This ladder logic program can drive an automatic stair lights system via PLC. It consists of a strip of lights fixed along a stair and controlled by photocells. When someone crosses the stair the lights will work with a sequence Continua a leggere Automatic stair lights
Two button control systems are often used on industrial presses to keep the operator’s hands away from the dangerous parts of these machines. Just for hobby purpose I designed a logic gates circuit that activates an output if two buttons Continua a leggere Two button control by logic gates
This timer circuit may be used to automatically switch off the interior car ligth. When the doors are closed, the light turns off with a delay of about twenty seconds. In order to protect the car battery, the lamp works Continua a leggere Car light timer
Two counter circuit. The first one drives Continua a leggere Counter circuits
PLC program of a 4 floors elevator with automatic doors, leveling speed, designed for educational purpose Continua a leggere PLC elevator program
This circuit turns on and off a relay when two resistors of a certain value are detected.
Security alarm circuit based on NE555 and logic gates, which detects the change in the condition of the sensors Continua a leggere Security alarm