For an upcoming project I need a variable clock source: up to 50MHz and as low as 10KHz. So I looked up VXCOs, PLLs, DDSs, etc etc. all not quite what I wanted.
And then I found this, the LTC6903, 1KHz-68MHz SPI (or I2C) programmable oscillator, 8 pins,
As Javaman says, “its like a monk that can control his own heartrate”
Congrats LTC690x, you are the Chip of the Week!
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.