74LS193 4Bit Binary Up/Down Counter - Electronic Circuits Projects Diagrams Free

ebonybeaver · 10th December 2003, 07:02 PM

I am having difficulty making the 74LS193 automatically count up and then recycle and count back down. That is 0000 - 1111-0000. I wired the circuit to make it count up. I had to switch the wires of the clock and the high between pins 4 and 5 to make it count down. Could you please let me know what way to wire it to automatically count up and then recycle back down. I need to know what pins to put together. I read your post about cascading them together. However I didn't really understand what you meant. I didn't know what to do with the inputs or whether to take the outputs into the inputs of the next chip. Please help me understand. Thanks in Advance

nettron1000 · 10th December 2003, 10:06 PM

I built a circuit awhile ago similar to what you are discribing. You have to use the carry and borrow output pins (12/13) connected to a gated flip-flop for up/down sequecial counting.
Heres a link to a scanned copy of my circuit with a breif disciption;

http://www.geocities.com/nettron1000...DFLASHER1.html

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10th December 2003, 07:02 PM	(permalink)
ebonybeaver	74LS193 4Bit Binary Up/Down Counter I am having difficulty making the 74LS193 automatically count up and then recycle and count back down. That is 0000 - 1111-0000. I wired the circuit to make it count up. I had to switch the wires of the clock and the high between pins 4 and 5 to make it count down. Could you please let me know what way to wire it to automatically count up and then recycle back down. I need to know what pins to put together. I read your post about cascading them together. However I didn't really understand what you meant. I didn't know what to do with the inputs or whether to take the outputs into the inputs of the next chip. Please help me understand. Thanks in Advance

10th December 2003, 10:06 PM	(permalink)
nettron1000	I built a circuit awhile ago similar to what you are discribing. You have to use the carry and borrow output pins (12/13) connected to a gated flip-flop for up/down sequecial counting. Heres a link to a scanned copy of my circuit with a breif disciption; http://www.geocities.com/nettron1000...DFLASHER1.html __________________ Two roads diverged into a woods...i took the one less travelled by. R. Frost.