Lamp Flasher

[dr]

Hi Ross,

Further to our meeting at Duet yesterday with Peter.

The simplest circuit to alternately flash the lamps would use a LM555
astable oscillator connected timer IC and a relay to switch the lamps. Both
of these are available at DSE or Jacar.

The relay should have a change-over (Form-C0 contact rated at least 5 amps
and be small enough to fit into your battery cylinder. I think you said the
battery was a 12 volt unit, so a 12V relay coil would work nicely over the
full range of battery charge voltage (11v to 13.8v). Some perforated
circuit board could be used to construct the complete unit.

Let me know if this sounds ok for your requirements and I will design a
circuit for you in a jif.

David Richardson.

BTW Have you figured out how to enter the cables into the battery cylinder?

 

[Ken Taylor]

"dr" <firsty@alphalink.com.au> wrote in message
news:41be5d15$1@news.alphalink.com.au...

Hi Ross,

Further to our meeting at Duet yesterday with Peter.

The simplest circuit to alternately flash the lamps would use a LM555
astable oscillator connected timer IC and a relay to switch the lamps.
Both
of these are available at DSE or Jacar.

The relay should have a change-over (Form-C0 contact rated at least 5 amps
and be small enough to fit into your battery cylinder. I think you said
the
battery was a 12 volt unit, so a 12V relay coil would work nicely over the
full range of battery charge voltage (11v to 13.8v). Some perforated
circuit board could be used to construct the complete unit.

Let me know if this sounds ok for your requirements and I will design a
circuit for you in a jif.

David Richardson.

BTW Have you figured out how to enter the cables into the battery
cylinder?


Actually, I'd use a flashing LED, a transistor and the relay. But since this

was obviously meant to be off-group, I won't make a thing of it.



Ken