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Rockbox mail archiveSubject: JB not starting with remote pin connected ?From: Matthias.Klumpp_at_gmx.de Date: 2004-06-20
Hi,
I was just observing a strange behaviour of my JB Studio 20.
As I know the AJB's are operating with 3,3V.
With my remote control I'm connected with a open collector transistor (T).
3.3V
T is a PNP BC557 transistor controlled by a Atmel uC.
What I was observing is the following:
Normally the JB shows now "Charging".
In that above described scenario, it is switching on the green LED, but not
If I do the same, but holding down the base of the transistor to low level
Is anybody able to tell me the reason for that ?
Another question is more HW basics related:
Is there any difference in the following transistor circuits ?
Open Collector (with PNP transistor):
+-----to JB remote
Open Emitter (with PNP transistor):
+-----to JB remote
Many thanks to you
Matthias
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