I would like to build a NiCa zapper and am looking for replacements,
subsitutions for BC131, BC182, BC212.

The zapper is at http://www.atv-projects.com/NiCad_Zapper.html if
anyone would like to take a look and give any comments.

Thanks

dw wrote:
I would like to build a NiCa zapper and am looking for replacements,
subsitutions for BC131, BC182, BC212.

The zapper is at http://www.atv-projects.com/NiCad_Zapper.html if
anyone would like to take a look and give any comments.

Thanks
Be really useful on this group if posters would indicate which country
they are in.

BC182, BC 212 are available in the USA and UK easily enough.

BD132 equivalent is NTE242 but probably lots more equivalents.

JC

On Apr 9, 6:21*pm, Archon wrote:
dw wrote:
I would like to build a NiCa zapper and am looking for replacements,
subsitutions for *BC131, BC182, BC212.

The zapper is at * *http://www.atv-projects.com/NiCad_Zapper.html* if
anyone would like to take a look and give any comments.

Thanks

Be really useful on this group if posters would indicate which country
they are in.

BC182, BC 212 are available in the USA and UK easily enough.

BD132 equivalent is NTE242 but probably lots more equivalents.

JC

It is much easier to charge a large capacitor and then discharge the
capacitor directly acrorss the NICAD battery terminals. It usually
will open up any internal whisker shorts that have developed.

On Apr 9, 8:53*pm, "hr(bob) "
wrote:
On Apr 9, 6:21*pm, Archon wrote:





dw wrote:
I would like to build a NiCa zapper and am looking for replacements,
subsitutions for *BC131, BC182, BC212.

The zapper is at * *http://www.atv-projects.com/NiCad_Zapper.html*if
anyone would like to take a look and give any comments.

Thanks

Be really useful on this group if posters would indicate which country
they are in.

BC182, BC 212 are available in the USA and UK easily enough.

BD132 equivalent is NTE242 but probably lots more equivalents.

JC

It is much easier to charge a large capacitor and then discharge the
capacitor directly acrorss the NICAD battery terminals. *It usually
will open up any internal whisker shorts that have developed.- Hide quoted text -

- Show quoted text -

I use a 4000uf 55V cap and it often will bring back some cells but it
often won't revive really dead cells. I have also used it on entire
battery packs with some dead cells and sometimes it will revive the
dead cells inside and render the pack useable again. I wonder if this
design works better though. I'm tempted to build it. Lenny.

dw wrote:

I would like to build a NiCa zapper and am looking for replacements,
subsitutions for BC131, BC182, BC212.

The zapper is at http://www.atv-projects.com/NiCad_Zapper.html if
anyone would like to take a look and give any comments.

BC182 and 212 are old TO-92 general purpose npn and pnp devices. BC547 and
BC557 are more modern equivalents.

BD131 ( npn 15W datasheet rating 45V ) is rarely seen now as it's an odd
package. One of the TIP power range e.g. TIP 29 (40V 30W) would probably
fit in that location although the package is different. Watch the pinout
and get it the right way round. Data for all these can be googled.

Graham

Eeyore wrote:

dw wrote:

I would like to build a NiCa zapper and am looking for replacements,
subsitutions for BC131, BC182, BC212.

The zapper is at http://www.atv-projects.com/NiCad_Zapper.html if
anyone would like to take a look and give any comments.

BC182 and 212 are old TO-92 general purpose npn and pnp devices. BC547 and
BC557 are more modern equivalents.

BD131 ( npn 15W datasheet rating 45V ) is rarely seen now as it's an odd
package. One of the TIP power range e.g. TIP 29 (40V 30W) would probably
fit in that location although the package is different. Watch the pinout
and get it the right way round. Data for all these can be googled.

Actually it's a BD132 (pnp), so you'd need a TIP30.

Graham