Re: Voltage halver.

On 3 Apr 2024 at 20:07:10 BST, "peter@easthope.ca" <peter@easthope.ca> wrote:

A variable power adapter is required to drive a 6 V, 30 W incandescent
bulb in a microscope.
 
Similar to the 3-12 V 5 A adapter here.
https://www.ebay.ca/itm/305207182573
An adapter providing 1.5-6 V output would be better but I haven't
found one.
 
Rather than limit the adjustment to 6 V, I think of halving the
output.  An integrated circuit in a 4 port package is conceivable.
https://www.youtube.com/watch?v=VJfqBQ2ybpk
 
Does the marketplace offer a solution?
Another idea?
 
Thanks,                  ... P.

Something like this would do the job, provided you're careful to limit the
voltage you use!

https://www.amazon.co.uk/adjustable-switching-precision-charging-interface/dp/B09C8MT4KM?th=1


This is a cheap variable bench power supply which will supply 5A at 6V. You
may want to look at your local market for a suitable mains voltage and plug,
and there are a lot of makes.

Otherwise, AFAICS you're going to need a somewhat more than 6V 5A power supply
and a separate variable voltage converter, which won't be much less in price,
and may need a box to put it in for electrical neatness.


BTW, my memory of incandescent bulbs is that at 1.5 volts a 6V bulb will
barely glow a dim red, BICBW.


--
Roger Hayter