Simple field strength indicator circuit enables us to check whether an RF based transmitter is transmitting the signal or not. If any fault is present, that is quickly checked. Basically […]
How to Protect Loudspeakers from Over Current Surge
There are plenty of ways to protect loudspeakers against the switch-on ‘plop’. Many of such ways depends on a clamp circuit moving across the input of power amplifier, so that […]
Wire Current Detector Circuit
This simple circuit can be used for detecting 50 Hz current inside a conductor without physically connecting with the conductor. You just have to bring the L1 coil near the […]
Ferrous, Non-Ferrous Metal Detector Circuit
The function of this adsorption type metal detector is to indicate the presence of ferrous and non-ferrous type metals. Its functionality depends on the absorption of magnetic energy. An inductor […]
220V Touch Dimmer Switch Circuit with 4 Step Control
The proposed 4 step touch dimmer circuit can be used for dimming lights in 4 discrete steps using finger touch operations, and also fan seed can be switched up down […]
Switching Lights ON/OFF from Different Locations
More often we need to switch an electric light or an electronic apparatus from various parts from the same building. A particular instance for this is hotel where this switch […]