It is one of our favorite chips, and the brains behind the Arduino UNO and its clones ... to need to resort to an external oscillator instead of a simple crystal. This will increase parts cost ...

Enter the oven controlled crystal oscillator, or OCXO ... The ICs on the PCB are hard to identify due to the conformal coating, but at least one appears to be a 74LS00, alongside a 78L05 voltage ...

Starting a crystal oscillator fast in an IoT node is an art: the high Q needed for stability means they take milliseconds to get going, just to transmit a 128μs Bluetooth LE packet, and power is at a ...