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I wnat to use 8 IR sensors (4 on front of vest, 2 on back and 2 on headband like lazertag vest) that when each of sensors hitted by IR, turn on a led. I don't want to use any microcontroller so a simple circuit is what I want. I can achieve this by one IR reciever but I want to use 8 sensor. Help me please.enter image description here

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closed as unclear what you're asking by Marcus Müller, Chris Stratton, Maple, diverger, Finbarr Aug 29 '18 at 14:18

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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    \$\begingroup\$ You should probably use demodulating IR detectors and a modulated source. If your detectors are open-collector (ie, require a pullup resistor) you can probably wire-OR them (connect all the outputs together with one pullup resistor). You'll then likely need a pulse-stretcher circuit. 555 ones may be easiest to find though the power consumption is a bit high. \$\endgroup\$ – Chris Stratton Aug 26 '18 at 16:21
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    \$\begingroup\$ Welcome to EE.SE. Can you add a schematic of the circuit you have that works? Please capitalise your words properly. \$\endgroup\$ – Transistor Aug 26 '18 at 16:32
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    \$\begingroup\$ If you have one circuit working then what's stopping you making eight? \$\endgroup\$ – Andy aka Aug 26 '18 at 16:37
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    \$\begingroup\$ Please, clarify - do you want one LED light up when all sensors were hit, one LED light up when either sensor is hit, or one LED per each sensor? The question seems to describe first, but the title implies second. \$\endgroup\$ – Maple Aug 26 '18 at 17:57
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    \$\begingroup\$ Possible duplicate of How to use multiple LDR to trigger a led? . You seem to have two questions aimed at the same underlying need, so please explain what you are actually trying to accomplish. It's relatively unlikely that either approach, or any approach using umodulated sources will work well in practice. \$\endgroup\$ – Chris Stratton Aug 26 '18 at 18:45
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Sorry, but your schematic can be considered only to be a concept drawing without any actual circuit details. As a drawing of an electronic circuit it's never going to work.

I bet you are not gaming in darkness. In daylight or under lamps there's plenty of other IR radiation which your circuit must be able to ignore. You need a recognizable modulation in the transmitted IR. Your receiver must be able to filter what IR radiation detectors (photodiodes or phototransistors) output, recognize the right code and trigger the action that is wanted. Detecting only the IR radiation strength needs full darkness.

I recommend you to search for IR remote contol receiving ICs such as TDA8160 by SGS-Thomson. It can have several IR photodiodes in parallel. It detects no special complex codes, only pulses which have high enough repetition frequency.

A little more sophisticated signal is used in IRM-2638T by Everlight. It needs pulses which have the right frequency. The sensor and pulse frequency detection circuit are integrated, so you need many of them for one person. But the outputs are easily combined.

If you search a little, you'll find more.

BTW. Your schematic shows that you need a competent partner for circuit details and tests.

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    \$\begingroup\$ Thanks guys for all comments. I decided to use a remote control as gun and TSOP1837 for IR reciever on vest and headband \$\endgroup\$ – user7196028 Aug 27 '18 at 8:01

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