Mathematical Equations to compute Angle using Arduino-Uno-HCSRO4 Sensor

It is not about 2 or 4 channels...Its all about the pins of MAX232 and LM324 of HC SR04 that need to be considered.....Forget about 2 or 4 channel.
Hope u understand!!

Naveena:
It is not about 2 or 4 channels...Its all about the pins of MAX232 and LM324 of HC SR04 that need to be considered.....Forget about 2 or 4 channel.
Hope u understand!!

I believe the schematic for the device is in the public domain. It should show you enough to find the test points you asked about.

It is not about 2 or 4 channels...Its all about the pins of MAX232 and LM324 of HC SR04 that need to be considered.....Forget about 2 or 4 channel.
Hope u understand!!

Its all about the pins of MAX232 and LM324 of HC SR04 that need to be considered

See reply #18.

Hi pls help me with the Schematic and circuit level understanding of HC-SRO4 module.How does the circuit behave or function. Esp the transmitter and receiver circuits

See Complete Guide for Ultrasonic Sensor HC-SR04 with Arduino | Random Nerd Tutorials

Hi pls help me with the Schematic and circuit level understanding of HC-SRO4 module.How does the circuit behave or function. Esp the transmitter and receiver circuits

See link in reply #18