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—en:hardware:irda_module [2021/08/26 06:59] (current) – created - external edit 127.0.0.1
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 +{=hardware=}
 +====== Irda Module project ======
 +
 +If like me, you can't buy an IrDA module for your mother board, here you can find a simple circuit to build your own, hand made module.
 +
 +===== Schematic =====
 +
 +{{:en:hardware:myirda.gif?185|Electronic Circuit}}\\
 +Click on the schematic to zoom in!!!!
 +Now it can reach distances up to 35-40 cm!!! (wow!!!) :-)
 +
 +===== Bill of material =====
 +
 +^ Component ^Value         ^
 +| R1     | 1K Ohm 1/4W  |
 +| R2     | 100 Ohm 1/4W |
 +| R3     | 220 Ohm 1/4W |
 +| R4     | 10K Ohm 1/4W |
 +| R5     | 10K Ohm 1/4W |
 +| R6     | 220 Ohm 1/4W |
 +| R7     | 10K Ohm 1/4W |
 +| R8     | 10K Ohm 1/4W |
 +| R9     | 470 Ohm 1/4W |
 +| R10 (optional) |19K Ohm 1/4W |
 +| D1     | OP131 (or compatible IR LED) |
 +| D2     | Green LED(used to monitor transmission) |
 +| D3     | Green LED (used to monitor reception) |
 +| T1     | 2N2222 (NPN) |
 +| T2     | 2N2222 (NPN) |
 +| T3        | OP845 (or compatible phototransistor NPN |
 +| T4        | 2N2222 (NPN) |
 +| T5        | 2N2222 (NPN) |
 +| T6        | 2N2222 (NPN) |
 +| IC1       | 74LS14       |
 +
 +NB: The Base of T3 must be leaved disconnected to increase the gain)
 +
 +===== Prototipe photos =====
 +
 +{{:en:hardware:front.jpg|Front}} {{:en:hardware:back.jpg|Back}}\\
 +//Here is 2 poor images of my prototype//
 +
 +===== Schematic =====
 +
 +If you want the original schematic, created with Arianna Draft, you can download ib by clicking 
 +{{:en:hardware:myirda.sht|HERE}} (**{{dlcounter>file?en:hardware:myirda.sht}} ** downloads).
 +
 +
 +===== Notes =====
 +
 +The circuit I developed, must be connected to the connector present on Pentium(tm) Mainbord TX and later.
 +
 +Since the connector's pinout may change, you have to looking for correct pinout by reading your Mainboard user manual.
 +
 +If your circuit can transmit, but doesn't receive, put a resistor of 10K Ohm between Vcc and RX. Some Mainboard do not have an internal pull up resistor.
 +
 +If you want to use this circuit with Nokia Data Suite or another communication softwares, make sure you configured your IrDA port in Full Duplex mode.\\
 +Some BIOSes use other configuration options, like SIR or other.\\
 +Pay attention to choose the SIR mode (if available).
 +
 +NB: I take no responsability for damages my circuit may cause.
 +
 +PS: After IrDA upgrade, my PC works as usually, or better :-), but I risked damaging my friend's PC with a not well insulated circuit 
  

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