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| Electronic Projects A collection of small electronic circuits and projects you can build. |
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| | Thread Tools | Display Modes |
9th August 2006, 12:13 PM
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| Experienced Member      |  Just conect the LED to the jack whitha restor and you have your tramnsiter
__________________ Il give you shocking experience. |
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18th September 2006, 11:07 PM
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| New Member | i think the qwestion was post a circuit... i would like one too... even a note on a napkin will do (i hope i dont regret that...) thanx in advanced |
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21st September 2006, 04:49 AM
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| Experienced Member | Do you know how to conect a LED to a batery? This is the same exsept the batery is a click in jack
__________________ Il give you shocking experience. |
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21st September 2006, 08:56 AM
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| Experienced Member  | what is a restor? I couldn't find its definition from hyperdictionary.com.. Something to ask about the 3.5mm jack. As i know, there are 3 terminals at the jack, can i know which one represent what?
__________________ Superman Returns.. http://www.supermanhomepage.com/imag...an-returns.gif My friend created this account for me.. LOL http://bananasiong.myminicity.com oh.. somemore  http://bananasiong.myminicity.com/env |
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21st September 2006, 10:12 AM
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| Experienced Member | Analog audio has a stadard of 2V +/- output.So you need a resistor that will let trough about 20mA whith a aproximete half volt drop. Ohoms law says 25Ohm a comon resistor is 22Ohm so use that. Google wil find you audio jack pinouts.And wikipedia wil give you lots of info about resistors and IR LEDs.
__________________ Il give you shocking experience. |
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12th November 2006, 09:58 AM
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| New Member   | do you have a circuit for the sound to IR converter? and the Phototransistor circuit needed to input the IR signals to the PC. Thank You |
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3rd December 2006, 12:03 AM
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| New Member |  Schematic Plese begging for a schematic of the said project. Thank You. |
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3rd December 2006, 03:42 PM
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| Experienced Member   | Plz I'm so pathetic I can't think for myself.  |
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4th December 2006, 02:39 AM
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| New Member |  Circuit Diagram tried makin the transmitter, with that LED and the 220ohm resister, used a common audio jack. the thing is how do i make that phototransistor circuit for the input of the signal> ? |
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4th January 2007, 01:25 PM
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| New Member | Circuit Diagram Anyone, please post a circuit daigram of the IR transmitter and recorder. Thank You |
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5th January 2007, 11:09 AM
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| Experienced Member | I've tried 2 IR's with a 220R resistor - can't seem to get it to work. Also can't seem to find the IR device on the griffin site - do they still make it? |
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11th March 2007, 08:22 AM
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| New Member | got the receiver running and recording. the problem now's the transmitter. seem's that it can't get enough juice from the audio output of the headphones socket. using a digicam, can't see any light(digicams can see IR) |
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12th March 2007, 02:22 AM
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| Experienced Member  | A headphones output is not powerful enough to light an LED. You need to light the LED with its resistor with a DC power supply or battery then modulate the DC with the audio from the headphones jack capacitor-coupled to it.
__________________ Uncle $crooge |
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13th March 2007, 11:40 AM
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| New Member | i see, i see. that's what i've been tryin to do. haven't got it right yet though. a little help on a diagram. thanks |
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13th March 2007, 12:38 PM
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| Experienced Member | To calculate the correct value of a current-limiting resistor for the IR LED, we need to know its forward voltage at 20mA and its max continuous current ratings. We also need to know the supply voltage of the transmitter and which type of battery it uses.
__________________ Uncle $crooge |
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Linear Mode
