Here’s an interesting circuit of a wireless door bell/buzzer for electronics students and hobbyists. The circuit is a short-range radio-frequency (RF) tone generator realized with the help of a cheap 433MHz RF transmitter & receiver module pair commonly available from almost all online electronics component shops. Apart from the RF modules, only a 555 timer… [Read More]
555 Timer Circuits
555 Timer IC in electronics is a chip used for building hobby electronic circuits such as timers, motor control etc.
Here you will learn interesting 555 timer projects and 555 timer experiments.
A Cute Night Lamp
Once again, here is the circuit diagram of a little night lamp wired around the evergreen 555 tiny timer chip. The circuit, designed to run on a standard 6F22 9V battery, can be used as a fancy night light in your kids’ sleeping room. A built-in photo sensor in the circuit turns its ‘sleeping lamp’… [Read More]
Secure Water Pump Switch
Here is the circuit diagram of an independent water pump switch controller with ‘soft’ on/off buttons. Since the circuit uses low-voltage switches, even a kid can operate it safely. Besides, there’s also a dry-run protection option to disable the water pump controller if the water level at the sump/underground storage tank goes below a certain… [Read More]