One small part of the oven stayed behind. It had a timer module using a nice old-fashioned green vacuum fluorescent display, so I removed that in case I can think of a use for it in the future. At the very least I thought it'd contain a relay that I could perhaps use.

It turns out that the relays operate on 24 V, which isn't great for me. But my favourite part in the timer is the TMS1070. This is part of the TMS1000 family of processors used in a lot of calculators in the 1970s. It's a four bit embedded processor with 1 kB of masked ROM and 64 nibbles (half bytes) of RAM.

The TMS1070 variant of the chip switch the higher voltages used by vacuum fluorescent displays, which is of course required in this example.

There's a bit more information about the TMS1070 here:
http://www.datamath.org/Chips/TMS1070.htm

You'll note the 1990 date code (the oven was 34 years old). I also have another digital clock with a TMS1000 derivative in it dated 1976. It's been powered up pretty much full time since then and still works perfectly:
https://hembrow.eu/electronics/profordsdc18.html
#electronics #tms1000 #texasinstruments

37.8 km/h. That was Tadej Pogacar's average speed for yesterday's tour stage.

I had the same average speed yesterday... But not for long. If I'd been able to keep it up for 200 km instead of just the 10 km distance between home and the start of our group ride, without a howling tail wind, and including climbing several of the Pyranees then perhaps I'd also be in France right now.

We can all dream, but I know of course that that was always way beyond my ability. Pro cycle racers are *astoundingly* strong.

Anyway, here are some photos from yesterday's 100 km ride with @twilwel and @TheoZw, which was carried out at a much more moderate and sociable average speed, including stops for lunch and other things, including visiting some mastodons.
#regel17 #cycling #BikeTooter #velomobile #mastodons