Turnpike blinking for 2 diodes

Forum 2005-2010 (read only) General Exhibition
1

My turnpike blinking for 2 diodes. This is a simple example of common-emitter scheme.

2

Code is from Blink example http://arduino.cc/en/Tutorial/Blink.

3

This is an example of using 74LS90 pulse counter. When user pressing the button, counter value is increasing. Arduino sends counter value to LS90 through digital output 12 as pulse sequence, LS90 counts pulses and lights counter value as 4-bit binary code.

Notice. Since LS90 counts pulses from 1 to 10 only, it can't be used for values from 0x0A to 0x0F.

Scheme:

Code:

http://sites.google.com/site/vanyambauseslinux/home/fajlovyj-menedzer/k555ie2_1.pde

4

Code is from Blink example http://arduino.cc/en/Tutorial/Blink.

Scheme:

Photo: