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    WHERE TO BUY MAGNETS?

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    Admin
    Admin

    Posts : 44
    Join date : 2008-12-17
    Location : Sao Paulo, Brazil

    KEPPE MOTOR 3.0 - OPTOINTERRUPTER

    Post  Admin on Tue Sep 14, 2010 2:28 pm


    The emitter of the phottransistor and the cathode of the photodiode are grounded

    The component we use is the PHCT202 manufactured by Photonics.
    I do note have the datasheet of this component with me but I am sending the datasheet of a similar component, the PHCT553. It has the same electrical characteristics, but with a different physical body.
    Be careful that the terminals are identified with different letters:
    A-anode K-cathode E-emitter C-collector. ( while the PHCT 202 that is on the manual 3.0 uses E-cathode D-emitter and + for the collector and the anode)




    CHAVES OPTOELETRÔNICAS TRANSMISSIVAS PHCT553/4

    VALORES MÁXIMOS ABSOLUTOS(Tamb=25oC)
    - EMISSOR
    VR (tensão reversa) 6 V
    IF (corrente direta) 60 mA
    - DETETOR
    VCEO (tensão coletor-emissor) 30 V
    VECO (tensão emissor-coletor) 6 V
    IC (corrente de coletor) 70 mA
    PD (potência de dissipação) 100 mW
    - CHAVE OPTOELETRÔNICA
    Tstg (temperatura de armazenagem) -25 a +100 oC
    Top (temperatura de operação) -20 a + 80 oC
    Tsd (temperatura de soldagem)(t=5s) 250 oC
    CARACTERÍSTICAS ELÉTRICAS(Tamb=25oC)
    (cond.teste) mín típ máx unid.
    - EMISSOR
    VF (tensão direta) (IF=30mA) 1,2 1,5 V
    IR (corrente reversa de fuga) (VR=4V) 10 A
    - DETETOR
    ICEO (fuga coletor-emissor) (VCE=10V,IF=0) 100 nA
    - CHAVE OPTOELETRÔNICA
    CTR (taxa transf.corr.) (IF=20mA,VCE=5V)
    PHCT553 10 %
    PHCT554 20 %
    CARACTERÍSTICAS DE CHAVEAMENTO
    (IC=2mA,VCE=5V,RL=100 
    tr (tempo de subida) 5 s
    tf (tempo de descida) 5 s
    DIMENSÕES FÍSICAS(em mm)
    Especificação Técnica phct553

    Riddle

    Posts : 2
    Join date : 2009-11-30

    Questions on the (Optointerrupter)

    Post  Riddle on Thu Sep 09, 2010 4:54 pm

    Questions on the (Optointerrupter) the Emitter coming from opto to the Base, or is it going to the Emitter? (Transistor Q1) and Question two (Optointerrupter) the Collector coming from opto to the Emitter, or is it going to the Base? (Transistor Q2)

    From the Circuit 3.0 Manual
    Sincerely Riddle
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    Admin
    Admin

    Posts : 44
    Join date : 2008-12-17
    Location : Sao Paulo, Brazil

    KEPPE MOTOR MANUAL 3.0 - OPTICAL SENSOR

    Post  Admin on Mon Sep 06, 2010 9:55 am

    Another question that arrive:
    Can you use a optical Sensor (Photodiode) or dose it have to be a (Phototransistor) in order to work in the Keppe Motor 3.0?
    Riddle

    Answer:

    We use a photosensor that has both components inside. A photodiode and a phototransistor. But you can build one with separate components.
    You need both because the photodiode emits light that is converted into a pulse by the phototransistor when the light is intercepted by the 120 degrees disc attached
    to the shaft.
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    Admin
    Admin

    Posts : 44
    Join date : 2008-12-17
    Location : Sao Paulo, Brazil

    WHERE TO BUY MAGNETS?

    Post  Admin on Mon Sep 06, 2010 9:41 am

    Web Address for the components:
    http://www.farnell.com

    Riddle

    Posts : 2
    Join date : 2009-11-30

    Manual 3.0 Part list and Price.

    Post  Riddle on Sat Aug 28, 2010 7:58 pm

    What about the Manual 3.0 version part list and price. The Circuits Diagram layout and part list from the Manual 3.0 is Crap! I keep e-mailing with on reply! Is this for real? Do you guys have a better circuits diagram layout and part list? Or better yet, anyone have plans on making a step by step video for the 3.0 Motor? In English with a part list?

    Sincerely Riddle

    Ângela Stein

    Posts : 17
    Join date : 2009-04-17
    Location : São Paulo, Brazil

    Keppe Motor 1.0

    Post  Ângela Stein on Thu Apr 30, 2009 1:04 pm

    Now is available to buy all parts individually of the Keppe Motor 1.0 version. You find the list of the parts and price in the http://www.keppemotor.com/partslist.php



    Keppe Motor Team

    gmeast

    Posts : 20
    Join date : 2009-03-16
    Age : 65
    Location : S. California

    magnet supply

    Post  gmeast on Wed Mar 25, 2009 1:53 pm

    Hi,

    I got my magnets from McMaster. P/N 5738K31. They are 1-7/8 X 7/8 X 3/8 and cost 86 cents each. In fact I got the wire, the shaft, the bearings from there also. Because the magnets are a little bigger than the manual says the motor size is scaled up accordingly by about 10%. It should still work well.

    juriz

    Posts : 3
    Join date : 2009-01-03

    Re: WHERE TO BUY MAGNETS?

    Post  juriz on Fri Jan 16, 2009 7:12 am

    I think the reed switch makes the contact at the moment magnet is approaching. The motor uses low current. I think it would not happen this way it the contact was closed the most of one turn of shaft.

    stanis

    Posts : 2
    Join date : 2008-12-17

    Re: WHERE TO BUY MAGNETS?

    Post  stanis on Fri Jan 09, 2009 12:36 pm

    Hi,

    In this motor what type of reed switch is used No or NC?
    The reed switch used to make contact or break conact?

    regards

    stanis

    stanis

    Posts : 2
    Join date : 2008-12-17

    Output Power of the demo Keppe Motor

    Post  stanis on Thu Jan 08, 2009 9:22 am

    Hi,

    What is the mechanical equivalant output power of the said Demo keppe motor(Kit) with the 9V battery

    regards

    Stanis

    j greef

    Posts : 36
    Join date : 2008-12-31
    Location : Europe

    Magnet procurement & sizing

    Post  j greef on Sat Jan 03, 2009 3:07 pm

    Hi,

    As "juriz" indicated, the exact size of the magnets probably is not that important. Today, I finalised a motor with two magnets sized 25 x 40 x 8 mm and they also did the job (shaft running at an estimated 150 rpm, I have no tools to measure the rpm).

    There were even some more deviations:
    * only used 2 x 300 windings instead of 2 x 500 (because I didn't find enough wire);
    * use of slide bearings instead of ball bearings.

    juriz

    Posts : 3
    Join date : 2009-01-03

    Re: WHERE TO BUY MAGNETS?

    Post  juriz on Sat Jan 03, 2009 1:24 pm

    Hello!
    Maybe you can try another size of magnet, not exact size as described in manual. I got magnets of another size (width=1 cm), I have not built motor yet, but going try with the magnets I have. Hope my experiment will be successful.

    Tomte

    Posts : 4
    Join date : 2008-12-25

    Re: WHERE TO BUY MAGNETS?

    Post  Tomte on Thu Jan 01, 2009 10:50 am

    Hi,
    I have found a manufacture on the internet which makes those magnetics. I have not bought them yet and it is a Swedish manufacture. http://www.magnetfabriken.se/LagerlistaFerrit.htm
    I think you need to find a manufacture where you live.

    n2neee

    Posts : 2
    Join date : 2008-12-28

    WHERE TO BUY MAGNETS?

    Post  n2neee on Sun Dec 28, 2008 9:06 pm

    i would like to know where would be the best place to purchase these particular size of magnets cause i cant seem to find jus the right size anywhere. please help ! ty Razz

    magnets
    -2 block ferrite magnets,magnetized perpendicular
    to the large faces. Dimensions:length=4 cm, width=2 cm and thickness=0.8 cm.

    - 1 neodymium cicle magnet. Dimensions: diameter=0.8 cm and height=0.5.

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    Re: WHERE TO BUY MAGNETS?

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