Mr_Sparkle
New Member
Hi All
I have a 555 sending a 40Khz signal (square wave) to my Ultrasonic Tx and I am receiviing and amplifying the signal with an LM358 ... How do I get a high/low when the signal is present and the the opposite when the signal from the Tx is absent ... this cct is going to be used for a robotic car ... the PIC is going to sense if an obsticle is in the way or not.
Thanks
I have a 555 sending a 40Khz signal (square wave) to my Ultrasonic Tx and I am receiviing and amplifying the signal with an LM358 ... How do I get a high/low when the signal is present and the the opposite when the signal from the Tx is absent ... this cct is going to be used for a robotic car ... the PIC is going to sense if an obsticle is in the way or not.
Thanks