Or a small windmill or water-wheel? They were around in 1078 :-) __________________________________________ 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 23:19, John Gardner wrote: > 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 > rechargeable > >> > battery. A good PP9 will supply about 400mAH which will cover a lot > of > >> > 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 > > > -- > 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 .