This, of course, means an I2C programmable oscillator in the form of an LPC810. [kodera2t] built this circuit after reaching for a 555 timer a few too many times. It’s a one-chip solution with ...

The project is aimed at Arduino-based circuits, but any chip with an ADC will work. The 555 timer is used as a free running oscillator. We know that this not be very stable when compared to even ...