Nov 24 in Basic Electronics, LDR Engineering
Written by: Sagar
NEW PROJECT: EASY_STEPS_MAKE_INFRARED_BASED_OBJECT_COUNTER
We need following components for making an object counter
- 555- configured in monostable mode(automatic dark sensor using 555)
- 555- configured in astable mode
- 7490- decade counter- Click here to get the datasheet
- 7447- BCD to seven segment display- Click here to get the datasheet.
- Seven segment display- Common Anode
Here, CC-Common Cathode and CA-Common Anode.
6. Resistors- see the schematic
7. Capacitors- see the schematic
8. Light dependent resistor (LDR)
9. LED
10. Power supply
There are basically three modules in object counter:
NEW PROJECT: EASY_STEPS_MAKE_INFRARED_BASED_OBJECT_COUNTER
555 timer configured in monostable mode is a simple automatic dark sensor circuit that gives output when light falling on LDR is blocked. Pin 3 of monostable circuit has been connected to pin 4 of astable timer. When monostable circuit generates output, astable mode timer starts giving pulses to the counter module.
Frequency for counter module is set up using R4, R3 and C2.
7490 acts as a decade counter and 7447 uses the output of 7490 to display numbers on seven segment display.
This circuit counts from 0 to 9.
Click here to read about ‘How digital Clock works?’
OUTPUT: If you block light falling on LDR, the number on seven segment display will increase.
NEW PROJECT: EASY_STEPS_MAKE_INFRARED_BASED_OBJECT_COUNTER
Click here to read about ‘How digital Clock works?’
NEW PROJECT: EASY_STEPS_MAKE_INFRARED_BASED_OBJECT_COUNTER
16 Comments for: Digital Object Counter using LDR and digital IC
we done dis project, tmmrw is my presentation, lets see wat will happen
we done the project, nd tmmrw is my presentation.. lets see wat wil happen…..
we done the project..but without the effect of ldr the count is incrementing…
we done the project..but without the effect of ldr the count is incrementing….
what is the rating of ldr to be used?
i want dis ckt, so than u,vry much 4 dis ckt & video…………………<3
I was made this projects. My soldering is also propered. Led 2 is blinking .and led1 is lighting. There are work my project. But there are not any effect of LDR on display. .display was automatic run. . So, what i do or anything wrong in project . .say me friends please. .it’s urgent. . .
I was made this projects. My soldering is also propered. Led 2 is blinking .and led1 is lighting. There are work my project. But there are not any effect of LDR on display. .display was automatic run. . So, what i do or anything wrong in project . .say me friends please. .it’s urgent.
i did proper connections in the circuit..my led1 glows throughout the procedure..led2 blinks once at the starting..decade counter started but its not increasing the count when m blocking light from ldr.can anyone help me?
You must not have not done soldering properly.Check it once more time Akshada
i connected the circuit according to the circuit diagram and although the led 1 is lighting and led 2 is blinking d 7 segment display is not working.can anyone tell me where i could have gone wrong?
I complete my project of object counter using resistors ,LDR,seven segment display etc.the project is very easy to understand and making methods also easy.
thank u so much for this vedio and information..this is my next project
i am doing the simple project on digital logic as the object counter.
isn’t there another easy way to design the circuit for object counter using transistor,decay counter and LDR?
thnk u …
i want this circuit for college exibition work… i searched the for more but i can’t get now only i got it thnk u once again …
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