Power supply failure indicator alarm circuit using NE555 IC
Here the circuit for a power failure indicator, which can be used along with any other device to detect a power outage. The circuit uses an external 12V DC for checking the presence of a...
Tagged: 555 circuit
Voltage controlled oscillator circuit – VCO using 555
A Voltage controlled oscillator (VCO) circuit varies its frequency of the oscillation with respect to the externally applied voltage. The VCO circuit can obtain a linear variation of oscillation in relation to the input voltage. The...
IR remote control circuit diagram
The here circuit is for a single channel Infrared remote controller which can be used to control home appliances and devices. The IR remote controller consists of a receiver circuit similar to a latching...
Auto power cut off timer circuit
An automatic timer switch turns OFF a load itself after a fixed period of time. The circuit will be useful for various devices which we forget to turn OFF such as light, alarm, indicator circuits,...
LED chaser circuit using IC 4017 and 555
An LED chaser or LED running light can be used as a decorative light, fancy light, chasing taillight for vehicles, etc. The circuit consists of a 555 astable multivibrator circuit and a 4017 counter...
ON OFF Latching switch circuit diagram using IC 4017,555
A Push On Push off latching switch can use to ON and OFF the load alternatively with the same push action. Push on push off switch using 4017 This circuit is using a decade...
Vibration sensor alarm circuit diagram
The circuit can be used as an intrusion detector alarm which can be simply placed on doors, floors or any surface where any vibration or pressure is generated during any intrusive actions. This burglar alarm...