[Swansea Hackspace] bench power supply

[Ceri Clatworthy]

As Justin said.
Get one of those PSU front ends.
NOTE: Most of them DROP the voltage down,

I don't know of any (at a reasonable cost) that Increase voltage.

I would also recommend getting a few metal bode power resistors,
for safety, - wire them up in series with your LED.

probably 1 to 5 Ohms. just enough (hopefully) to protect against PEBCAC !!







On Thu, Oct 25, 2018 at 4:16 PM Justin Mitchell <justin at discordia.org.uk>
wrote:

> On Thu, 2018-10-25 at 16:00 +0100, Andy Davies wrote:
>
> Hi
>
> What other components would I need to have if I had this
> https://www.amazon.co.uk/voltage-converter-switch-power-supply/dp/B0197PNKJG/ref=br_lf_m_basujxxaeroo5oa_img?_encoding=UTF8&s=electronics
> :
>
> 1.  a digital readout of voltage and current
> 2. fixed current output
> 3. variable volts and amps
>
>
>
>
> The DPS5020 and its friends are popular front ends for making your own
> variable power supplies.
> https://www.aliexpress.com/item//32821185351.html
> <https://www.aliexpress.com/item/RD-DPS5020-Constant-Voltage-current-Step-down-communication-digital-Power-Supply-buck-Voltage-converter-LCD-voltmeter/32821185351.html?spm=2114.search0104.3.3.7db04376xNTolX&ws_ab_test=searchweb0_0,searchweb201602_5_10065_10068_10130_318_10547_319_10548_317_10696_450_10192_10190_10084_10083_10618_452_535_534_10307_533_5025915_10820_532_10301_10821_10303_204_10059_10884_323_10887_100031_5728715_320_321_322_10103_448_449,searchweb201603_1,ppcSwitch_0&algo_expid=e089da89-9acf-4691-99b3-a42b50550c11-0&algo_pvid=e089da89-9acf-4691-99b3-a42b50550c11>
>
> the item listings has a chart with all the variants listed
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