30th-Nov-24, 07:22 PM
Update:
The PCB backplanes correctly fit the 4inch 7 seven segment displays.
The dual voltage regulator circuits function correctly - the multi-digit display is powered by a 15V Hornby PSU. This is regulated down to 12V for the display common anodes and it is further regulated down to 5V for the control logic. All now functioning correctly.
Also, the optically isolated input correctly reads the three input signals (Serial data, serial clock and Latch). This consists of a correctly biased four channel ACSL6400 opto-isolator followed by signal inversion using a 74HC04. All working nicely.
Next task is to assemble all the required modules i.e. 2 x white digits, 5 x red digits and 2 x green digits.
Then the final stage: connecting the display to the track sensors and the system microcontroller.
The fully assembled 9 digit display will have a width of 80cm. Perfect as a slot track accessory… large and retro ;)
c
The PCB backplanes correctly fit the 4inch 7 seven segment displays.
The dual voltage regulator circuits function correctly - the multi-digit display is powered by a 15V Hornby PSU. This is regulated down to 12V for the display common anodes and it is further regulated down to 5V for the control logic. All now functioning correctly.
Also, the optically isolated input correctly reads the three input signals (Serial data, serial clock and Latch). This consists of a correctly biased four channel ACSL6400 opto-isolator followed by signal inversion using a 74HC04. All working nicely.
Next task is to assemble all the required modules i.e. 2 x white digits, 5 x red digits and 2 x green digits.
Then the final stage: connecting the display to the track sensors and the system microcontroller.
The fully assembled 9 digit display will have a width of 80cm. Perfect as a slot track accessory… large and retro ;)
c
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