Abstract This article describes the use of a load dump protection circuit to prevent accidental overvoltage/reverse-voltage conditions during prototyping. This simple circuit can prevent hours of rework caused by momentary lapses of concentration ...
The isolated AC-to-DC flyback converter is the most commonly used power supply type for home and industrial devices. Fear of the main voltage and complexity of calculations cause electronic beginners and enthusiasts to procrastinate DIY such ...
Recently, we’ve seen Design Ideas for programmable current sources with improved accuracy using the LM3x7 series of three-legged regulators. These designs also take advantage of those classic devices’ built-in anti-overheating features. ...
There’s been interest recently here in the land of Design Ideas (DIs) in a family of simple interface circuits for pulse width modulation (PWM) control of generic voltage regulators (both linear and switching). Members of the family rely on ...
The switching power supply in Figure 1 produces 3.3 V dc from an input voltage of 2.5 to 20 V dc with high efficiency. The circuit operates at an input voltage as low as 1.5 V once it starts from a minimum of 2.5 V dc, allowing the switcher to ...
My Design Idea (DI), “Flip ON Flop OFF for 48-VDC systems“ ( Ref. 1 ), was published and referenced Stephen Woodward’s earlier “Flip ON Flop OFF” ( Ref. 2 ) circuit. Other DIs published on this subject matter were for ...
Analog topologies abound for converting current to voltage, voltage to current, voltage to frequency, and frequency to voltage, among other conversions. Figure 1 joins the flock while singing a somewhat different tune. This current, voltage, and ...
Some applications require a hot-swap controller, a circuit-breaker function, or both for dual-polarity, dc-input power-supply rails. In some hot-swap cases, the requirement is based only on inrush-current considerations. Control of the inrush ...
A simple, permanent-magnet dc motor is an essential element in a variety of products, such as toys, servo mechanisms, valve actuators, robots, and automotive electronics. In many of these applications, the motor must rotate in a given direction ...
Often you want to turn on and off power to a device with a single pushbutton switch. The circuit below performs this logic function with just a few parts and can operate from DC supplies between +3 V to about 15 V. It uses two inverters within a ...