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Triac in control of 240V AC with 50Hz — Parallax Forums

Triac in control of 240V AC with 50Hz

EvilMaroEvilMaro Posts: 27
edited 2007-07-03 06:58 in BASIC Stamp
Hi i met another problem and i brust my triac.· I need to run this operation silently so i can't use relay.· I configure the ciruit to a 100k resistor then to transistor (base) and gnd the emiiter·then to a switch which act like·a pin·of·bs2· and the input a 100k resistor and then to·the 240V and the output if the 240V is used to run the equipment.

When i power on the power supply the whole triac explo.... lucky i only use a switch to act like a stamp output if not my stamp will spoil.· Anyone have any idea how to control 240V AC without using a relay?

The link are the circuit i try to modify but i fail.....
http://www.nxp.com/acrobat_download/literature/9397/75015326.pdf

Comments

  • stamptrolstamptrol Posts: 1,731
    edited 2007-06-29 11:23
    Please show us the circuit you had connected.

    I think I know the connections you made, but the triac does not have emitter, base, collector. They are gate, MT1, MT2.

    Or, Google "triac circuits" to get some basic circuits to work with.

    Cheers,

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Tom Sisk

    http://www.siskconsult.com
    ·
  • EvilMaroEvilMaro Posts: 27
    edited 2007-06-29 13:23
    I don't know how to put my pic here anyway i configure the ciruit to be in this way:

    1) The switch act as the out put of the stamp2

    2) the signal is then sent to the transistor base

    3) The emitter is connector to the gnd

    4) The collector is connected to the triac·gate with a 100 ohm resistor

    5) Terminal one of the triac are connected to the 240V AC

    6) Terminal·two of the triac are connected to the output of the machine

    So when i sent a signal from a switch which is configure to a 9v battery the 240v should turn on my machine right?· But instead the whole circuit was explo....

    i hope this help when i write in point form.

    From
    Tony

    ·
  • Martin HebelMartin Hebel Posts: 1,239
    edited 2007-06-29 13:48
    While playing with discrete components and 240V is always fun and exciting, is there a reason you can't use a safer, pre-built package such as a solid-state relay which provides optical isolation so you can't damage your controller·and is controlled like an LED from your Stamp? About $15 for one.....

    -Martin


    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    StampPlot - GUI and Plotting, and XBee Wireless Adapters
    Southern Illinois University Carbondale, Electronic Systems Technologies
  • stamptrolstamptrol Posts: 1,731
    edited 2007-06-29 13:53
    I think you should use the a circuit with opto-isolation between the micro and the 240 VAC circuits.

    The first hit on Google turned up this safer circuit.

    http://www.ee.washington.edu/circuit_archive/circuits/F_ASCII_Schem_PC.html#ASCIISCHEMPC_002

    Cheers,

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Tom Sisk

    http://www.siskconsult.com
    ·
  • EvilMaroEvilMaro Posts: 27
    edited 2007-06-29 15:00
    +5VDC
    | 180 180 2.2k
    +---/\/\/\----+
    + +----/\/\/-+--/\/\/\---+
    > 120V
    | 1| |6 | | Hot
    | +=====+ | | MT1
    | | MC | TRIAC | +-+
    | | 3032| Driver | G | | TRIAC
    | +=====+ | /| |
    \ 2| |4 | / +-+
    2N3904 |----+ | | | | MT2
    / | +
    |
    + |
    V \ | | |
    | / | \ |
    | \ 43 .01u --- 10k / |
    | / 500V --- \ |
    | | | / |
    +
    + | | | Neutral
    | +
    +--+---o o--> 120V
    / load
    (>-/\/\)--| 2N3904
    \
    V
    |
    ---
    ///

    The circuit it self is not rated 240v and also the the diagram is incomplete(i bracket it as where is it connect to 5v dc??) thx for your help thou.

    From
    Tony
  • FranklinFranklin Posts: 4,747
    edited 2007-06-29 17:00
    If you must use ascii to illustrate your circuit insert it as formatted code don't just type it in or you will get gibberish.

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    - Stephen
  • EvilMaroEvilMaro Posts: 27
    edited 2007-06-29 17:58
    the circuit is at http://www.ee.washington.edu/circuit_archive/circuits/F_ASCII_Schem_PC.html#ASCIISCHEMPC_002 but it is 120v but i need 240v... any recommand triac to use?
  • Dan HDan H Posts: 4
    edited 2007-06-29 18:20
    Tony,

    Please stop and consider the danger of using an un-isolated SCR control scheme. This is not a wise move.

    Take a look at this web page: http://www.teledynerelays.com/industrialcommercial.asp In it you will find many different solid state relays and motor controllers that cover a wide variety of power levels and voltages. For example, the LS Series: 30A to 600 VAC SIP SSR found here: http://www.teledynerelays.com/industrial/ls.asp will control 30A @ up to 600v single phase using a control voltage input level from 4v to 14v DC. This module requires a heat sink to be able to cover all its rated power levels.

    Good luck!

    Dan H...
  • sam_sam_samsam_sam_sam Posts: 2,286
    edited 2007-06-29 20:43
    EvilMaro

    I do not Know if you live in USA but if you do this might be what you are looking for Solid-State_Relay with a heat sink on it already i going to use one on my pool pump this weeken

    attachment.php?attachmentid=73929

    http://web6.automationdirect.com/adc/Shopping/Catalog/Relays_-z-_Timers/Solid-State_Relays/AD-SSR225-DC

    ·I hope this will help you in want you want to do

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    ··Thanks for any·idea.gif·that you may have and all of your time finding them

    ·
    ·
    ·
    ·
    Sam

    Post Edited (sam_sam_sam) : 6/29/2007 8:52:20 PM GMT
    p658816-1.gif
    460 x 126 - 3K
  • EvilMaroEvilMaro Posts: 27
    edited 2007-07-02 11:30
    can i ask if there is any SSR that can trigger without any sound?? Cos my project need silent operation and normal relay give a click click sound when trigger...

    by the way i leave in singapore and the voltage here is 240VAC with 50HZ

    Pls advise me


    From
    Tony
  • Martin HebelMartin Hebel Posts: 1,239
    edited 2007-07-02 11:42
    A SSR is just that - Solid state = no moving parts. It uses light to trigger a TRIAC. No clicks.

    -Martin

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    StampPlot - GUI and Plotting, and XBee Wireless Adapters
    Southern Illinois University Carbondale, Electronic Systems Technologies
  • EvilMaroEvilMaro Posts: 27
    edited 2007-07-03 06:58
    k thx alot pal
  • EvilMaroEvilMaro Posts: 27
    edited 2007-07-03 06:58
    k thx alot pal
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