SGC successor brainstorming

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Dave
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Re: SGC successor brainstorming

Postby Dave » Wed Dec 19, 2018 10:29 pm

I'll keep my eyes open for you.


tetroid
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Re: SGC successor brainstorming

Postby tetroid » Thu Dec 20, 2018 5:24 am

Dave wrote:I'll keep my eyes open for you.


Thank you.


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Cristian
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Re: SGC successor brainstorming

Postby Cristian » Sat Mar 16, 2019 6:16 pm

Another useful improvement would be a 5+ year battery clock


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Peter
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Re: SGC successor brainstorming

Postby Peter » Mon Mar 18, 2019 8:14 am

Cristian wrote:Another useful improvement would be a 5+ year battery clock

As mentioned at the start of this thread, if a SGC successor was designed by me, it would come with a re-chargeable buffer. That would most likely be a supercap like on the Q68, just larger.
It would probably not hold time for 5 years if the machine is never switched on, but it could simply be recharged by powering on for a while. There would be no battery, no end of life, just the need to use the machine now and then - or to set the time manually if not used for years.

Is that sufficient for you needs?


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tofro
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Re: SGC successor brainstorming

Postby tofro » Mon Mar 18, 2019 8:52 am

My experience with rechargeables to keep the RTC alive in retro computers is mixed:

I'd rather have a clock that loses time every now and then than a battery that potentially destroys the PCB by leaking when not used for half a year.

That was probably an obvious note.

Tobias


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Cristian
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Re: SGC successor brainstorming

Postby Cristian » Mon Mar 18, 2019 3:04 pm

Peter wrote:a re-chargeable buffer.It would probably not hold time for 5 years if the machine is never switched on, but it could simply be recharged by powering on for a while. There would be no battery, no end of life, just the need to use the machine now and then - or to set the time manually if not used for years.

Is that sufficient for you needs?


Excellent! :D


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Cristian
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Re: SGC successor brainstorming

Postby Cristian » Mon Mar 18, 2019 3:18 pm

tofro wrote:I'd rather have a clock that loses time every now and then than a battery that potentially destroys the PCB by leaking when not used for half a year.

Yes this is wise.
Anyway, in my limited experience, I've never seen one leaking battery in a PC motherboard, even if left off and alone for 10+ years. My old Pentium4 battery lasted for about 13 years. So, why not to utilize a PC type button cell? Or maybe the QL clock power consumption is higher and tends to damage the batteries?


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tofro
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Re: SGC successor brainstorming

Postby tofro » Mon Mar 18, 2019 4:10 pm

That experience is mainly based on old Amigas, Ataris and Macs older than 20 years .

I never owned a PC long enough to have the battery leak - They're just not worth to be kept that long. ;)

Tobias


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Re: SGC successor brainstorming

Postby stephen_usher » Mon Mar 18, 2019 6:58 pm

Lithium coin cells do burst and leak but I've only ever seen this once and it's extremely rare. This is totally unlike the NiMH and NiCd rechargables or the half-AA lithium batteries which seem to eat through their casings very quickly.

Coin cells are by far the best solution.


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Cristian
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Re: SGC successor brainstorming

Postby Cristian » Mon Mar 18, 2019 7:03 pm

tofro wrote:They're just not worth to be kept that long. ;)

:-D ...unless you have to run a QL emulator :-)



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