Two process control signaling schemes were to be supported — the 0 to 10 VDC analog signal, and the venerable 4-20 mA current loop.

Most circuits that require current loss detection use expensive isolation amplifiers. This circuit solves that problem with a simple and low-cost method to detect current loss of 4-20 mA.

The simple addition of a transistor and resistor to the open-circuit drive overcomes this dilemma by limiting current through the drive transistor. Transistor Q2 provides the open-collector drive ...

A Simple Over-Voltage Protection Circuit for LED Drivers This boost circuit implements current mode control and senses the LED current via resistor R14. The output voltage is boosted to just over 30V ...

I can also vary the base voltage and control the amount of current through the LED or other load devices. However, for some loads, even this circuit might be an improvement over a simple resistor.

Short circuit current ratings should not be overlooked during panel design. Negative impacts can occur to production, equipment and, worst case, plant personnel.

A preferred method would be to use the power-supply controller to precisely control the start-up-voltage sequencing of the power-supply rails. Figure 1 shows a simple op-amp circuit that integrates a ...

This SCR phase control works much like the common TRIAC dimmer, but has numerous advantages including increased current capability, robustness and absence of minimum voltage “snap-on.” A complementary ...

A simple electric circuit learns to classify data in a creative new design that could lead to more energy-efficient machine-learning hardware.