![]() Capacitor C2 charges to Vcc via resistors R1 and R2. Capacitor C2, Resistors R1, R2 determines the time period of oscillation. 5 th pin is the Control Voltage pin which is not used in this application, hence it is grounded via a capacitor to avoid high frequency noises through that pin. ![]() 4 th pin is the reset pin which is active low input, hence it is connected to Vcc. 1 st and 8 th pins of 555 are used to give power Vcc and GND respectively. The 100μF capacitor (C1) is used to reduce ripples in the power supply. In the above circuit, 555 Timer is wired as an Astable Multivibrator. The PCM carrier frequency of TSOP1738 is 38KHz, so we want to design a astable multivibrator of 38KHz. It is able to transfer data up to 2400 bits per second. It has high immunity against ambient light and other electrical disturbances. It can be powered using a 5V power supply and its active low output can be directly connected to a microcontroller or microprocessor. ![]() TSOP1738 is a very commonly used IR receiver for PCM remote control systems. ![]() This can be used for remote controls, burglar alarms etc. IR Transmitter and Receiver pair can be easily made using 555 Timer, IR LED and TSOP1738 IR Receiver.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |