How to use a 74HC595 Shift Register with a AVR ATtiny13

 by roznerd

Step 2: Hook it up on the breadboard

P1070890.JPG
595_schematic.jpg
Setting up the Circuit is pretty simple. It will take you about 10 minutes.

Place the ATiny13 and the 74HC595 near each other.
Hook up VCC and GND on both.
Put the 10K resistor from the ATtiny13 RESET pin to VCC
Put the LEDs in a row with the 470ohm resistors on the LED cathodes to GND.
Run Hook up wires from the LED anodes to the 595 outputs in order A-H.

Here's the important part:
Connect the ATtiny13 to the 74HC595 like this:
PB0 to Data Pin (pin14)
PB1 to Output Enable (pin13)
PB2 to Latch Clock (pin12)
PB3 to Shift Clock (pin11)
PB4 to Reset (pin10)

Also connect the Data Output (pin9) to GND since we aren't using it.

Take alook at the provided schematic. It's not beautiful but it will get the point across better than words.

The power supply shown in the schematic is pretty standard. You probably already have it setup. Just put the 100uF and 0.1uF caps across VCC to GND to smooth out any ripples.

Once you have it boarded up, hook up your programmer and go the the next step.

 
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