1.5v battery converter

[WM6]

Two stocking distributors (you can expect minimum order, so you can resell surplus):

Here:

Company Name: Metrocomp Ltd Address: Unit 14 Northbrook Business Park Worthing
West Sussex BN14 8PQ

Country: UK Tel: 44 203 2396 773 Fax: 44 203 0148 715Contact Person: Matthew Martin
Website Address http://www.metrocomp-group.com E-Catalog Address http://metrocomp.hkinventory.com Email [email protected]


or here:

Company Name: Semiconductor bv Address: v.d.burchstraat 40
Country: Netherlands Tel: 31 23 5653883 Fax: 31 23 5652023Contact Person: Henk Talen

[Geo]

Two stocking distributors (you can expect minimum order, so you can resell surplus):

Here:

Company Name: Metrocomp Ltd Address: Unit 14 Northbrook Business Park Worthing
West Sussex BN14 8PQ

Country: UK Tel: 44 203 2396 773 Fax: 44 203 0148 715Contact Person: Matthew Martin
Website Address http://www.metrocomp-group.com E-Catalog Address http://metrocomp.hkinventory.com Email [email protected]


or here:

Company Name: Semiconductor bv Address: v.d.burchstraat 40
Country: Netherlands Tel: 31 23 5653883 Fax: 31 23 5652023Contact Person: Henk Talen

WM6 thanks.
Finally i found at Farnell
http://uk.farnell.com/texas-instrume...dip/dp/1755281

Regards

[WM6]

WM6 thanks.
Finally i found at Farnell
http://uk.farnell.com/texas-instrume...dip/dp/1755281

Regards

Yes Farnell as usual. Thank you, Geo.
Please report about item delivery, it is "comming soon" now.

[Geo]

Hi
Finally i did not order from Farnell.
I found at a local electronic shop the TL497A. About the same, more current but need at least 4.5v input. No problem.... i connected it with 4 rechargeable AA batteries and now i have the 16.5 v that i need plus a 9v stabilized.

[DIRCEU]

Hi
Finally i did not order from Farnell.
I found at a local electronic shop the TL497A. About the same, more current but need at least 4.5v input. No problem.... i connected it with 4 rechargeable AA batteries and now i have the 16.5 v that i need plus a 9v stabilized.

Hi! Geo

Can you post the schematic here???
Best Regards

Dirceu

[Geo]

Hi! Geo

Can you post the schematic here???
Best Regards

Dirceu

Hi.
I will draw it and i"ll post here

Regards

[Geo]

Dirceu here is the schematic.
To change the out voltage you must replace the R3.
Vout= 1.2+R4(Kohm). So for 9v you need a 7.8K resistor.

Regards

[DIRCEU]

Hi! Geo

Very good and useful.
Many Thanks, Geo.

Regards

Dirceu.

[WM6]

Vout= 1.2+R4(Kohm).

Geo, thanks.

Are you sure in given formula?

On schematic you have: 13,2V=R4 (1.2k)+R3(12k)

Then formula have to be: Vout(V)=1.2(V)+R3(kOhm)

[Geo]

Geo, thanks.

Are you sure in given formula?

On schematic you have: 13,2V=R4 (1.2k)+R3(12k)

Then formula have to be: Vout(V)=1.2(V)+R3(kOhm)

Hi WM6
I made mistake between R3 and R4.
Yes you wrote the right formula.
Thanks


Regards

[Geo]

Help for calculation

Hi.
I attach a schematic of a converter from 12V to 24V.
I took the schematic from Texas Instruments datasheet and i made the calculations except Q2, R4 and R5.
Who can help me, so to calculate the R4,R5 and Q2??

Regards