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Single-Step / Multi-Step Variable Speed CPU Clock Module

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Info

 

PCB v1.0: Top

 

PCB v1.0: Bottom

PCB is out for manufacture.

 

 

Eagle CAD: v1.0 Schematic

 

Eagle CAD: v1.0 Board Layout

 

 

Eagle CAD: BoM (Bill of Materials)

 

Description:

This PCB is based on Ben Eater's CPU Clock module breadboard design.

 

Features:

 - Modes are selected via a slide switch

 - In Monostable mode, each press of the tactile switch will cause a square wave pulse

 - In Astable mode, the clock runs freely according to how little resistance is selected with the trimpot

 - Halt input allows CPU to halt the clock output to the CPU

 - Test points are available at: Astable, Monostable, Bistable Select, CPU Clock and Halt

 - LEDs at each output test point

 

Power Input:

 - Power is from a diode-protected 5v 2-wire connector or miniUSB

 

Updated 2022-09-24 @ 8am

 

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