R
Radio Man
Guest
Can a cassette recorder be converted for
variable speed playback?
variable speed playback?
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R
Richard Harris
Guest
Place a variable resistor between the motor and yes you can slow down the
speed but not speed it up. If you want to speed it up you will need some
power source to increase the voltage to the motor, which can be done.
"Radio Man" <puns@verizon.net> wrote in message
news:vsPEd.5643$C.1613@trnddc05...
speed but not speed it up. If you want to speed it up you will need some
power source to increase the voltage to the motor, which can be done.
"Radio Man" <puns@verizon.net> wrote in message
news:vsPEd.5643$C.1613@trnddc05...
Can a cassette recorder be converted for
variable speed playback?
P
peterken
Guest
"Radio Man" <puns@verizon.net> wrote in message
news:vsPEd.5643$C.1613@trnddc05...
- if the motor has a built-in regulator, then find the adjustment for it
(usually a small pot behind a small hole)
- if the motor has an external regulator, find the feedback loop and modify
it accordingly
in all cases the motor has a voltage applied which is lower as the supply
voltage, so speeding up also works
never just put a variable resistor in series, it will reduce torque and
increase the so called "wow" due to unregulated speed
news:vsPEd.5643$C.1613@trnddc05...
all of them can, but depending on type of motor :Can a cassette recorder be converted for
variable speed playback?
- if the motor has a built-in regulator, then find the adjustment for it
(usually a small pot behind a small hole)
- if the motor has an external regulator, find the feedback loop and modify
it accordingly
in all cases the motor has a voltage applied which is lower as the supply
voltage, so speeding up also works
never just put a variable resistor in series, it will reduce torque and
increase the so called "wow" due to unregulated speed
J
JeffM
Guest
but as peterken said this screws up the torque.Can a cassette recorder be converted for variable speed playback?
Radio Man
Place a variable resistor between the motor
and yes you can slow down the speed
but not speed it up.
Richard Harris
That might work over a narrow range,
sounds like a bad idea to me.If you want to speed it up
you will need some power source
to increase the voltage to the motor, which can be done.
Putting more voltage to the motor than it was designed to take
To get a higher speed than the original design,
change the drive wheel size.
To reduce speed, use a pulse width modulator.
B
Bob Masta
Guest
On Tue, 11 Jan 2005 12:16:27 GMT, "Radio Man" <puns@verizon.net>
wrote:
have feedback circuits to regulate the speed. Simply adjusting
the voltage to the motor won't do it. This is not a
simple project, because you probably won't be
able to get a diagram of the speed control circuit.
Best regards,
Bob Masta
dqatechATdaqartaDOTcom
D A Q A R T A
Data AcQuisition And Real-Time Analysis
www.daqarta.com
wrote:
I suspect all cassette recorders, even the very cheapest,Can a cassette recorder be converted for
variable speed playback?
have feedback circuits to regulate the speed. Simply adjusting
the voltage to the motor won't do it. This is not a
simple project, because you probably won't be
able to get a diagram of the speed control circuit.
Best regards,
Bob Masta
dqatechATdaqartaDOTcom
D A Q A R T A
Data AcQuisition And Real-Time Analysis
www.daqarta.com