help regarding propeller clock circuit

[fever]

hi all
iam follwing Chester's guide to built propeller
clock.(http://hot-streamer.com/hilo90mhz/electronics/prop_clock.htm).the
main problem iam facing in this method is powering base
circuit(http://hot-streamer.com/hilo90mhz/electronics/prop_clock/schematic2.gif).the
base circuit consist of a built in pulser to drive brushless dc
motor(may be motor from HDD).i want to devide this circuit to use it
seperately.

and secondly to switch beteen digital or analog modes he is using IR
link.is it possible to swich modes from base circuit only without
IR.imean by means of push buttons.if it is possible where and what i
have to modify in the ciruit.

if u guys know better clock which is having analog and digital modes,
and can be switched from base please help me
thanks
fever

 

[CWatters]

"fever" <firoz16@gmail.com> wrote in message
news:1109390372.698289.207050@f14g2000cwb.googlegroups.com...

and secondly to switch beteen digital or analog modes he is using IR
link.is it possible to swich modes from base circuit only without
IR.imean by means of push buttons.

I'm not quite sure I understand what you ask. The design _does_ use push
buttons on the static base. The IR is only used to connect these buttons on
the base to the rotating "hands" circuit.

 

[CWatters]

"fever" <firoz16@gmail.com> wrote in message
news:1109390372.698289.207050@f14g2000cwb.googlegroups.com...

main problem iam facing in this method is powering base
circuit

Not hard. It just needs 5V and 12V rails. Use a 12V plug in the wall style
mains adaptor to make 12V. Then a three pin linear regulator like the 7805
to make the 5V from the 12V rail.

 

[fever]

thanks guys.u really helped me a lot
i agree power supply is a big problem here.i connect -ve to motor shaft
and using a bearing to connect +ve.u shld apply some non conducting
media between shaft of motor and bearing.(like tape)
the problem iam facing with base circuit is,author did't mentioned the
components and connections in his pcb diagram
properly.(http://onfinite.com/libraries/350115/3a4.jpg)
this is base circuit pcb diagram.can u guys help me in identifying the
components.(u can edit this).

and i mailed a lot of times to author for help.but he did't replied.so
iam asking u guys for help.

thanks once again
fever

 

[fever]

CWatters wrote:

"fever" <firoz16@gmail.com> wrote in message
news:1109390372.698289.207050@f14g2000cwb.googlegroups.com...

and secondly to switch beteen digital or analog modes he is using
IR
link.is it possible to swich modes from base circuit only without
IR.imean by means of push buttons.

I'm not quite sure I understand what you ask. The design _does_ use
push
buttons on the static base. The IR is only used to connect these
buttons on
the base to the rotating "hands" circuit.

thanks.that means there 2 sets of IR/photodetector.one is for indexing
and other must be to switch modes(analog/digital)and set time.the base
circuit he
provided(http://hot-streamer.com/hilo90mhz/electronics/prop_clock/Motor_controller_layout.gif)
is little confusing.(where is power supply terminal,motor terminal
etc).i will be thankful if some one can simply it(and can mail it).
and he said it has buit in pulser.that mean can i connect a HDD motor
to drive it.
thanks onece again for ur replies
fever

 

[jesrandall]

I have built one of these before

To send information to the propeller clock while it is spinning, you could
have an IR detector located on the center of the the board, that way while
its spinning it stays in the same place. If you dont want to cover up the
front of your clock you could place the IR sensor on the back side (only
if you motor's rotor sticks out on both ends...another way, would be to
use radio communication, but I havn't tried this yet and the IR detectetor
would work great any way. Connecting your detector to op amps could allow
you to control it remotely across a room!

I also had a hard time with power... I liked the idea of the rotary
transformer but ended up using a strip of brass with steel wool brush...
It was inexpensive to make and was extremely quiet...I don't know how long
this would last though.. but it still works for me. I grounded the out
casing of the motor which made the shaft grounded. Then i I only had to
make one brush to carry the positive side. So I put a plast tube around
the metal shaft (as an insulator) and then around it I put a metal tube
which the brush rests on (the brass acts as a spring). The only problem
was that contact was 100 percent of the time, but an electrolytic
capacitor buffered it out perfectly... even for the microcontroller.

 

[CWatters]

"fever" <firoz16@gmail.com> wrote in message
news:1109419372.752095.239880@g14g2000cwa.googlegroups.com...

thanks.that means there 2 sets of IR/photodetector.one is for indexing
and other must be to switch modes(analog/digital)and set time.the base
circuit he provided

There are _3_ IR recievers.....

1) mode
2) time.
3) Index sensor

They are marked on this circuit..

http://hot-streamer.com/hilo90mhz/electronics/prop_clock/schematic.gif

(http://hot-streamer.com/hilo90mhz/electronics/prop_clock/Motor_controller_l
ayout.gif)

is little confusing.(where is power supply terminal,motor terminal
etc).i will be thankful if some one can simply it(and can mail it).
and he said it has buit in pulser.that mean can i connect a HDD motor
to drive it.

This circuit controlls the motor...

http://hot-streamer.com/hilo90mhz/electronics/prop_clock/schematic2.gif

The motor is connected to the signals at the top left.

Ask the designer what type of motor you need.