This is a very easy build, simple metal detector circuit, built based on a CS209A IC. The circuit will give…
I've found some interesting schematic of load cell amplifier. As we know, load cell amplifier is pretty expensive with fair…
Touch alarm circuit is widely used for security, which is installed on the door. The advantages of this alarm is…
A well-known IC LM35 is chosen to be the temperature sensor in this circuit. Output voltage of LM35 will increase…
The following circuit diagrams are tone detector circuit diagrams which also known as sound activated switch circuit. Actually, these circuits …
This is the basic dark and light sensor which using photoresistor as sensing component. The transistor act like as a…
This is the color detector / sensor circuit diagram. This circuit will sense eight colors that are: green, red and…
Turn on and turn off your electrical devices using touch switch, so you can "play" your electronic devices more fun..…
Flame, gas and smoke detector for fire alarm. You can combine this circuit with alarm circuit. The output will be…
The following circuit is a simple fire alarm circuit based NE555 timer and use thermistor as a temperature detector. This…