CD4029 is a presettable binary/decade up and down counter chip. Scoreduino app has a feature to control the CD4029 based up and down counter module. You can connect the CD4029 counter module to Arduino and send up and down signals via Bluetooth. It is the most basic and simplest up and down counter for Arduino enthusiasts.
It works with normal Arduino. It also works with NE555 timer or flashing LED.