[RJ45 network card to IR]

dear audioguru if it is not a crystall then wat is the 200mhz in the transmitting part of the circuit





plz relpy fast

[RJ45 network card to IR]

:)thx audioguru :) ,ya it is confusing ??? but i really want to make this circuit i need some help from u guyz
1- i found the 74hc series in my country ,is it ok to us them .
2- what is the range of this device .
3- i cant find the 200mhz crystall so i will try to use the frequency multipier with 50mhz.

thx for ur help

[RJ45 network card to IR]

hello everybody can anyone tell me what is going on i cant find where did u use the 9v in the first circuit ,and what is the filter in the circuit (is it the circle around the diode),and i only found the 74hc04 and 74hc08 ics.