Digispark controls ESC – I2C and manual control
As you might have guessed, i’ve built a (small) 3-axis CNC machine. Main control is via a Arduino Uno R2. The spindle consists of a brushless motor, a ESC and a digispark. More details to follow soon …
Archive for the ‘arduino’ Category
Arduino: internal pullups are often not enough
So the same issue hit me twice: the on-chip, programmable pullups are only reliably doing their work if the environment is clean: electrical noise from steppers triggered interrupts the zener diode on the pwm1b pin4 of a digistump made it float around Adding 10k/4k7 pullups and 33n debounce caps did the trick.
Developing for Arduino on Eclipse
As a side-project I started to develop on the Arduino platform (more on the project-of-the-day later). First Steps Getting going on windows was easy: setting up Arduino 1.0.1, compiling and running the “blink” demo, changing the frequency etc … was straightforward. Then: i found grbl. Flashing the premade 0.8a firmware from grbl – instant success. [...]
