Recent content by yscheok

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    Problem in an H-Bridge

    hai audioguru, thanks for ur info, i will try it. thanks for reply me.
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    Problem in an H-Bridge

    Hai audioguru, if i using the snubber at every mosfet to cut out the over shoot current when turn on and off the mosfet, itz can reduce the over heat??  u mean the charging and dischagrging slow will cos the mosfet heat?? Can i reduce the resistor 10K? so that the charging and discharging time...
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    Problem in an H-Bridge

    hai audioguru, can u recommand what type of mosfet driver ic? i have try to put the diod across the the drain and source mosfet, but the result is same. if i using the snubber at every mosfet to cut out the over shoot current when turn on and off the mosfet, itz can reduce the over heat?? ...
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    Problem in an H-Bridge

    hai audioguru, pls help me..... still remember that H-bridge circuit that u have been modified for me........, i have test it and every thing is ok. But got 1 problem is when i doing the switching of the h-bridge circuit fast, the mosfet will over heat and burn the mosfet. i have put a heatsink...
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    Problem in an H-Bridge

    hai audioguru...... :) thanks a lot and speed time with me.... :)
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    Problem in an H-Bridge

    hai...... :) itz high on resistor have to refer datasheet at RDS(on), if more higher then the speed will go slow?? did u have any recomend using what type of MOSFET? if using IRF 1405, itz can maximum the speed motor?? thanks for replying me......... :)
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    Problem in an H-Bridge

    hai...... :) u mean that gate mosfet is the capasitor, so the resistor use to control the speed of charging and discharging the for mosfet switch, m i right?? itz use the concept first order circuit ( Source free RC circuit )? and the RC="tau". when the "tau" is low, the discharging will fast...
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    Problem in an H-Bridge

    hai...... :) u mean that if my supply is 12V, then to turn on the TIP127 is 10V and to turn off is 12V, m i right?? and for TIP122, it need 2 V to turn on, 0V to turn off?? itz true?? the mosfet is control by voltage, mean that we have to control the voltage to the gate mosfet to turn on and...
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    Problem in an H-Bridge

    hai... :) u say that max of 2.5V when the collector current is 3A can turn on the TIP but previous post u say that the TIP127 needs a base voltage of about 22V to turn on and 24V to turn off. which 1 are true?? im confuse?? im not understand about the meaning voltage saturation?? how do we...
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    Problem in an H-Bridge

    hai audioguru, thanks for reply me...... :) i dont really understand that u say:" The TIP127 needs a base voltage of about 22V to turn on and 24V to turn off". from the data sheet the emitter base voltage only 5V, as i know that 5V is the max to turn the TIP, am i wrong?? from the datasheet...
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    Problem in an H-Bridge

    hai audioguru..... :) the input A & B i give it 5V and 0V to turn the TIP 125 ON at side B. or input A receive 0V and side B 5V then the TIP 125 will turn on at side A. this is my circuit H-bridge combine with the PIC controller. I saw at the datasheet that the Icm is 8A, itz max current...
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    Problem in an H-Bridge

    hai..... i have same problem in designing the H-bridge 24V 6.4A, this is my circuit attach in below... my circuit is work already but the transistor darlington are not work fully on......why?? as audioguru say that use 1k input resistors might not give enough current to the darlington...
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    help......how to build line follower colour sensor

    the white colour is emulsion paint, the brighte white colour are not much... when use the red fillter out the the blue colour from the blue LED transmit out mean that the photo detector will receive less light?? thanks for ur help.... :)
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    help......how to build line follower colour sensor

    i really need u all help or u all have any idea where can find some thing like that from any webside??
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    help......how to build line follower colour sensor

    hai, i need some 1 that have any idea about how to build the line follwer colour sensor..... i need it to detect the white line and beside the white line are blue colour.....may u all help me?? :)
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