Sunday 3 March 2019

transistors - Controlling LED with 300mV AC signal


I would like to control an LED with audio signal, but the problem is, that output signal is only 150mVpp (with 150mVpp positive offset). In my understanding, it needs to be higher than 0.6V to get the transistor running, therefore I am not sure what to use instead. Do I maybe need an opamp in the middle? Any tips?



schematic


simulate this circuit – Schematic created using CircuitLab




No comments:

Post a Comment

arduino - Can I use TI's cc2541 BLE as micro controller to perform operations/ processing instead of ATmega328P AU to save cost?

I am using arduino pro mini (which contains Atmega328p AU ) along with cc2541(HM-10) to process and transfer data over BLE to smartphone. I...