Posted on Dec 14, 2012

Infrared emissions detected by Ql are fed through Ula to Ulb, which amplifies the signal by a factor of 100. The amplified output ofUlb is fed to Ulc through R9, C2, and R6. Potentiometer R9 serves as a volume control. With R9 set to pass the maximum signal, Ulc provides a gain of 100, for a total system gain oflO,OOO dB.

Click here to download the full size of the above Circuit.

The output ofUlcis connected to voltage follower circuit Uld to better match and drive headphones that can be plugged into J1.

Leave Comment

characters left:

New Circuits



Popular Circuits

Arduino Actuators
Final Project
LED Emergency Light Circuit With Battery Over Charge Protection
LAN RJ45 Cable Connection Tester
how to make automatic vehicle headlight
modified battery charger circuit
cellphone operated land rover connection to mobile phone problematic
Automatic Light Controller Using 7806 And LDR PCB
Speaker to microphone converter circuit
led blinking 8051 microcontroller keil c tutorial at89c51
High operating voltage regulator circuit diagram
50 Watt Hi-Fi power amplifier circuit