First Circuits

These are my very first circuits, that I devised.

This one will shift a single lit LED in every clock pulse. It uses a HCF4017 Decade Counter, and NE555 in astable mode as a clock.

schematic_led_shift

This one will produce a train of lit LEDs. It uses two NE555 in astable mode, on as a serial data input, and other as a clock, and a 74HC595 Shift Register.

schematic_led_train

The Train length sometimes is apparently random, because I didn’t fine tune the timing of the data input, and the shift clock.

I tested these circuits on breadboard, and it worked fine.

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