amplify a signal coming out of this module

[orangemanorman]

Hello everyone:

I have found this module on sale:
https://www.electro-tech-online.com/custompdfs/2011/09/rfidlog_rfid_data_logger.pdf

It outputs a signal at 5V and the external component can draw a maximum of 200mA. I was wondering how can I use an amplifier to amplify this signal to a much higher voltage and output more current? I would like at least 600mA instead of 200mA.

Thanks!

 

[alec_t]

You could use the 5V signal to drive the gate of a logic-level FET of a suitable rating.

 

[orangemanorman]

Okay Thanks Alec. but how can I make sure the current drawn from the module is not over 200mA?

 

[ulipollo]

if you use a MOSFET the current coming out from your module is null since the mosfet gate impedance is very high. If you use a BJT transistor such as a 2n2222 you can limit the current going out from the module for example to 5mA by placing a 1Kohm resistor like in this picture:
**broken link removed**
Vbb is the signal coming out from the module L and D can be your load to drive.

As an alternative you can use a driver like the ULN2003 or a L293D..