NEW PROJECT: EASY STEPS MAKE INFRARED BASED OBJECT COUNTER

An up counter simply counts from 0 to 9. We can use this circuit to make digital object counter. This circuit can also be used to make a digital clock. Click here to read about ‘How digital Clock works?’ We need following components for making an up counter.

1. 555- configured in astable mode
2. 7490- decade counter- Click here to get the datasheet
3. 7447- BCD to seven segment display- Click here to get the datasheet.
4. Seven segment display- Common Anode

Here, CC-Common Cathode and CA-Common Anode. 6. Resistors- see the schematic 7. Capacitor- see the schematic 8. LED 9. Power supply The 555-astable multivibrator gives pulse to 7490, for each pulse it outputs 4 bits which are interpreted by 7447 and displayed as numbers on seven segment display. Click here to read how 7490 IC outputs 4 bits.

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Counter with different numbers:

You don't need to make changes on 555 astable timer and 7447. You just need to modify connections on pins 2,3,6 and7 of 7940. Count 0 to 1 - Short pins 2 and 9 i.e. connect pin 2 to 9. - Remove connection of pin 3. - Connect pins 6 and 7 to negative terminal of battery or ground. Count 0 to 2 - Short pins 2 and 9 i.e. connect pin 2 to 9. - Connect pin 3 to 12. - Connect pins 6 and 7 to negative terminal of battery or ground. Count 0 to 3 - Connect pin 2 to 8. - Remove connection of pin 3. - Connect pins 6 and 7 to negative terminal of battery or ground. Count 0 to 4 - Connect pin 3 to 8. - Connect pin 2 to 12. - Connect pins 6 and 7 to negative terminal of battery or ground. Count 0 to 5 - Connect pin 2 to 9. - Connect pin 3 to 8. - Connect pins 6 and 7 to negative terminal of battery or ground. Count 0 to 6 - Find out yourself Count 0 to 7 - Connect pins 2 and 3 to 11. - Connect pins 6 and 7 to negative terminal of battery or ground. Count 0 to 8 - Connect pin 2 to 11. - Connect pin 3 to 12. - Connect pins 6 and 7 to negative terminal of battery or ground. Count 0 to 9 - Connect 2,3,6 and 7 to ground. For resetting counter Pin 2 and 3 should be momentarily connected to +ve terminal. You can use a push-to-on switch.   [products ids="18978" skus="BC-3014A"]

Check out all the counters

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