Easy way to find a digital counter is up/down counter. - YouTube
Up/Down Counter
Amazon.com: BTBSIGN LED Up/Down Counter with Switch Box & Remote Red 4'' LED Display (3Digits) : Office Products
Synchronous Counters | Sequential Circuits | Electronics Textbook
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Programmable Counter Up/Down - Instructables
Programmable and Up Down Counter - Engineering Projects
Amazon.com: BTBSIGN LED Up/Down Counter with Switch Box & Remote Red 4'' LED Display (3Digits) : Office Products
Amazon.com: BTBSIGN LED Up/Down Counter with Switch Box & Remote Red 4'' LED Display (3Digits) : Office Products
Synchronous Counters | Sequential Circuits | Electronics Textbook
Amazon.com: BTBSIGN LED Up/Down Counter with Switch Box & Remote Red 4'' LED Display (3Digits) : Office Products
Up/Down Counter : Circuit, Working, IC74193 & Its Applications
Amazon.com: BTBSIGN LED Up/Down Counter with Switch Box & Remote Red 4'' LED Display (3Digits) : Office Products
Amazon.com: BTBSIGN LED Up/Down Counter with Switch Box & Remote Red 4'' LED Display (3Digits) : Office Products
Amazon.com: BTBSIGN LED Up/Down Counter with Switch Box & Remote Red 4'' LED Display (3Digits) : Office Products
Up/Down Counter
Up/Down Counter
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Synchronous Up/Down Counter (JK flipflops)
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