On-Delay & Off-Delay Timer

Wire a timer so a light comes on a few seconds after you flip a switch (on-delay), then flip it to off-delay and watch the behavior reverse.

What you’re building

Steps

1. Add the parts

   Click Power Source, Single-Pole Switch, Timer, NO Contact, and Light.

2. Set up the timer

   Click the Timer. It walks you through three questions: pick 1 = ON-delay, enter 3 seconds, and give it the letter T. Then click the NO Contact and type T so it follows the timer.

3. Wire the timer input

   To wire, click the first terminal (it highlights), then click the second to connect them. The switch drives the timer through A1/A2.

   Power Source L1 → Switch (left)

   Switch (right) → Timer A1

   Timer A2 → Power Source N

4. Wire the output circuit

   The timer’s contact switches the light.

   Power Source L1 → T NO Contact (left)

   T NO Contact (right) → Light (left)

   Light (right) → Power Source N

5. Energize and watch the delay

   Click Energize, flip the switch — the timer counts down 3 seconds, then the light comes on. Open the switch and the light goes off instantly (and the timer resets).

6. Try OFF-delay

   Click the timer again and choose 2 = OFF-delay. Now the light turns on immediately when you flip the switch, and stays on for 3 seconds after you turn the switch off.