This circuit shows that dimmers intended for use at mains voltage do not always have to contain a triac. Here, a MOSFET (BUZ41A, 500 V/4.5A) in a diode bridge is used to control the voltage... Read more
In many small battery powered apparatus it is common to have an LED act as a combined indicator for ‘power-on’ and ‘battery state’. The most commonly seen circuit for this is shown in Figure... Read more
Display driver ICs are available in several standard implementations. This circuit makes use of a GAL 22V10 to drive two 7-segment displays without multiplexing. A 4-bit binary code at input... Read more
The use of solar photovoltaic (PV) energy sources is increasing due to global warming concerns on the one hand, and cost-effectiveness on the other. Many engineers involved in power electron... Read more
Some microcontroller applications require status information or other important data to be stored to EEPROM immediately as a power to the equipment is turned off or fails. When power is resu... Read more
Your everyday 7805 regulator is not the best choice for powering accurate measurement circuits and A/D converters, mainly because it generates too much noise, and exhibits spurious behavior... Read more
This all-analog, microcontroller free (!) project got designed in response to cries for help from a diehard model plane enthusiast on the Elektor staff. He likes to fly large high powered mo... Read more
This simple circuit is designed for use with all kinds of DC motors up to 40 amps. Basically, it’s just a simple oscillator driving a bunch of power MOSFETs. The oscillator is a rudimentary... Read more
A step-up or boost converter circuit converts a low voltage into a higher value output voltage. The circuit consists of an inductor, a capacitor, a diode and a switch (transistor) that are t... Read more
These days you can buy various types of LED garlands at a reasonable price. With these, you can illuminate various objects indoors or outdoors with interesting lighting effects. When you use... Read more
