App note: Termination recommendations for single-ended oscillator driving single or multiple Loads

Proper clock signal terminations app note from SiTime. Link here (PDF) Clock signals with fast edges see traces on Printed Circuit Boards (PCB) as transmission lines rather than simple wire connections. If the length of PCB trace exceeds certain limit it requires matching of the trace impedance to one or both of the source and […]

Clock source for the EasyDriver

Henrik designed and built an adjustable clock source for the EasyDriver that maintains the same motor speed over a range of step resolutions. It adjusts the driving frequency depending on the resolution of steps the EasyDriver makes per input pulse. EasyDriver is a stepper motor driver that moves the motor one preselected step for every […]

Partlist Wednesday: Clock sources

Every Wednesday we highlight a component from the updated Dangerous Prototypes partlist. This week: clock sources. As always, there are footprints for all these parts and more in our public domain Cadsoft Eagle part library. In our workshop the first rule of crystal selection is ‘use a surface mount HC-49/US package if it will fit’. […]