help with a toggled IR proximity sensor

[urkidn]

thank you so much and with the cap's u just wire them in parallel as a peck detector?

 

[ericgibbs]

thank you so much and with the cap's u just wire them in parallel as a peck detector?

hi,
I will add the decoupling caps to the circuit and repost.

 

[ericgibbs]

hi,
I have added the caps and pin numbers.
I could not replace the circuit in that earlier post, as I cannot 'Go Advanced' from an Editing reply.

Look thru this circuit.

 

[urkidn]

thanks so much i'll let u know how i go when i make it and probs put it on youtube like my clapper

 

[rizwan33]

nice project.
but remember that ir is very sensitive to day light/yellow light

 

[urkidn]

so would that sun glass looking stuff they use on remotes and tv's to cover the ir sensors, would this defy this problem? my downlights there colour temp is 2700K witch is pritty much yellow light :S

 

[urkidn]

i've haft made it and just double checking the voltages and i get 5volts no hand , 4.85 volts hand in front right where i want it. what resisters do i have to change from 4.5v to 4.85V?

hi,
I have added the caps and pin numbers.
I could not replace the circuit in that earlier post, as I cannot 'Go Advanced' from an Editing reply.

Look thru this circuit.

 

[ericgibbs]

No changes should be required, I will recheck the circuit with these new values.
Have you made any changes to the Emitter/Detector layout, that has caused 4.5V to 4.85v difference.?

Have you checked the output of the LM393 & CD4013.???

EDIT:
This is the Sim with 5V and 4.85V

 

[urkidn]

nah theres no change i was just trying to get it as far away with my hand as possible with out it being to sensitive i did add a 5v reg coz i know how touchy op amps are

 

[ericgibbs]

nah theres no change i was just trying to get it as far away with my hand as possible with out it being to sensitive i did add a 5v reg coz i know how touchy op amps are

hi,
Its not a op amp configuration,
Its a set up as comparator.

The way the circuit is configured, it will compensate for moderate changes in ambient [back ground] lighting.

If you add a filter as someone suggested, dont use it over the emitter.

Lets know how it goes.

 

[rizwan33]

so would that sun glass looking stuff they use on remotes and tv's to cover the ir sensors, would this defy this problem? my downlights there colour temp is 2700K witch is pritty much yellow light :S

Well that will work fine

 

[urkidn]

hey man all wired up and its not toggling, i got like 1.7volts at the base of the transistor and even when u make it drop below 4.5v it still doesnt toggle on and off, idk what to do for fault finding. triple checked my wiring. the "comparator " has 12volts at pin 1 and yeah idk what to do :s

 

[ericgibbs]

[QUOTEhey man all wired up and its not toggling, i got like 1.7volts at the base of the transistor and even when u make it drop below 4.5v it still doesnt toggle on and off, idk what to do for fault finding. triple checked my wiring. the "comparator " has 12volts at pin 1 and yeah idk what to do :s ][/QUOTE]

If you have 1.7V at the Base of the transistor, it suggests that you have the transistor wired incorrectly, or the transistor is faulty.

 

[urkidn]

nah its the voltage coming from the 4013 then throw the 2k2 resister then to the transister

 

[urkidn]

it was working for a sec then... its really hard to get it working

 

[urkidn]

so yeah theres nothing wrong with it just it hates light in a shady area it works okish but yeah wouldnt really work in the practical way i would like it, theres way to much light :/ thanks for all your help Eric

 

[ericgibbs]

To increase the sensitivity increase R5 [10k] try a 22K or 47K.

Not sure what this means.??

nah its the voltage coming from the 4013 then throw the 2k2 resister then to the transister

 

[urkidn]

chage the ir sensor to a touch sensor

hey , i wana use your toggle circuit for something less problemy im not quite sure how to re arrange the comperetor but i want to keep the toggle part and replace the ir led and sensor with this.

To increase the sensitivity increase R5 [10k] try a 22K or 47K.

Not sure what this means.??

 

[urkidn]

would this work?

1st e tempt :s

Note that there is a resister at R1 i didnt see i didnt put 1 back there...

 

[urkidn]

touch switch V2

this mit be better?