- Why was the circuit designed to use a Callins in C7? - 1 Update
- low current circuit breaker or fuses? - 1 Update
| "Don" <g@crcomp.net>: Dec 13 03:52PM >> On Sat, 12 Dec 2020 17:54:08 -0000 (UTC), "Don" <g@crcomp.net> wrote: >>> In sci.electronics.design jlarkin@highlandsniptechnology.com wrote: >>>> On Sat, 12 Dec 2020 07:56:15 -0000 (UTC), "Don" <g@crcomp.net> wrote: <snip> > kooky voltage follower Q3 Q11 Q4 - the unijunction Q2 is probably the > least nasty part of it all. > Thats why I used the word unsavoury! Someone elsewhere mentioned how late designer John Simonton tried to use as few parts as possible, presumably to keep the total price down. So my earlier Woz analogy may be more spot on than first realized. Woz's Breakout game design reportedly earned a bonus from Atari because it kept its chip count below 120. Supposedly way down, somewhere in the neighborhood of 50 chips, it's said. Legend has it although Atari paid the bonus (to Steve Jobs) Atari didn't understand how Woz's circuit worked. Danke, -- Don, KB7RPU There was a young lady named Bright Whose speed was far faster than light; She set out one day In a relative way And returned on the previous night. |
| legg <legg@nospam.magma.ca>: Dec 13 07:49AM -0500 >breakers in each line instead? I see plenty of NOS or used ones on eBay >at maybe double the price for fuses, but not always the case as I've >seen fuse packs of similar price to the breakers. You should look at automotive, RV or marine hardware, where battery operated equipment is regularly used. Heaters may offer different hazards that simple fusing doesn't address. Suggest you take a look at commercial units before closing off your design. Unregulated heaters are usually limited to a specific application. RL |
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