Upgrade to Switching Regulator

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gammaray
Posts: 586
Joined: Sun Apr 17, 2016 2:44 am
Location: Texas

Upgrade to Switching Regulator

Post by gammaray » Wed Aug 17, 2016 12:50 am

I upgraded to 5V switching regulator to eliminate most of the heat as suggested elsewhere on site.

De-soldering was much simpler than soldering the new pins on the surface mount REG. There is not much of a pad.

The alignment for the original pins did not work so I had to remove and re-solder in the right orientation. If there was room I could have soldered to the bottom of the board.

I ruined the first REG and did the second one differently so as not to remove the pins from the board.

It works but my skill needs much improvement!
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5-TS1000,UK ZX81<-Sheelagh, US ZX81, 2-TS1500/KDLX , 3-TS2040 printer, 2-TS2020 cassette decks, ZXPAND+AY, ZeddyNET, ZXBlast, UDG, ZX8CCB, AERCO, BUILDS/REPAIRS ZX Spectrum, ZX80 Minstrel, ZXMAX48 v1 v2, 2-TS-2068, ROM, 16kRAM

Moggy
Posts: 1826
Joined: Wed Jun 18, 2008 2:00 pm

Re: Upgrade to Switching Regulator

Post by Moggy » Wed Aug 17, 2016 12:18 pm

Nice job there Gammaray. :D

The reg normally used for the zeddy is similar to the one found here...

http://uk.rs-online.com/web/p/switching ... s/6664379/

Not sure if they are usable over your side of the water as the states seem to be a bit stricter over radio emission/noise etc than over here, hence the ground strap and silvered cases of the ZX81/ts1000 sold stateside.

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