Timer circuit

This precision solid-state time delay circuit features both delayed off and delayed on switch functions, which can be interchanged by simply swapping the relay contacts.

The described time delay circuit is designed to provide precise control over the timing of switching operations, utilizing solid-state components for enhanced reliability and performance. The circuit is capable of executing two primary functions: delayed on and delayed off.

In the delayed on mode, the circuit activates the load after a predetermined time interval once the input signal is applied. This is particularly useful in applications where a device should not operate immediately upon receiving power, allowing for a controlled startup sequence. Conversely, in the delayed off mode, the circuit maintains the load in an active state for a specified duration after the input signal is removed, ensuring that the load does not turn off immediately. This can be advantageous for applications where devices require a cooldown period or need to complete ongoing processes before shutting down.

The interchangeability of the relay contacts allows for flexible configuration, enabling users to easily switch between the two modes without requiring extensive modifications to the circuit. This feature enhances the versatility of the circuit, making it suitable for a wide range of applications in industrial automation, HVAC systems, and consumer electronics.

The circuit typically includes a timing component, such as a resistor-capacitor (RC) network or a digital timer, which sets the delay duration. Additionally, a relay is employed to control the load, providing isolation between the control circuit and the high-power load. Solid-state devices, such as transistors or opto-isolators, may be used to drive the relay, ensuring fast switching times and reducing wear compared to mechanical contacts.

In summary, this precision solid-state time delay circuit is an adaptable solution for managing timed operations in various electronic systems, offering both delayed on and delayed off functionalities through simple relay contact interchangeability.This precision, solid state, time delay circuit has delayed off and delayed on switch-functions that are interchangeably available by simply interchanging the relay contacts. A nice circuit!