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Relace batteries with cell phone charger

W

WhiteTea

Jan 1, 1970
0
I replaced (3) 1.5V AA batteries used in a called I.D. unit with a
wall transformer that used to charge up a cell phone.

It puts out 6.17 volts DC at .7amp. The displays shows Set Language
but goes no further.

Is it because it is a charger ?

Thanks.
 
J

JeffM

Jan 1, 1970
0
WhiteTea said:
I replaced (3) 1.5V AA batteries used in a called I.D. unit with a
wall transformer that used to charge up a cell phone.
It puts out 6.17 volts DC at .7amp.
It would be smart to learn basic arithmetic.
Start with the product of 3 and 1.5.
The displays shows Set Language but goes no further.
Is it because it is a charger ?
More likely the chips have a limit of 5.25V and you zapped them.
 
W

WhiteTea

Jan 1, 1970
0
It would be smart to learn basic arithmetic.
Start with the product of 3 and 1.5.


More likely the chips have a limit of 5.25V and you zapped them.

I put some NiMh in it and it worked fine.

Good chip design, wider tolerance range. :)

Andy
 
P

PhattyMo

Jan 1, 1970
0
WhiteTea said:
I put some NiMh in it and it worked fine.

Good chip design, wider tolerance range. :)

Andy

The output of the charger is probably pretty noisy.Some filtering might
help.
 
W

WhiteTea

Jan 1, 1970
0
The output of the charger is probably pretty noisy.Some filtering might
help.

Thanks. Is there a link explaining how I can do that.
I have done projects using the circuit boards, diodes, resistors, etc.

Andy
 
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