Overview of System
The AR81 has been designed to provide a easy to use and flexible test system for most 8 bit logic boards and is ideally suited to arcade PCBS based around 8 bit processors using a maximum of 16 bits for addresses.
There are four sections to the AR81:
1) The Unit Under Test Interface.
This is provided by an Arduino unit and this controls the data and address buses plus more. It runs a operating system called the A.O.S which will respond to low level commands. The Arduino handles all the hardware controls and operates continuously. A two line, 8 digit LED display is also linked to the Arduino and this displays Address, data and probe information.
2) The User Interface.
This is the front end and gives the user a easy to use screen which by clicking buttons will allow various features and functions to be performed. A Raspberry Pi 3 is the hub of this and it is linked to a 3.5 inch LCD, Arduino and the USB and HDMI connections. The Raspberry Pi is loaded with a 16GB memory card containing a custom version of Raspbian and the Desktop screen has the Test software link which runs the main code.
3) The Probe Input.
The probe input is fed into an analogue circuit which allows it to measure and test various signal types such as Audio, Logic and voltages up to 100VDC.
4) Power Supply.
The AR81 has 4 internal supply lines to power all the different sections of hardware. These are all generated from a common 9VDC supply input rated at 1.5 amps. Total current drawn is approx 750mA without any external hardware plugged in.
Whats in the Box
Content Coming Soon