ldr
Light Alarm with Timer 555
Here is the simple and low cost light alarm circuit built using timer IC 555 as the sound generator and…
55 years ago
Light Fence with LDR
This is the light fence schematic diagram uses LDR as the light sensing. The fundamental issue with the greater part…
55 years ago
Color Detector
This is the color detector / sensor circuit diagram. This circuit will sense eight colors that are: green, red and…
55 years ago