Avro and Schema Registry in Kafka: practical setup https://sudonull.com/avro-and-schema-registry-in-kafka-practical-setup
Setting up Apache Avro with Schema Registry in Kafka cluster: docker-compose, class generation, serializers for producers/consumers. Transition from JSON to typed schemas. Instructions for middle/senior developers.
Capacitance Meter on ATmega8: schematic and code https://sudonull.com/capacitance-meter-on-atmega8-schematic-and-code
Building a device for measuring C capacitors using RC charging method. Schematics, PCB in EasyEDA, AVR code, Kompas 3D case. For middle/senior embedded developers.
Reaction game on ATmega32 for two players https://sudonull.com/reaction-game-on-atmega32-for-two-players
Create a DIY gadget on ATmega32: three LEDs per player, count to 3, animation. Schematic, soldering, firmware for embedded developers. Assemble your prototype in an evening.