Multisim| Stopwatch Timer Cascading 7 Segments 74ls190 74ls47

Stopwatch Timer Cascading 7 Segment Displays

Written by Larsha Johnson
12/19/2015

In this blog a stopwatch is simulated in Multisim and converted to a PCB layout via Ultiboard

Build of material:

1. Two 7 segment displays
2. Resistor packs (100 Ohms) *included in updated model
3. Two 74ls190 (up/down counters)
4. Two 74ls47 (BCD decoder)
5. 555 Timer (1MHz digital clock in Multisim)
6. One toggle switch (up/down)
7. 1 Tact push button switch (reset)

Snippet for drag and drop coming soon.

*Visit our Git page for free files. https://github.com/Bits4Bots