With possible mixed families of IC's I checked drive of 74HCXX at 5V with about same result as with 6V.
I believe a 5V supply should work fine for all 3 parts, & seem a bit more available like All Electronics CAT No PS-544, 5V @ 4A.
You are much better with CMOS equivalents. 5V is way too limiting.
I've been busy, so I have not had a lot of time to spend on this thread, other that the design on the 100 LED seq, which is ongoing.
I thought lednoob might want to practice dead bug wiring with part of CHASER-256 LED's as he already has the IC's, maybe just use 2- 74154's + a 74154 for control. Estimating green LED Vf of 2.5V, the current limiting resistor, lower right would be about 200 ohms with VCC of 5 V. As all LED anodes are common it would be a place to inject pulsing to the string.
You will have to make some changes. I am designing a build in oscillator to make the circuit "move", which is the 555. Are you wanting the fading to also go with the sequenced LEDs? In other words, the whole display, all the LEDs, fade simultaneously? It can be done that way, but there will be several changes to the base design of what I am doing.
You are much better with CMOS equivalents. 5V is way too limiting.
I've been busy, so I have not had a lot of time to spend on this thread, other that the design on the 100 LED seq, which is ongoing.
so I can add your 256 LED schematic to this controller
would love to see what your tweaks are when doneThat is my plan. I'm well on the way to implementing the 100 sequencer because it is simpler.
I will tweak the 256 counter a few times to optimize the design, but it would work as is.
That is my plan. I'm well on the way to implementing the 100 sequencer because it is simpler.
I will tweak the 256 counter a few times to optimize the design, but it would work as is.
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