mini power amp schematics?

Discussion in 'The Projects Forum' started by stanman11, Mar 15, 2011.

  1. stanman11

    Thread Starter Member

    Nov 23, 2010
    230
    4
    I want to build a power amp using the most minimum power supply i can from AAA-9v to 12v. is this possible? doeasnt have to have tons of amps. I just need a power amp booster so i can make a heating coil for a vaperizer
    yes for medicle majuana .

    looking for a tiny power amp schematic

    i have
    quad OP amp ic 324 x1
    Dual Op amp ic 272 x1
    ic power amp 386 x1
    ic 555 timer x100
    and some others but im not sure that they are.

    Lets gor with the 272 since its smaller
     
    Last edited: Mar 15, 2011
  2. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    A TDA2822M is a stereo amp IC in an 8-pins case. Its two amplifiers can be bridged for about 3.5 times the output power of a single amplifier.
    Its minimum battery voltage is 1.8V.

    Bridged with a supply of 3.0V and an 8 ohm load its output is 220mW when it is clipping badly with 10% distortion. Also with a 3.0V supply its output is 330mW into 4 ohms, is 120mW into 16 ohms and is 65mW into 32 ohms.
     
  3. wayneh

    Expert

    Sep 9, 2010
    12,153
    3,059
    Can you describe exactly what's needed? I don't understand why you need an amplifier, or what the amplifier would be doing. Isn't a heater coil just...a heater coil?
     
  4. floomdoggle

    Senior Member

    Sep 1, 2008
    217
    2
    Search "little ruby," uses the lm386 works fine from 9 - 12V
     
  5. wayneh

    Expert

    Sep 9, 2010
    12,153
    3,059
    It works fine as a guitar practice amp, but what does that have to do with a vaporizer for medical marijuana?

    (other than the obvious musician = pot head stereotype :cool:)
     
  6. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    Somebody recently asked about an electrical thing that heats marijuana. I can't remember if the marijuana made smoke.

    I think this OP want to "amplify" the small amount of power produced by a little battery.
    But it is impossible because the added power comes from another bigger battery.
    So use the bigger battery instead.
     
  7. CDRIVE

    Senior Member

    Jul 1, 2008
    2,223
    99
    Your battery power capacity is going to be dictated by the power requirements of your heater coil. No kind of amplifier or other device is going to change that.
     
  8. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    He doesn't understand physics (he is a stoned pot head) so he doesn't understand that all the power must come from his little battery that is much too small to make the amount of heat he wants.

    In my home the furnace burns natural gas, not electricity.
    The hot water heater also burns natural gas and does not use electricity.

    Anything that makes heat from a battery discharges the battery quickly.
     
  9. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,754
    760
    hahahahhaha !!
     
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