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Variable 1Hz-100Hz CPU Clock Module

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Info

 

Eagle CAD: v1.2 Schematic

 

Eagle CAD: v1.2 Board Layout

 

PCB v1.2: Top

 

Eagle CAD:

v1.2 BoM (Bill of Materials)

 

Video: Speed Adjust & Scope Signal

 

 

Eagle CAD: v1.0 Schematic

 

 

Eagle CAD: v1.0 Board Layout

 

PCB v1.0: Top

 

Eagle CAD:

v1.0 BoM (Bill of Materials)

 

 

 

 

 

Description:

This PCB is based on Ben Eater's CPU Clock module breadboard design but only the astable portion.

 

Features:

 - Output is 1Hz to 500Hz with a 1uF electrolytic capacitor (227kHz with a 1nF cap)

 - Synchronized LED flashes are via the CLOCK or CLOCK output connectors

 - 2-pin socket so you can switch out capacitors for more speed

 - 5v output connector was added in v1.2 to also power the device under test

 - 3mm (0.14") mounting holes

 

Power Input:

 - Power In is from a diode-protected 5v 2-wire connector or miniUSB but not both

 

Updated 2022-12-07 @ 8am

 

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