This circuit is an ultrasonic distance meter without using microcontroller.
Distance range for this circuit is between 2cm up to 450cm ,
However i get the best accuracy at distance less than 300cm.
You can order the PCB from here:
Parts list:
Ultrasonic module HC-SR04
IC 40110 (3pcs)
IC NE555 (2pcs)
IC 7805
Seven segment common cathode (3pcs)
Resistor 1K (22pcs)
Resistor 2K
Resistor 3K (2pcs)
Resistor 20K
Resistor 33K
Resistor 100K
Capacitor 680uF
Capacitor 100uF
Capacitor 100nF (2pcs)
Capacitor 220pF
Transistor 2N2222
Multiturn potentiometer 200K
IC Socket 16DIL (3pcs)
IC Socket 8DIL (2pcs)
Battery 9V
Holder for 9V battery
Dip switch 1p
Circuit:
For better resolution you can download the circuit as a PDF file from here:
https://drive.google.com/file/d/12MKksudA8kyZsG782npDamxVtN9INbnZ/view?usp=sharing
Video:
