Wiring a counter
- Adjust clock speed
- Connect a wire from the clock RotCLK to LED0.
- Adjust the speed of the clock down to about 1 blink per second.
- Divide the speed in half
- Get a 74LS93 counter chip
- connect power and ground and both resets to ground
- connect the clock to input A,
- wire output QA to LED 7
- What happens?
- Wire the counter
- Connect QA to input B
- Connect QB, QC and QD in order to LEDs 4,5 and 6
- Does it count from 0-15?
- Which is the most siginficant bit?
- What is the speed in Hz of each output if the clock speed is 1Hz?
- Add in a 7segment display using a 7447 or 7448 chip
- Connect the BCD converter chip to power and ground
- Wire the 4 outputs from the counter into the 4 inputs of the BCD converter
- Wire the 7 outputs from the converter to SegA1, B1, etc.
- Is the 7 segment display common anode or cathode on the board?
- Count in decimal
- Change the counter to reset when it reaches 10 to go back immediately to 0
- if output QA is a 1 and output QC is a 1 then the resets should be high.