So, it's been two months since I encountered this problem and temporarily stopped work on my SCHM8B1001 CPU project (contains files to original schematics and instruction set at bottom) as I was busy with a lot of school work.
According to what I remember, after listening to advice for star configuration powering, and I made a system where it would be possible for each breadboard to not be connected to each other but it would still be possible to send individual power connections to each of the 21 breadboards from one relative source. To the left, I configured some form of a "power connection hub" that isn't directly connected to the power rails, and from each meeting hub I would send multiple leads out to the breadboards in such star configuration.
But for some unknown reason, when I power one isolated breadboard alone, the voltage is fine at a steady 5.01 V approx., perhaps losing some of the original 5.18 V in a resistance voltage drop. But every time I add power to another isolated breadboard, the voltage of each of the isolated boards drops by .10 or so volts. (one reading was around 4.8 to 4.9). Then as I added more and more boards to the configuration, the overall voltage for each of the boards would drop some more below 4.7 to 4.5 volts. I didn't expect this since power supply to chip power pin resistance was supposed to be minimized with the star configuration, and the entire configuration is in parallel.
So how would I fix this problem, or what else can I do to ensure that each board is receiving the necessary 5 volts? This wouldn't be too much of a problem if all of my chips were 74HC series, but about 20 to 30 of them are 74LS since I couldn't find the 74HC equivalent (mainly 74LS126 and 74LS191 chips and two 74181s). I've heard about using bypass capacitors to "lower inductance" or something, but I'm not certain about its applications and I need some sense of the exact effects to expect from using these solutions.
Thank you.
According to what I remember, after listening to advice for star configuration powering, and I made a system where it would be possible for each breadboard to not be connected to each other but it would still be possible to send individual power connections to each of the 21 breadboards from one relative source. To the left, I configured some form of a "power connection hub" that isn't directly connected to the power rails, and from each meeting hub I would send multiple leads out to the breadboards in such star configuration.
But for some unknown reason, when I power one isolated breadboard alone, the voltage is fine at a steady 5.01 V approx., perhaps losing some of the original 5.18 V in a resistance voltage drop. But every time I add power to another isolated breadboard, the voltage of each of the isolated boards drops by .10 or so volts. (one reading was around 4.8 to 4.9). Then as I added more and more boards to the configuration, the overall voltage for each of the boards would drop some more below 4.7 to 4.5 volts. I didn't expect this since power supply to chip power pin resistance was supposed to be minimized with the star configuration, and the entire configuration is in parallel.
So how would I fix this problem, or what else can I do to ensure that each board is receiving the necessary 5 volts? This wouldn't be too much of a problem if all of my chips were 74HC series, but about 20 to 30 of them are 74LS since I couldn't find the 74HC equivalent (mainly 74LS126 and 74LS191 chips and two 74181s). I've heard about using bypass capacitors to "lower inductance" or something, but I'm not certain about its applications and I need some sense of the exact effects to expect from using these solutions.
Thank you.