Basic monostable multivibrator,
please correction of this circuit, if there is an error please be guided.
alarm circuit using a photodiode and ir led.
if the ir led and photodiode blocked an object, it will send a signal to the warning lamp.
To set delay 'on lamp' set the caps.
Here I do not find the speaker components, then I use the lamp as a replacement speaker
:D CMIIW
