Coding sequence of 3 lamps blinking in and not in synch

Other Hardware LEDs and Multiplexing
1

Hello, I want to code a sequence using three regular E27 lamps and an arduino. very similar questions as this subject Blinking 3 leds concurrently and independently? but I would need to connect the E27 bulbs to relays and I have never worked with it before.
I would love to get some help into how to implement them in my circuit. In the sequence, I want the lights to alternate between stroboscopic simultaneous lighting, periods of darkness, line sequences etc, to create a sense of desorientation.
Could you help me working towards that goal ? :slight_smile:

2

You don't want to do that with relays. They are too slow, will make a lot of noise and will quickly wear out.

4

Ok thanks for the advise, do you have any idea of alternatives?

5

Mains voltage lighting strobes anyway, at mains frequency (50Hz or 60Hz) or double that depending on the technology in the bulb. Unfortunately, "E27" tells you nothing about the technology, only the size and type of connector.

What frequency of strobing did you want to achieve?

6

yes sorry for the absence of precision, I meant using LED light bulbs. Regarding the stroboscopic effect, my bad I meant more of a fast blinking rate but not wanting to literally achieve a stroboscopic rate, but just a slower flickering effect.

7

Are E27 the long "filament" LEDs that look like straight-filament Edison bulbs?

Here are two simulations which might help you toward your goal. The first shows independent timing of several LEDs. Adjust timing by adjusting the array for timing.

The second shows a smaller scale of timing, with one LED using a pulse train to simulate a human, lub-dub, heartbeat while the other LED gradually combines three PWM values to create colors.

8

For slower blinking rates, relays could work, but they may not last too long, especially the cheap ones sold for use with Arduino.

Solid-State Relays (SSR) might be better.

9

Please read my previous reply.

1 Like
10

thanks yes I started to look into SSR ones, do you have any examples of projects using ssr and lightbulbs sequence ?

11

Sorry, I don't.

But you could look for projects which flash LEDs in sequence. Must be plenty of those. Wire up SSRs and lightbulbs instead of the LEDs....

12

Here is a simulation of a Nano enabling relays in sequence. tenRelays - Wokwi ESP32, STM32, Arduino Simulator

You can create any pattern. relay7seg - Wokwi ESP32, STM32, Arduino Simulator

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