There were bistable 'pixels' used in railway clocks for a long time, distel.co.uk had them for a while and may still have. On 15 Dec 2016 15:01, "David C Brown" wrote: As I said to Crish relays don't give an easily readable indication of their state. The flip over disc is more what I was thinking off. And ISTR a device which showed either all black or eight segments, alternately orange and black, by rotating a disc __________________________________________ 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* -- 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 .