So what did we learn from this... that younger Dave was smarter and/or more tenacious than old Dave. :). It will be good to see the actual battery analyser gizmo.
I love these things. I cut out the analog meter on my Variac and installed one....had to relocate the power switch. Installed one into my DIY isolation transformer and DIY light bulb current limiter and multi-outlet power strip I use for my work.
Sorry to spoil your fun .... but I think you will find they are Jaycar QP5570 panel meters. They are 200mV meter which had a add-on panel for the back which had voltage dividers for various ranges.
An interesting long term experoment, with or without a 555 adding its magic. Would the battery holder placing the terminals in compression alter the leakage probability compared to those stored out of circuit ? Just curious !
@@watchmakerful You need more than 7V to get the internal reverence running, as it uses the analogue com pin as the reference negative. Running off 5V means you have to supply the reference externally, and then you have an external reference running between +5V and analogue common, which is a little above the 0V rail, and then connect this reference, which is 0.5 the desired full range, thus the cal pot, you have a 1V25 or 2V5 reference that has a divider with the pot to trim that makes a 100mv reference. you can use a 1V reference as well simply by changing the one resistor in the divider, at the expense of the internal opamps running into a slightly non monotonic region as they run into common mode range limitations. Not exactly the Intersil chip, but that design has been made into many chips as it is both reasonably linear, very easy to integrate into analogue processes, relatively immune to component drift, has nothing critical other than the reference and a short term stable clock. Also important is it is out of copyright and patent protection as well, and is a part of most silicon design libraries as a result of that.
Is 1.999 volt not just enough? For data-grabbing, get an old camera / phone and set it on time-picture. Makes nice video's with only one shot every hour or so.
Can't wait for the livestream! It'll be like an eevblog pitch drop experiment.
So what did we learn from this... that younger Dave was smarter and/or more tenacious than old Dave. :). It will be good to see the actual battery analyser gizmo.
Maybe the L in DLJ stands for Lazy :D
I would have gone through the exact same process to figure out the CX101 for the original video, except that you didn't see the video of it.
When you're done making this battery analyser, will you call it the "batteriser"? :)
I love these things. I cut out the analog meter on my Variac and installed one....had to relocate the power switch.
Installed one into my DIY isolation transformer and DIY light bulb current limiter and multi-outlet power strip I use for my work.
At first glance I thought Junkbin was one of those brands off AliExpress.
give it a week and there will be a supplier called that.......
Sorry to spoil your fun .... but I think you will find they are Jaycar QP5570 panel meters. They are 200mV meter which had a add-on panel for the back which had voltage dividers for various ranges.
You want to run them in series 4 dodgy wall wart phone supplies, and wire to each board.
Letttts doooo the tiiiime-waaaarp aaaagain!
An interesting long term experoment, with or without a 555 adding its magic.
Would the battery holder placing the terminals in compression alter the leakage probability compared to those stored out of circuit ?
Just curious !
ICL7107 clone meter, so you need a separate supply, or isolate the batteries, and use a 18m and 2M resistor for the range dropping.
ICL7106? External reference is strange, these chips have an internal reference source.
@@watchmakerful You need more than 7V to get the internal reverence running, as it uses the analogue com pin as the reference negative. Running off 5V means you have to supply the reference externally, and then you have an external reference running between +5V and analogue common, which is a little above the 0V rail, and then connect this reference, which is 0.5 the desired full range, thus the cal pot, you have a 1V25 or 2V5 reference that has a divider with the pot to trim that makes a 100mv reference. you can use a 1V reference as well simply by changing the one resistor in the divider, at the expense of the internal opamps running into a slightly non monotonic region as they run into common mode range limitations.
Not exactly the Intersil chip, but that design has been made into many chips as it is both reasonably linear, very easy to integrate into analogue processes, relatively immune to component drift, has nothing critical other than the reference and a short term stable clock. Also important is it is out of copyright and patent protection as well, and is a part of most silicon design libraries as a result of that.
Nice, thanks!
I do lke a project on EEVblog 👍
Old video not "a decade ago"... Two decades.
Isn't 200mV fine? Sure they'll overload for a while, but the leaking will happend when they're dead and surely below 200mV
What if they leak at 0.5V or something, would be good to know that.
Time can be very unkind....cheers.
Is 1.999 volt not just enough?
For data-grabbing, get an old camera / phone and set it on time-picture. Makes nice video's with only one shot every hour or so.
It's 199.9mV full scale
Gotta be honest... I miss the old intro. I would love to see it brought back, personally.
*queue MacGyver intro*
34970a ftw