i used LDR for light detection..is work in night only & only senses torch light only….i required to sense sun light…so what i use in place of LDR…reply
hello… can you kindly tell me how to convert this dark detector circuit into light detector circuit… which part and components that i need to change?? tq
Just interchange the LDR and the variable resistor that is connected in series and trigger input is connected between them.ie interchange the ldr with 100k variable resistor.
here i have interfaced the relay parallel to the led and 220 ohm resistance ……..relay gets activated but do not get turned off after taking my finger off…….plzz help
April 9, 2012 at 11:21 am
mandeep
i used LDR for light detection..is work in night only & only senses torch light only….i required to sense sun light…so what i use in place of LDR…reply
June 4, 2012 at 12:54 pm
Tittu
Here you can use this Tool to find
the time out
The Timeout Of Monostable Multivibrator Calculator
July 4, 2012 at 8:24 am
Pratik Shrestha
this really does work but the time we set is not constant on every attempt…sometimes it glows for very long time..can u kindly tell me why is that so?
August 11, 2012 at 5:49 pm
Sanjay adhikari
How touch sensor works?
November 26, 2012 at 9:14 am
taliez
can i use a PIR sensor instead of an LDR? (Dark sensor using 555(based on Monostable mode))
November 27, 2012 at 9:19 am
Sagar Sapkota
no
April 12, 2013 at 10:20 am
Hassan
Can u tell me the voltage rating of 100 micro farad capacitor intouch sensor
May 9, 2013 at 11:01 am
Patrick Chung
This circuit can be simulated on:
http://www.cirvirlab.com/simulation/ne555_monostable_multivibrator_online.php
in order to see waveforms and influence of R and C value as well as time position of triggering signal.
May 12, 2013 at 1:17 pm
aswad
hello… can you kindly tell me how to convert this dark detector circuit into light detector circuit… which part and components that i need to change?? tq
October 31, 2013 at 7:51 pm
Ajay
Just interchange the LDR and the variable resistor that is connected in series and trigger input is connected between them.ie interchange the ldr with 100k variable resistor.
July 13, 2013 at 11:39 am
jemt
i need to let the led lit for 2 seconds
.plz suggest the r1 and c1
August 9, 2013 at 10:23 am
nanagee
i want to construct a bulb by using sensor
November 24, 2013 at 1:55 pm
Heena
What program you are using to draw schematic
April 10, 2014 at 3:05 am
nike air max bw
Mode of NE555- Monostable | BUILD CIRCUIT
nike air max bw http://www.elchaletsuizo.es/zapatillas/nike-air-max-bw.html
June 4, 2016 at 11:46 am
PlasticBag
I want to use 4.8 V light bulb. What do I have to change in the circuit?
Thanks
July 8, 2016 at 8:13 pm
dhruv
here i have interfaced the relay parallel to the led and 220 ohm resistance ……..relay gets activated but do not get turned off after taking my finger off…….plzz help