This Design Idea is a two-wire current regulator that strikes a good balance between performance and parts count. Employing three transistors, three resistors, and one LED, it achieves good regulation ...

Some circuits require a constant-current source thatdoesn’t necessarily connect to a power-supply rail or toground. The circuit in Figure 1 shows a simple method forachieving that configuration.

If you got your start in electronics sometime after 1980 your first project might well have been to light up an LED. Microcontroller projects often light up an LED, too, and a blinking LED is ...

This circuit uses a few standard discrete components to provide a user-settable current-limit function with closed-loop performance. In addition, the limiter function can be turned on and off via an ...

Controlling LEDs is really quite simple. As you know, they need to be current limited which is as easy as applying Ohm’s law to your given set of values. To make things even more even there’s a slew ...

Transistors based on graphene ribbons could result in much faster, more efficient computers and other devices. Researchers use a magnetic field to control current flow. A University of Central Florida ...

Abstract: IT IS well known that the variation of the transistor parameters with the dc bias conditions may be employed to control the gain of a transistor amplifier stage. There are, however, many ...

This dummy-load circuit, which is useful for testing power supplies and power amplifiers, is based on the Maxim MAX6006 voltage-reference IC and MAX480 operational amplifier. This dummy-load circuit ...

Abstract: Fully-controlled power semiconductor device-based solid-state circuit breaker (SSCB) not only features fast fault interruption, arcless, noiseless, and no moving parts, but also has the ...