hi every body , my name is hana and i need help to interface an RC transmitter circuit to the PC through LPT.
i tried the following method:
i removed the switches of the transmitter and replaced them with 2N2222 transistor where i connected the pin of the transmiiter IC "e.g back command pin" to the collector, and i connected the emitter to the ground of the circuit and LPT ,and finally i connected the base to D0 of the " LPT pin".
when i wrote the program for the interfaced circuit it worked well , when i send 5v to the transistor it provides an active low signal to the desired pin of the TX IC , and when i send 0v to the transistor it provides 1.44 v to the pin connected.
the problem is that the receiver doesn't respond to the TX after that interfacing.
but when i use the switches it works well.
sorry i know that i wrote to much details but i really need help so plz if anyone knows where i went wrong ?.
or a better way for interfacing? plz tell me, and don't hold ur information
waiting for ur answers and thanx in advance..
dally_nor2@yahoo.com
i tried the following method:
i removed the switches of the transmitter and replaced them with 2N2222 transistor where i connected the pin of the transmiiter IC "e.g back command pin" to the collector, and i connected the emitter to the ground of the circuit and LPT ,and finally i connected the base to D0 of the " LPT pin".
when i wrote the program for the interfaced circuit it worked well , when i send 5v to the transistor it provides an active low signal to the desired pin of the TX IC , and when i send 0v to the transistor it provides 1.44 v to the pin connected.
the problem is that the receiver doesn't respond to the TX after that interfacing.
but when i use the switches it works well.
sorry i know that i wrote to much details but i really need help so plz if anyone knows where i went wrong ?.
or a better way for interfacing? plz tell me, and don't hold ur information
waiting for ur answers and thanx in advance..
dally_nor2@yahoo.com