DC Light Sequencer

[Carl Hall]

Hi, my 1st ever post. I recently bought a Metro Tube Line board. It still has the wiring for each bulb at each station. I have tested and the bulb takes 5v DC. My question is where could I find a sequencer to light the bulbs 1 at a time, at each station? There are at least 24 stations/bulbs end to end. Any advice would be greatly appreciated. Thanks

 

[Harald Kapp]

Welcome to EP.
Today the most simple arrangement will ionvolve a microcontroller for the sequencing plus a set of driver transistors for powering the lamps.

Of course other methods do exist. Here are a few examples:
- You could use a digital counter. A CD4017 chip will count to 10, for more lamps (24 in your board) you will need additional decoding logic.
- Or use the discrete multistage light sequencer from this website which can easily be expanded to 24 stages.

 

[timff]

You may not find a purchasable sequencer at a realistic price. To build one there are several approaches. You may want to select a cascadeable shift register to get the number of outputs you need. If your bulbs take more than 10-20ma each, you may have to isolate the digital outputs using higher current transistors to drive the bulbs.

 

[Carl Hall]

Welcome to EP.
Today the most simple arrangement will ionvolve a microcontroller for the sequencing plus a set of driver transistors for powering the lamps.

Of course other methods do exist. Here are a few examples:
- You could use a digital counter. A CD4017 chip will count to 10, for more lamps (24 in your board) you will need additional decoding logic.
- Or use the discrete multistage light sequencer from this website which can easily be expanded to 24 stages.

Thankyou Harold I will take a look

 

[Carl Hall]

You may not find a purchasable sequencer at a realistic price. To build one there are several approaches. You may want to select a cascadeable shift register to get the number of outputs you need. If your bulbs take more than 10-20ma each, you may have to isolate the digital outputs using higher current transistors to drive the bulbs.

Thankyou I will take a look