Abstrak: Tujuan penelitian adalah untuk merancang, membuat, dan mengetahui kelayakan trainer mikrokontroler Atmega 16. Model pengembangan yang digunakan yaitu model Tessmer. Jenis data kualitatif pada penelitian ini diperoleh dari observasi, wawancara, dan saran dari ahli, laboran dan mahasiswa. Sedangkan data kuantitatif diperoleh dari kuesioner yang diberikan kepada ahli desain, ahli media, dan ahli materi. Pada penelitian ini dihasilkan rancangan trainer yang telah di uji kelayakannya oleh ahli desain dengan skor 87,50%. Selain itu, dihasilkan trainer untuk praktikum mikrokontroler dalam satu semester pada pokok bahasan LED, push button, 7 segment, LCD, ADC, keypad, counter, timer dan PWM. Dihasilkan pula trainer dengan skor uji kelayakan ahli media sebesar 85,40% dan ahli materi sebesar 85,20%. Menurut hasil pretest dan postest mahasiswa pada small grup test terlihat bahwa terdapat kenaikan nilai rata-rata keseluruhan mahasiswa yang sebelumnya 69,70 menjadi 82,30.Kata-kata Kunci: trainer pembelajaran, mikrokontroler atmega 16, bahasa pemrograman C
Abstract: The Development of Learning Trainer Atmega 16 Microcontroller Application using C Programming Language with Codevision AVR and USB ASPDownloader. This research aims to design, make, and know the feasibility of the Atmega 16 microcontroller trainer. The development model used is the Tessmer model. The qualitative data in this study was obtained from observations, interviews, and suggestions from experts, laboratory staff and students. While quantitative data is obtained from questionnaires given to design experts, media experts, and material experts. In this study, the trainer design has been tested by a design expert with a score of 87.50%. The trainer was design to be used in the microcontroller practicum for one semester on LED subjects, push buttons, 7 segments, LCD, ADC, keypad, counter, timer and PWM. The trainer feasibility has also been evaluated by a media expert with test scores of 85.40%, and by material experts with test scores of 85.20%. According to the results of the pretest and posttest of students in the small group test, it revealed that there was an increase in the overall average score of students which was 69.70 to 82.30.