NPN switch for data transmission/recieving

Other Hardware Robotics
1

Hello,
I am creating an RC car using two receiving/transmission modules to send signals to a logic circuit (not an arduino). The signal voltage from the receiving module is very low, so I am not sure if a MOSFET is the best choice since it is voltage driven....does this mean I should use the BJT instead since it is current driven? I am just not sure if there will be a current initiated through the collector and emitter of the BJT if ANY current is supplied to the base, or if I will need to use an OP AMP to modify the current from the receiver so that it triggers the base of the BJT. The signals between the receiver and emitter read fine on the arduino, but I am just not sure if the current is enough trigger the base. I am using a 2N2222 as the BJT.

*I am using this for a university project where I need to use an FPGA....so I cannot use an arduino as much as I would love to.... ::slight_smile:

2

Not a lot of useful information there...what "receiving module"? What is the output level from the module (in volts not just "very low")?

Please post the Arduino program that "reads the signal fine".

Steve

3

The MOSFET requires much less current then the 2N2222 but that is not intended as an answer. More information is needed. This response is to help you get started in solving your problem, not solve it for you.
Good Luck & Have Fun!
Gil