How about a RTG? (Radioisotope Thermal Generator). They were around in 1978... "8) ... On 10/30/18, David C Brown wrote: > I don't think that super caps meet my retro criterion. Components that > were avaialable in 1978 > __________________________________________ > David C Brown > 43 Bings Road > Whaley Bridge > High Peak Phone: 01663 733236 > Derbyshire eMail: dcb.home@gmail.com > SK23 7ND web: www.bings-knowle.co.uk/dcb > > > > > *Sent from my etch-a-sketch* > > > On Tue, 30 Oct 2018 at 19:07, Harold Hallikainen > > wrote: > >> >> > >> > And on further reflection it might be simpler to use a non rechargeabl= e >> > battery. A good PP9 will supply about 400mAH which will cover a lot o= f >> > short outages. >> >> If you don't power the display, will a supercap hold you over during >> outages? >> >> Harold >> >> -- >> FCC Rules Updated Daily at http://www.hallikainen.com >> Not sent from an iPhone. >> -- >> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .