V
Viggo Simonsen
- Jan 1, 1970
- 0
Hi there,
I am baffled by the following problem:
Im trying to make a DC buzzer work. I've got a DC power supply 12V,
4,8 W.
Connecting the terminals directly to the buzzer produces a clear sound
- so the buzzer is all ok.
From the DC source there is a cabling of about 20 m to another room
where the voltage is still 12,5 V. But here, the buzzer fails to make
a proper sound; there is only a faint attempt, and there is no DC
current measurable through the buzzer either.
The voltage at the far end of the DC source suggests no breach of the
line, the impedance of the cable is negligable compared to the buzzer
(otherwise there would also be voltage drop), the current can easily
light up a bulb - but it can't drive the buzzer.
Has anyone got a clue what the problem may be?
/Viggo
I am baffled by the following problem:
Im trying to make a DC buzzer work. I've got a DC power supply 12V,
4,8 W.
Connecting the terminals directly to the buzzer produces a clear sound
- so the buzzer is all ok.
From the DC source there is a cabling of about 20 m to another room
where the voltage is still 12,5 V. But here, the buzzer fails to make
a proper sound; there is only a faint attempt, and there is no DC
current measurable through the buzzer either.
The voltage at the far end of the DC source suggests no breach of the
line, the impedance of the cable is negligable compared to the buzzer
(otherwise there would also be voltage drop), the current can easily
light up a bulb - but it can't drive the buzzer.
Has anyone got a clue what the problem may be?
/Viggo