How to make stable reference voltage source?

[Sergejs]

I try anything, but when battery slow to zero my reference voltage too. Is there any program or hard ware to fix it?

[mnfisher]

There's a circuit in this month's PE (practical electronics) magazine. If uses a mcp1501t chip as a 3.3v precision reference.

Martin

[Sergejs]

a circuit in this month's PE (practical electronics) magazine

Martin

Hi, Martin! I try to buy PE of this month, but nothing happen because I can not find how to buy in PDF format. May be, can you send me link please?

Regards.

[mnfisher]

https://www.electronpublishing.com/prod ... sues/2023/

The current (June) issue doesn't seem to be available yet.

Martin

[chipfryer27]

Hi

Following on from Martin, there is unnecessary confusion by the publisher as subscriptions are available from Pocketmags

https://pocketmags.com/everyday-practic ... s-magazine

Do be careful regarding which issue you buy as they are a month "ahead". By that I mean in early June I received the July issue. Previews aren't too informative so be sure of your issue.

Whilst I subscribe, I'm a bit behind in my reading but I've had a quick look through the current issue (July 2023) and in the Multimeter checker/calibrator project it does describe a stable 3.3v circuit as Martin mentioned.

Hope this helps.

[steve001]

HI,

The TL431L is a nice little programable reference

I posted an example the uses it here (2.5 Volts) , Please see amendment further down the post with the red block around it
When i drew that i hadn't had have enough coffee

viewtopic.php?f=3&t=1671

There are quite a few calculators online for this also
Google " TL431 calculator "

Please be aware Precision references take time to stabilise, some cases this can be 20 Minutes

Hope this helps

Steve