hello there...
some questions here.
1. I want to modify a transmitter for remote control to be connected to the parallel port of a computer. i am thinking of using a relay, so that when there is a 5V at the output pin of the parallel port, the relay will trigger the transmitter circuit. but what i heard is that there is not sufficient current coming out from the parallel port. is that true? if so, is there any solution?
2. i came across a circuit configuration yesterday, which is shown in the attachment. can some one explain.. the explanation i've heard seems to be a quite wierd.. just to confirm.
it is a circuit that uses serial port to provide input to a hex inverter. so the output of this circuit is to be input for the inverter IC.
thanks
some questions here.
1. I want to modify a transmitter for remote control to be connected to the parallel port of a computer. i am thinking of using a relay, so that when there is a 5V at the output pin of the parallel port, the relay will trigger the transmitter circuit. but what i heard is that there is not sufficient current coming out from the parallel port. is that true? if so, is there any solution?
2. i came across a circuit configuration yesterday, which is shown in the attachment. can some one explain.. the explanation i've heard seems to be a quite wierd.. just to confirm.
it is a circuit that uses serial port to provide input to a hex inverter. so the output of this circuit is to be input for the inverter IC.
thanks