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Conversion of resistance based Adjustable Switching Power Supply to PWM based
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Zero999:
The trouble is he wants to go down to 0V.

One of those power supplies plus a linear regulator would do, but will probably be over-budget.
SiliconWizard:

--- Quote from: gnvrvikram on January 21, 2019, 03:48:44 am ---I need to sweep voltages from 0-25 volts repeatedly.

--- End quote ---

How fast?
Mechatrommer:
should be good for your INR10K...
https://www.ebay.com/itm/Adjustable-KXN-3020D-30V20A-DC-power-supply-LED-High-Power-Switching-Variable/132692230825?hash=item1ee512c2a9:g:ThEAAOSwo4pYVMYP:rk:1:pf:0
if you still think its expensive, rethink of your spec again and reduce to 10A... around INR4K
https://www.ebay.com/itm/30V-10A-220V-Digital-Switching-DC-Power-Supply-Adjustable-Variable-Precision-Lab/132613751949?epid=2086349239&hash=item1ee065448d:g:s0YAAOSw5-hcB3X0:rk:8:pf:0

gnvrvikram:

--- Quote from: Mechatrommer on January 21, 2019, 04:48:40 pm ---should be good for your INR10K...
https://www.ebay.com/itm/Adjustable-KXN-3020D-30V20A-DC-power-supply-LED-High-Power-Switching-Variable/132692230825?hash=item1ee512c2a9:g:ThEAAOSwo4pYVMYP:rk:1:pf:0
if you still think its expensive, rethink of your spec again and reduce to 10A... around INR4K
https://www.ebay.com/itm/30V-10A-220V-Digital-Switching-DC-Power-Supply-Adjustable-Variable-Precision-Lab/132613751949?epid=2086349239&hash=item1ee065448d:g:s0YAAOSw5-hcB3X0:rk:8:pf:0

--- End quote ---

I have seen them. I need them to have a computer control input, which is generally not available. I need to automate the heating.
gnvrvikram:

--- Quote from: SiliconWizard on January 21, 2019, 04:24:56 pm ---
--- Quote from: gnvrvikram on January 21, 2019, 03:48:44 am ---I need to sweep voltages from 0-25 volts repeatedly.

--- End quote ---

How fast?

--- End quote ---

May be about 1 V per minute or even lesser.
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