++.
Configuring and setting up Visual Studio Code with PlatformIO and Arduino IDE.
Get to know different ATtiny cores and sources of supply.
Create Arduino ISP DIY Shield for flashing.
Use USB ISP Flasher.
Use different upload methods with different IDEs.
LED control with PWM.
Use of WS2812b and FastLED with ATtiny.
RTC module and shift register usage with ATtiny.
Evaluation of humidity sensor and sleep.
first experiences in Arduino development (millis, pinMode, data types) advantageous.
Basics C++ in the Arduino environment.
With the online simulators a lot can be simulated, but you have a greater learning success if you rebuild the practical examples with the hardware components.
Everything about ATtiny is taught in this course.
Check out the detailed breakdown of what’s inside the course
Markus Edenhauser, MA MSc, geboren 1985 in Tirol/Österreich, begann als Werkmeister für Elektrotechnik und erwarb später zwei Master-Abschlüsse in Wirtschaftsinformatik und systemischem Coaching.
Er leitete über 5.000 Stunden an Trainings und Beratungen, inspirierte mehr als 25.000 Menschen in seinen Online-Kursen und entwickelte über 40 weltweit genutzte Online-Kurse. Zusätzlich veröffentlicht er regelmäßig Fachbücher zu Themen wie systemischem Coaching und Mikrocontroller-Entwicklung.
Wir sehen uns im Kurs.
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