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I have been in the process of remaking Ben Eater's 8-bit-computer, and have a few questions. I got to the part where the clock, which consists of 3x 555 timer, is connected with logic gates. However, even after testing every IC and ensuring it works, I do not get the desired output.

Pin 3 of the astable one is connected to pin 1 of the AND gate. Pin 3 of the astable one is connected to pin 2 of the AND gate, and also via an inverter to to pin 4 of the AND gate. Pin 3 of the monostable one is connected to pin 5 of the AND.

The only differences between my circuit and the one Ben Eater made are the following:

  1. The bistable 555 isn't controlled by a button, but by manually connecting either the trigger pin or the reset pin to VCC.
  2. The SN74LS32, which is sadly not available where I'm from, has been replaced by the 74HC32, since I'm new to electronics I'm not quite sure if this is a problem. Again, all of the ICs work fine and everything is connected as in the tutorial.

Thanks in advance! that's Ben Eater's circuit

That's my circuit

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    \$\begingroup\$ Please add a proper schematic. Also describe what you mean with not getting the desired output (while according to you, all ICs work fine). \$\endgroup\$
    – StarCat
    Commented Sep 23, 2023 at 7:54
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    \$\begingroup\$ Sorry, but we don't know what that bunch of chips and wires should look like and do to get desired output and what it does instead when you say you don't get the desired output. Is there schematics? There is no piece of info to determine what is correct and what is wrong. Also, LS and HC chips may not be interchangeable due to their differences. There are no bypass caps either on the chips. \$\endgroup\$
    – Justme
    Commented Sep 23, 2023 at 7:55
  • \$\begingroup\$ youtu.be/SmQ5K7UQPMM?si=3jjQ-CstkU3rumVU Here around minute 9 is what the circuit should do. However, my LED doesn't turn on regardless of the 555 outputs. Sorry for not providing enough info. \$\endgroup\$
    – lukasm06
    Commented Sep 23, 2023 at 9:14
  • \$\begingroup\$ This may be of use: electronics.stackexchange.com/questions/572431/… \$\endgroup\$
    – hacktastical
    Commented Sep 23, 2023 at 9:17
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    \$\begingroup\$ Note that few people here will watch links to videos. I don't want to watch a ten minute video for something that can be described in a few sentences and a few pictures. \$\endgroup\$
    – Mattman944
    Commented Sep 23, 2023 at 14:05

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