Red Light Relay???

[wjp9639]

Could someone help me build a circuit to run lights in a novelty redlight sequentially like at a real red light? I have an old redlight that I want to put in my shop and make the lights cycle through 3 bulbs sequentially? It's probably pretty simple, but I'm pretty new to electronics. I want to use 3 110v 75 watt bulbs. Thanks, and any help would be greatly appreciated.

 

[ericgibbs]

Could someone help me build a circuit to run lights in a novelty redlight sequentially like at a real red light? I have an old redlight that I want to put in my shop and make the lights cycle through 3 bulbs sequentially? It's probably pretty simple, but I'm pretty new to electronics. I want to use 3 110v 75 watt bulbs. Thanks, and any help would be greatly appreciated.

hi,
I would suggest that you use relays, one for each of the three mains lamps.

A simple sequencer using something like a 555 timer for the oscillator and a 4017 counter/decoder to drive three transistors which would in turn power the dc relays.
You will require a 12V wall wart power supply, about 12Vdc at 300mA.

I'll attach some some circuit links.
Look at the LED sequencer circuits, they use the same timing ideas to drive LED's.

**broken link removed**

 

[KMoffett]

I did that for a friend. I just bought this "traffic light kit" (Google that for others) Traffic Light Kit, model #MK131 - All Spectrum Electronics and used the outputs for one set of 3 LEDs to drive the LEDs in three SSRs that switched 120Vac lamps in his traffic light. Added a Goodwill wall wart to power the circuit.

Ken

 

[wjp9639]

can you point me in the right direction for the ssr relays you used?

can you point me in the right direction for the ssr relays you used?

 

[KMoffett]

If I recall correctly, these are the ones I used: Jameco Electronics Electromechanical: CRYDOM: D2W203F.
This should also work (the first or second): Solid State | AllElectronics.com, and a little cheaper.
And one more: RELAY-SOLID STATE 240VAC/1A -GORDOS USED-MPJA, Inc..


Ken

 

[wjp9639]

Thanks

thanks kmoffett. I just ordered the parts and I think I can assemble them pretty easily. Thanks for all your help. that traffic light kit saved me alot of headache for sure!!!

 

[KMoffett]

To simplify things I left out the set of Rd/Yl/Gn LEDs on the right side or the board and wired the SSR inputs in their place. I installed the LEDs on the left side to act as indicators. I also left out the two sets of three LEDs pointing to the front and back, just to compact things.

Ken

 

[wjp9639]

To simplify things I left out the set of Rd/Yl/Gn LEDs on the right side or the board

When you remove the extra led's do you just leave the circuit open or do you short a wire across where they were?

 

[KMoffett]

Here's the circuit: https://www.allspectrum.com/velleman/MK131/Manual_MK131.pdf
For the uninstalled front and back LEDs, I just left the connections open...as I recall. Actually you can leave all the LEDs off, connect the SSR's (-)input to common, and SSR's (+)input to the appropriate resistors from diode OR'd outputs. Actually you don't need the 100Ω resistors, as the SSR's have internal current limiting resistors.

Ken