I want to develop some battery driven applications that require a constant voltage but may not have a constant supply. Whether the supply be solar, battery, or mechanical.
I was looking at developing a circuit like a 'Jewel Thief' that would buck or boost and be very efficient. Then I started looking at finding a chip to do all that work for me.
I found the following chip 'MC34063A', but as I read it does not seem to be the right choice.
The package is probably what would work best: 8 pin DIP.
From reading on 'Jewel Thief' designs they can bump up the output voltage when the source voltage drops to as little as 0.6v. The specs on chips I am finding don't see to go that low.
I found some information on DC -to- DC converters and wonder if what I am looking for is a 'DCM' chip ?

The source will most likely be a pair of 1.5v batteries in series for 3v. for starters

If someone can provide a link to a chip or even a tutorial on how to select a chip like this would be helpful.

Any help is appreciated.
Thank You.

In alt.home.repair, on Thu, 8 Oct 2020 21:12:51 -0700 (PDT), Eli Sidwell
wrote:

I want to develop some battery driven applications that require a constant voltage but may not have a constant supply. Whether the supply be solar, battery, or mechanical.
I was looking at developing a circuit like a 'Jewel Thief' that would buck or boost and be very efficient. Then I started looking at finding a chip to do all that work for me.
I found the following chip 'MC34063A', but as I read it does not seem to be the right choice.
The package is probably what would work best: 8 pin DIP.
From reading on 'Jewel Thief' designs they can bump up the output voltage when the source voltage drops to as little as 0.6v. The specs on chips I am finding don't see to go that low.
I found some information on DC -to- DC converters and wonder if what I am looking for is a 'DCM' chip ?

The source will most likely be a pair of 1.5v batteries in series for 3v. for starters

If someone can provide a link to a chip or even a tutorial on how to select a chip like this would be helpful.

Any help is appreciated.
Thank You.


Try sci.electonics.repair . I think no matter how good the answers
here seem, you'll do better there.

On 10/8/20 11:12 PM, Eli Sidwell wrote:
I want to develop some battery driven applications that require a constant voltage but may not have a constant supply. Whether the supply be solar, battery, or mechanical.
Cut rest.

Try sci.electronics.design People there do that stuff for
a living. They might welcome the diversion from politics.

On Friday, October 9, 2020 at 6:47:19 AM UTC-4, Dean Hoffman wrote:
On 10/8/20 11:12 PM, Eli Sidwell wrote:
I want to develop some battery driven applications that require a constant voltage but may not have a constant supply. Whether the supply be solar, battery, or mechanical.
Cut rest.

Try sci.electronics.design People there do that stuff for
a living. They might welcome the diversion from politics.

Try candlepower forums.

Regulated LED flashlights work that way.

On Friday, October 9, 2020 at 7:32:49 AM UTC-5, TimR wrote:
On Friday, October 9, 2020 at 6:47:19 AM UTC-4, Dean Hoffman wrote:
On 10/8/20 11:12 PM, Eli Sidwell wrote:
I want to develop some battery driven applications that require a constant voltage but may not have a constant supply. Whether the supply be solar, battery, or mechanical.
Cut rest.

Try sci.electronics.design People there do that stuff for
a living. They might welcome the diversion from politics.
Try candlepower forums.

Regulated LED flashlights work that way.

Thanks for all the advice, I will post in those groups.

On Thu, 8 Oct 2020 21:12:51 -0700 (PDT), Eli Sidwell
wrote:

I want to develop some battery driven applications that require a constant voltage but may not have a constant supply. Whether the supply be solar, battery, or mechanical.
I was looking at developing a circuit like a 'Jewel Thief' that would buck or boost and be very efficient. Then I started looking at finding a chip to do all that work for me.
I found the following chip 'MC34063A', but as I read it does not seem to be the right choice.
The package is probably what would work best: 8 pin DIP.
From reading on 'Jewel Thief' designs they can bump up the output voltage when the source voltage drops to as little as 0.6v. The specs on chips I am finding don't see to go that low.
I found some information on DC -to- DC converters and wonder if what I am looking for is a 'DCM' chip ?

The source will most likely be a pair of 1.5v batteries in series for 3v. for starters

If someone can provide a link to a chip or even a tutorial on how to select a chip like this would be helpful.

Any help is appreciated.
Thank You.
what you need is known as a "buck/boost converter" - and it is a
"JouleThief" - a "jewel thief" is a crimninal that steals diamonds,
rubies, and the like