Hackaday

Circuit VR: Arduino Virtually Meets Analog

There was a time when building electronics and building software were two distinct activities. These days, almost any significant electronic project will use a CPU somewhere, or — at least — could.
EDN

DIY Arduino Voltmeter and Voltage Divider

Here is a useful circuit for Arduino lovers and experimenters. It is a simple digital voltmeter, which can safely measure input dc voltages in 0 to 30V range. The Arduino board can be powered from a ...
note

Arduinoでアナログ電圧計測し、Streamlitでブラウザから確認する

こちらの記事の中でセットアップしたArduinoサーバに、別のPCからStreamlitを立ち上げて電圧値を取得するようリクエストを投げることで、その結果を表示するwebサーバを立ち上げます。 以下の記事で作っていたソーラーパネルによる充電回路の様々な箇所と ...
GitHub

esp_io_expander.h

IO_EXPANDER_PIN_NUM_0 = (1ULL << 0), IO_EXPANDER_PIN_NUM_1 = (1ULL << 1), IO_EXPANDER_PIN_NUM_2 = (1ULL << 2), IO_EXPANDER_PIN_NUM_3 = (1ULL << 3), IO_EXPANDER_PIN ...
GitHub

esp_io_expander.c

#define VALID_IO_COUNT(handle) ((handle)->config.io_count <= IO_COUNT_MAX ? (handle)->config.io_count : IO_COUNT_MAX) * @brief Register type static char *TAG = "io ...