|Finished left side of display panel LED matrix (seen from rear)|
|Left side of LED matrix, front view. A grid in front will separate the lights into cells behind a 'smoked glass' plastic faceplate . These lights are the contents of six of the 1130 registers.|
I found a couple of errors in the complex right hand board which I will correct tomorrow, then do a full scale test of the driver board and light matrix. As a quick and dirty way to make use of the light panel before I build the actual enclosure that will host it as a pedestal, I will put the LED boards and the rotary switch on a triangular mailing tube that is roughly the size of the enclosure face.
|Starting the wiring of the right hand panel with its 'packing' of lights in different sections.|
|Reader mechanism with LED lights replacing incandescent lamps.|
I will do a quick breadboard tomorrow to establish the resistor values for reliable detection and to get the relay driver for the motor working properly. The motor runs on 120V utility AC, which I will switch with a relay controlled by the interface, and route 3.3V for the LED lamps in the tape reader.. Even when I make a design for the interface board, I will not order it yet, since it makes sense to add on the logic required for the Tally paper tape punch which I have not yet designed.
|Beginning to investigate solenoid, motor control and photodetector array.|