On the surface, a programmable logic controller (PLC ... device built under these specifications will be recognizable to control engineers and maintenance personnel worldwide.

In this quick Arduino tutorial I will explain how you can control a relay using the Arduino Board, one 1K and one 10K resistors, 1 BC547 transistor, one 6V or 12V relay, one 1N4007 diode and a 12V fan ...

If your usual tools are the Arduino and the Raspberry ... you may find ladder logic a little frustrating. Originally, it was a documentation tool for relay logic but has grown to handle modern ...

To operate the transmitter, and especially to accommodate the vacuum-tube amplifier, older transmitters use relay logic, more typically known in broadcast engineering as a control ladder. Essentially ...

In part one of this series, we looked at the PLC’s internal architecture, briefly discussed Ladder Logic programming ... There are 1000 System Control Relays (which are internal CPU-defined memory ...

Ladder logic uses switch or relay contacts to implement Boolean expressions ... Many times, momentary pushbuttons are used to provide user input to a control circuit. If such a switch is used as a ...

1, “PB” stands for pushbutton,”and “CR” stands for control relay. “L1” is a light, and “M1” is a motor. Fig. 1. Note how this electrical diagram resembles the shape of a ladder with two separate rails ...