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DC 5V/12V NE555 Time Delay Relay Module Adjustable Timer Switch
DC 5V/12V NE555 Time Delay Relay Module Adjustable Timer Switch
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DC 5V/12V NE555 Time Delay Relay Module - Adjustable Timer Switch
This NE555-based time delay relay module provides an adjustable time delay from 0 to 270 seconds (depending on RC component values) before switching a 10A relay output. Powered from 5V or 12V DC, it is ideal for auto power-off circuits, delayed start applications, and timer-controlled switching without any microcontroller programming.
Key Specifications
| Parameter | Value |
|---|---|
| Timer IC | NE555 |
| Supply Voltage | 5V or 12V DC (select variant) |
| Delay Range | 0 - 270 seconds (adjustable via potentiometer) |
| Relay Output | 10A / 250V AC (or 10A / 30V DC) |
| Relay Contacts | NO, NC, COM |
| Trigger Mode | Power-on delay (relay activates after set time) |
| Adjustment | Onboard potentiometer |
| Indicator LEDs | Power LED + Relay status LED |
| Module Size | ~60 x 40mm |
Operating Modes
- Power-On Delay - Apply power; relay activates after the set delay time. Use NO contact for delayed-on switching.
- Power-Off Delay - Relay activates immediately on power; deactivates after delay. Use NC contact for delayed-off switching.
Why Choose This Module?
- No Programming Required - Adjust delay with a screwdriver; no MCU or code needed
- 10A Relay Output - Switches mains loads (lamps, motors, appliances) up to 2500W @ 250V AC
- Adjustable Delay - Potentiometer sets delay from near-zero to ~270 seconds
- NO/NC/COM Contacts - Flexible wiring for normally-open or normally-closed applications
- Visual Indicators - Power and relay status LEDs for easy monitoring
Typical Applications
- Auto power-off for tools and appliances after inactivity
- Delayed fan start after engine/motor shutdown (cooling delay)
- Delayed power-on for audio amplifiers (speaker protection)
- Automatic irrigation timer
- Car accessory delayed power-off (dome light, radio)
- Industrial machine start delay for sequential power-up
Wiring Guide
Connect VCC/GND to 5V or 12V supply. Wire load between COM and NO (for delayed-on) or COM and NC (for delayed-off). Adjust potentiometer clockwise to increase delay time. LED lights when relay is energized.
FAQ
Q: Can I extend the delay beyond 270 seconds? Yes - replace the timing capacitor with a larger value. Delay = 1.1 x R x C. Doubling the capacitor doubles the delay time.
Q: Can this module switch 220V AC loads? Yes - the relay is rated 10A/250V AC. Ensure proper insulation and safety precautions when wiring mains voltage.
Package Contents
- 1x NE555 Time Delay Relay Module (5V or 12V version)
