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On Sunday, September 10, 2023 at 10:55:47 AM UTC-7,
pe...@easthope.ca wrote:
> Hi,
>
> The supply in this photo powers an incandescent bulb of a Zeiss
> microscpe.
http://easthope.ca/ZeissLampSupplyLPS7.5.jpg
... and a replacement is wanted
> A simple alternative is a 6 V brick adapter and potentiometer.
>
> Other ideas?
The simple idea is expensive, if the potentiometer has to handle
the 15W power requirement.
A cheap alternative is a suitable power brick (old laptop power
supply, 19V/3A being
a common rating) for plugging into the wall socket, and a switchmode
buck regulator (LM2596 is a keyword to try, or
-dc-dc-step-down-voltage-regulator-dc-xl4016e1-digital-display-g-601099513527641
.html> )
You`ll want to add a fixed resistor to the potentiometer output
control, so it only goes zero-to-6V; that
bulb is likely to be a hard-to-replace item. Testing with an old
auto headlamp bulb would be my recommendation.
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