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  • Wistiti
    replied
    I am also interested to build it!

    Leave a comment:


  • GlenWV
    replied
    Originally posted by Matthew Jones View Post
    So that said I am working on one. A 240 watt boost circuit. Couple of days I'll have schematic. Beauty of it is we can also set it up to rotate the batteries.

    What I need to know is how many people would be willing to build one.

    The cost would be the inhibitor. Around $150 dollars. Now you could go cheaper but you might have problems. Boost circuit require a certain amount of noise free area and if you do not build them correctly they will not perform well. The whole thing will be run by and Arduino mini/ Ada fruit trinket.
    You will not need to spend all of that, as thats full price will cover all of the features. The boost circuit part looks to come in around $70+-.

    What I need to know is who' serious. This thread has spread and people who are here at Energetic have the position to be first.

    If your working on this say "I can do it" or not. Just need to know.

    I hope to give you the tools to make this thing work but I am not going to hand this out unless people intend to participate.

    Matt
    Matt,

    I'll build, and appreciate what you folks share.

    glen

    Leave a comment:


  • Matthew Jones
    replied
    Also as far as switching all the batteries position I was little wrong about the cost. You cannot use low cost mosfets as they do not make without protection diodes. You have to use a higher cost IGBT, 5 per battery. I have to try to find a lower cost IGBT with a very low voltage drop, that can handle the wattage.

    Matt

    I added whats needed for the switching. Anybody got a better way?
    Last edited by Matthew Jones; 01-14-2017, 02:24 AM.

    Leave a comment:


  • Matthew Jones
    replied
    Originally posted by Peter Lindemann View Post
    Matt,

    I am definitely interested in this. What happened to the idea of building the 20 Amp Booster based on the 555 chip? I am interested in the simplest circuit possible that operates correctly.

    Peter
    It didn't allow for enough duty cycle adjustment. It would run an input of 10 to 12 volt.

    I want 6v to 13v input with a 14.75 output pretty much fixed, and I really don't want to turn knobs to get it. I hate making adjustment.

    I never have built a 20 amp boost before. I have built a 5 once.
    I use this calculator tool which I already know isn't perfect but works with few tweaks.
    For many small projects, its cheaper and easier to DIY a boost converter than to buy a specialty chip. DIY converters are usually not as efficient but they're quick & cheap!


    These settings get me what I need.
    Freq 180k
    Minvin 6
    MaxVin 13
    MinVout 14.7
    MaxVout 14.8
    Iout 20 amps
    Vripple .1

    So far the main parts I have settled on is:
    Trinket 5 pins allows for ON/OFF, Driver pin, 2 Analog sensors for input/Output. Or if we want to control all the switching We can go with MetroMini. We'll have 2 options.
    Mosfet

    The Driver

    The Inductors 4 of them.
    4 Output Diode
    And several parts that go in between, caps, resistors,ect..

    Not sure what to do about the board. I can generate gerbers and people can order but 1 offs are expensive. I cut my own so maybe we can work out a small Material, shipping and handling price for a milled board.

    I am just heading in that direction. I want to keep it cheap but also want it functional.

    I'll work it all out tonight.

    Matt
    Last edited by Matthew Jones; 06-10-2016, 11:01 AM.

    Leave a comment:


  • Sawt2
    replied
    I am interested, i've been working on this a couple years now looking for it to work consistently.



    Originally posted by Matthew Jones View Post
    So that said I am working on one. A 240 watt boost circuit. Couple of days I'll have schematic. Beauty of it is we can also set it up to rotate the batteries.

    What I need to know is how many people would be willing to build one.

    The cost would be the inhibitor. Around $150 dollars. Now you could go cheaper but you might have problems. Boost circuit require a certain amount of noise free area and if you do not build them correctly they will not perform well. The whole thing will be run by and Arduino mini/ Ada fruit trinket.
    You will not need to spend all of that, as thats full price will cover all of the features. The boost circuit part looks to come in around $70+-.

    What I need to know is who' serious. This thread has spread and people who are here at Energetic have the position to be first.

    If your working on this say "I can do it" or not. Just need to know.

    I hope to give you the tools to make this thing work but I am not going to hand this out unless people intend to participate.

    Matt

    Leave a comment:


  • Peter Lindemann
    replied
    Count me in

    Matt,

    I am definitely interested in this. What happened to the idea of building the 20 Amp Booster based on the 555 chip? I am interested in the simplest circuit possible that operates correctly.

    Peter

    Originally posted by Matthew Jones View Post
    So that said I am working on one. A 240 watt boost circuit. Couple of days I'll have schematic. Beauty of it is we can also set it up to rotate the batteries.

    What I need to know is how many people would be willing to build one.

    The cost would be the inhibitor. Around $150 dollars. Now you could go cheaper but you might have problems. Boost circuit require a certain amount of noise free area and if you do not build them correctly they will not perform well. The whole thing will be run by and Arduino mini/ Ada fruit trinket.
    You will not need to spend all of that, as thats full price will cover all of the features. The boost circuit part looks to come in around $70+-.

    What I need to know is who' serious. This thread has spread and people who are here at Energetic have the position to be first.

    If your working on this say "I can do it" or not. Just need to know.

    I hope to give you the tools to make this thing work but I am not going to hand this out unless people intend to participate.

    Matt

    Leave a comment:


  • Matthew Jones
    replied
    So that said I am working on one. A 240 watt boost circuit. Couple of days I'll have schematic. Beauty of it is we can also set it up to rotate the batteries.

    What I need to know is how many people would be willing to build one.

    The cost would be the inhibitor. Around $150 dollars. Now you could go cheaper but you might have problems. Boost circuit require a certain amount of noise free area and if you do not build them correctly they will not perform well. The whole thing will be run by and Arduino mini/ Ada fruit trinket.
    You will not need to spend all of that, as thats full price will cover all of the features. The boost circuit part looks to come in around $70+-.

    What I need to know is who' serious. This thread has spread and people who are here at Energetic have the position to be first.

    If your working on this say "I can do it" or not. Just need to know.

    I hope to give you the tools to make this thing work but I am not going to hand this out unless people intend to participate.

    Matt

    Leave a comment:


  • Turion
    replied
    I_ron,
    The simple solution is to design our OWN boost module that does exactly what we want it to. I saidSIMPLE, not necessarily EASY

    Leave a comment:


  • i_ron
    replied
    booster101

    Originally posted by Matthew Jones View Post
    I don't see why you even need the diode. Worst case one is running and feeds the output capacitor on the other, and for some reason it doesn't start up. And that would happened if it was tuned lower than the other. But the diode does prevent that.

    Matt
    You might be right... but i wasn't brave enough to try that.

    The diode does add to further inefficiency admittedly.

    But just putting out some ideas here as it is either this one, or a jump up to $50 or $60

    For a really foolproof setup one could add a 2 volt battery to the #1&#2, 24 volt stack... like an old 6 volt battery with the buss bars on top and just add one section to the stack. One could draw as many amps as one desired, Switch over to the next cell when that one ran down and charge the thing as a six volt battery when all three cells needed it.

    Ron

    Leave a comment:


  • Matthew Jones
    replied
    For that matter removing the smoothing caps may also help the overall setup. The modulation will increase across the charge battery.

    If someone want the try, worst case you have to solder a wire from the top to the bottom of the board on the positive side of the cap to complete the trace. But probably not given its configuration.

    Matt

    Leave a comment:


  • Matthew Jones
    replied
    Originally posted by i_ron View Post
    Ask any tech if you can parallel boosters and the answer is NO

    However, when you consider the cost, two boosters for $7 and it might be worth it to take that chance...buy several!

    The main concern seems to be if one starts later than the other one there will be feed back into one and possible reverse flow leading to damage.

    So a protection diode is required.

    In the example below I have two 150 watt converters paralleled using a CTB34 Schottky diode. As you can see the two converters are putting out 11.33 amps into the load. . I didn't think untill afterwards I should have tweaked one of the converters...duh

    [IMG]
    screen capture[/IMG]

    Ron
    I don't see why you even need the diode. Worst case one is running and feeds the output capacitor on the other, and for some reason it doesn't start up. And that would happened if it was tuned lower than the other. But the diode does prevent that.

    Matt

    Leave a comment:


  • i_ron
    replied
    Booster 101

    Originally posted by i_ron View Post

    This is quite a robust little booster.

    Ron
    Ask any tech if you can parallel boosters and the answer is NO

    However, when you consider the cost, two boosters for $7 and it might be worth it to take that chance...buy several!

    The main concern seems to be if one starts later than the other one there will be feed back into one and possible reverse flow leading to damage.

    So a protection diode is required.

    In the example below I have two 150 watt converters paralleled using a CTB34 Schottky diode. As you can see the two converters are putting out 11.33 amps into the load. . I didn't think untill afterwards I should have tweaked one of the converters...duh

    [IMG]
    screen capture[/IMG]

    Ron

    Leave a comment:


  • Aaron
    replied
    account blocked

    Originally posted by erfinder View Post
    Please delete, not block delete my account here at the Energetic Forum. I would do it myself, however, I do not have the authority.

    Regards
    Since you no longer want to be here, your account has been banned.

    Your posts will remain for the record - they will not be deleted.

    If you want to have your account reactivated and wish to honor the rules set forth by anyone that starts a thread, feel free to send a pm to me and I will un-ban your account.

    Leave a comment:


  • Wistiti
    replied
    Originally posted by Turion View Post
    Matt says that the way I have of running the boost circuit may work, so here it is.
    As i see it, my feeling is it may consume moore than it will put out...
    Anyway, the best way to know it; is to test it!

    Hope it will not blow component

    Leave a comment:


  • Wistiti
    replied
    Thank you Ron!

    I am thinking of using a cooling fan on it... depending of how much amp it will drive. I have somes salvage from old computers towers.

    how drop your 24vdc primary with this boost converter?

    Leave a comment:

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