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Recent content by nafnaf

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    [SOLVED] BLDC motor control using PIC

    thanks for that it helps a lot :D and now the motor is running CW and CCW but another problem is that how can i limit the speed of the motor ? i see some people that use arduino uses POT to limit it but how can i use it in PIC ? thanks
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    [SOLVED] BLDC motor control using PIC

    can anybody guide me how to do this im using proteus BLDC star motor pic 16f877 i tried to send 1 and 0 and follow this AN857 6 phases and will run the motor clockwise C5C4C3C2C1C0 P1 0 0 0 1 1 0 P2 1 0 0 1 0 0 P3 1 0 0 0 0 1 P4 0 0 1 0 0 1 P5 0 1 1 0 0 0 P6 0 1 0 0 1 0 but the the...
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    16f877a control using android via bluetooth

    now i can run my simulation in proteus +mikcoC uart terminal but i didnt test it on real world thanks
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    16f877a control using android via bluetooth

    thanks for reply the bluetooth to PIC 3.3v should i use a rs232 for this or should directly connect it ? im using the EGBT045MS also if i use flowcode to program the pic how can i write a statement on the RC7/RX of my PIC other people tell that the bluetooth module sends characters to the...
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    16f877a control using android via bluetooth

    im making a project , a robot has wheel and has a robotic arm ,the adnroid gui use to control the wheels how can i program the adroid to the bluetooth to the pic? im confused on this i know c language but how?
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    Question about change in frequency

    what factors should i consider to be able my circuit to handle very fast change of frequency ? example at 1s 400Mhz at 1s+1us 900Mhz at 1s+1us + 2ns 111Mhz
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    SAW frequency to voltage converter ic

    is there an IC to convert the output frequency of surface acoustic wave to voltage which is 3khz~30ghz or should i make one using op amp ? any suggestion in this much appreciated
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    sensor outputs a very low resistance

    i am ask to make a resitance to voltage converter and it will be able to detect very low resistance (< 1 ohm) any suggestion how to implement that btw here is the pic https://i39.tinypic.com/24xgy09.jpg thanks
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    Help with boost converter

    the power in in 1 ohm resistor reaches 56w should i use a 60w resistor is this possible ? i only see 1w to 10w resistors in some stores here here is the new ckt
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    Help with boost converter

    i think the the pin 4 (RT/CT) and pin 6 (OUTPUT of lt1243) should be like this in simetrix but i see in the ltspice is not aligned like this
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    Help with boost converter

    why is that my OUTPUT is not align to the rt/ct ?
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    Help with boost converter

    its 30v why it needs a switch in r1/c1 and why the emitter is connected in isense i tried without the 2n222 with 2n222 without 2n222
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    Help with boost converter

    Vin 15v Vout 30v Pccm 10w f=500hz i just add a 2n222 that i see from web .what is the function of this 2n222 is the inductor current right like this any opinion on my ckt
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    Boost converter VOltage out dropping slowly

    i simulate it in simetrix this why is that it suddenly stops in 1 sec not in my 5 secs selected time thanks
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    Boost converter VOltage out dropping slowly

    here
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