forumlicker007
New Member
Mike, that was a good one
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The headphone in my receiver circuit connects from the negative wire of the 470uF output coupling capacitor to 0V. If the headphone is made for two ears and each is 32 ohms or more then connect them in parallel. If they are each 8 ohms then connect them in series but with the correct phase.hello sir,
i have all the components with me, and i fabricated them on the bread board but i am not able to understand the connection of headphone on the breadboard.pls help me?????
Mike is too far away for you to use him and you are too young for him.someone suggested me to use a mike as input, would it be correct to use a mike????????
We hope you don't mind that we are teasing you.i also meant to say a microphone, it was just a spelling mistake..
We hope you don't mind that we are teasing you..
i might be nice???Because you might be nice
220nF film capacitor is not available? What to do????
It should be much farther.pls tell me what is the range for this circuit, since the ir leds that i used can work only upto 3 inch, how to increase the range????????
Hi Nice,
It is easy to use the LM386 audio amplifier IC to drive a power transistor that drives two IR LEDs in series with amplitude modulation. A 9V alkaline battery will become weak in about 10 hours.
What country are you in?
If you made the circuits that use an LM386 amplifier IC in the transmitter and receiver then the range can be increased by adding more BD139 transistors with IR LEDs and 120 ohm resistors. Also the range can be increased by adding a preamp transistor to the input of the LM386 IC in the receiver.hiii i'm new to these forum please tell me how to increase the range of infrared cordless headphone
i have done the project using ur circuit it is working but the range is only 1 metre how can i increase the range to atleast 4 metres