Guest mferolla Posted February 27, 2003 Report Share Posted February 27, 2003 Im going to use an IR device for my MidiBox64 and this IR is giving me a max output of 5.3 V does anybody know if this will damage the PIC or it will no work properly, and if so How can I solve it?!?!Thanxs , ths forum is helping me to clarifie all my doubts Quote Link to comment Share on other sites More sharing options...
jerash Posted February 28, 2003 Report Share Posted February 28, 2003 you should be able to fix it with the help of ... 2 resistors :)i'll try a simple scheme you probably know (common electronics)[pre] ______>Vin>--|__R1__|--------------------->Vout |R2|--------------------------------------->ground[/pre]correct me if i'm wrong but i think i remeber that :Vout = R2/R1 * VinVin is the output of your IR sensorVout goes to the PIC inputchoose correctly your resistor and you should go ok !RAF Quote Link to comment Share on other sites More sharing options...
Guest blafferen Posted March 1, 2003 Report Share Posted March 1, 2003 Hello mferollaI have just finished my first midibox. It is build for use with sensors. Until now it has 8 inputjacks on the top of the box. Each input has a voltage protection, the one that Thorsten has described in the section "midibox extensions". This should prevent voltages below -0.7 and above 5.7 to enter the pic. In each protection unit I have omitted the two 10k resistors, because with the two 10k there would be a bias voltage 2.5v. Meaning the inputs would only go from 2.5 to 5v.Considering Thorsten calls it a protection circuit, I should think that the pic can accept voltages inside -0.7 to 5.7volts, but Im a musician not a electrician so I would like to know to!!Bye Pelle Pelle Quote Link to comment Share on other sites More sharing options...
TK. Posted March 2, 2003 Report Share Posted March 2, 2003 Thats correct - the data sheet says: long-term maximum voltage 5.5V, absolute maximum voltage (before damage): 7.5VSo, you can use the IR sensors without the prodection diodes if you are sure that 5.5V are not exceeted.Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
Guest mferolla Posted March 2, 2003 Report Share Posted March 2, 2003 Thanks now I m more relax! mariano Quote Link to comment Share on other sites More sharing options...
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