# 2-Bit Synchronous Counter ## Description Simple simulatable 2-bit synchronous JK up counter for verifying the 00→01→10→11 sequence. ## Project Details - **Owner:** gustavochura0 - **Created:** 7/2/2026 - **Last Updated:** 7/2/2026 - **Visibility:** Public ## Key Components ### D1 — [LED-0805-No-Silkscreen](https://www.flux.ai/vasy_skral/led-0805-no-silkscreen~lth.md) - Role: Q0 LED indicator - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### D2 — [LED-0805-No-Silkscreen](https://www.flux.ai/vasy_skral/led-0805-no-silkscreen~lth.md) - Part Type: LED - Role: Q1 LED indicator **Pins:** - A [pin 2] - K [pin 1] ### U1 — [SN74LS109AN](https://www.flux.ai/adrian95/sn74ls109an~vbi.md) - Role: Dual JK flip-flop: U1A=Q0 toggles every CLK, U1B=Q1 toggles when Q0=1 - Part Type: Integrated Circuit - Datasheet URL: https://www.ti.com/lit/ds/symlink/sn74ls109a.pdf - Manufacturer Part Number: SN74LS109AN - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Texas Instruments **Pins:** - 1~CLR [pin 1] - 1~K [pin 3] - 1~PRE [pin 5] - 1~Q [pin 7] - 1CLK [pin 4] - 1J [pin 2] - 1Q [pin 6] - 2~CLR [pin 15] - 2~K [pin 13] - 2~PRE [pin 11] - 2~Q [pin 9] - 2CLK [pin 12] - 2J [pin 14] - 2Q [pin 10] - GND [pin 8] - VCC [pin 16] ### U2 — [SN74LS08N](https://www.flux.ai/adrian95/sn74ls08n~m8s.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.ti.com/lit/ds/symlink/sn74ls08.pdf - Manufacturer Name: Texas Instruments - Part Type: Integrated Circuit - Manufacturer Part Number: SN74LS08N - Role: AND gate used as Q1 toggle enable: Q0 AND HIGH **Pins:** - 1A [pin 1] - 1B [pin 2] - 1Y [pin 3] - 2A [pin 4] - 2B [pin 5] - 2Y [pin 6] - 3A [pin 9] - 3B [pin 10] - 3Y [pin 8] - 4A [pin 12] - 4B [pin 13] - 4Y [pin 11] - GND [pin 7] - VCC [pin 14] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/gustavochura0/2-bit-synchronous-counter~0q](https://www.flux.ai/gustavochura0/2-bit-synchronous-counter~0q).* --- *Generated from [https://www.flux.ai/gustavochura0/2-bit-synchronous-counter~0q](https://www.flux.ai/gustavochura0/2-bit-synchronous-counter~0q)*