Today I will show to how to make Contador 74LS90 en BCD

All the material you need for this project:

Here are the steps of this project:

Show results：

The product links as below:

IC chips: https://www.utsource.net/category/ele...

Modules: https://www.utsource.net/Modules?sour...

Passive components: https://www.utsource.net/PassiveDevic...

Sensors: https://www.utsource.net/home/sensors...

LED lightings: https://www.utsource.net/category/led...

More electronic components you may be interested:

SN74LS08N https://www.utsource.net/itm/p/1748678.html
LM2901 https://www.utsource.net/itm/p/11565262.html
TLP557 https://www.utsource.net/itm/p/498911.html
FGPF4536 https://www.utsource.net/itm/p/11530833.html
MMBT3904 https://www.utsource.net/itm/p/11211648.html

For more details, pls check the video on youtube: