In digital circuit design, especially in microprocessor or measuring applications, it is often necessary to produce a clock signal by dividing down a master clock. The 4-chip solution sugges... Read more
This simple circuit can be used to activate whatever you like, for example, by connecting it to microcontroller, relays, secret alarms, robot applications or just turn on LED1 which lights u... Read more
Sinusoidal voltages signals are often converted to square waves using Zero-Crossing detectors. In this circuit, Op-Amp operates in the open loop comparator mode. The supply voltage can be si... Read more
To detect the arrival of a particular range of voltage(s) from the swing of an input signal, this circuit is used. Two Op-Amps in comparator mode are used in this circuit. A lower comparator... Read more
At the heart of this circuit is a precision integrated temperature sensor type LM35 (IC1), which provides an accurately linear and directly proportional output in mV, over the zero to +155 d... Read more
This broadband AM receiver enables you to ‘monitor’ the shortwave radio band. The circuit has been deliberately designed to have low selectivity and is most sensitive in the range from 6 to... Read more
In single phase AC induction motors, often used in fridges and washing machines, a start winding is used during the starting phase. When the motor has reached a certain speed, this winding i... Read more
An RF detector with a dynamic range of 40 dB can now be obtained from Linear Technology (http://www.lineartech.com/pdf/5505i.pdf). The type LTC5505, housed in a SOT23 SMD package can handle... Read more
Why build an electrosmog (‘E-smog’) detector? The answer is quite simple. More and more of our everyday objects are based on some sort of electrical ‘core’: your toothbrush, camera, cellphon... Read more
It can be handy to have your phone and Internet router continue working for a while after a power failure — for example, if they provide access to a security system. This requires a backup p... Read more