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Recent content by long0900

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    [SOLVED] Capacitance multiplier

    Hello, FvM To achieve a better resolution
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    [SOLVED] Capacitance multiplier

    Hello all, Can I use the capacitance multiplier with a capacitance meter ?
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    Some questions about buck converter circuitry

    Thanks barry, I read the datasheet but I'm confused because if I use that formula, it give me a value ten times less than the one in tthe datasheet
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    Some questions about buck converter circuitry

    Hi! I want to ask some question about it : 1. Is is ok to use the kind of Mosfet which attached with a diode in a basic buck converter? 2. I have read some basic calculations of buck converter, they recommend me a minimun value of inductance for a specific converter. So Is it alright to use...
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    Build a constant current circuit

    Hi, Klaus I'm sorry! It's not "a BJT and some resistor", it's "a N JET and a resistor". That is a thing called constant current diode. Or you can make a constant current source using saturation mode of JFET and D MOSFET: " In the saturation mode, a MOSFET's source-drain current is...
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    Build a constant current circuit

    Hi I think you can build a raw current source with a BJT and some resistor, if you know the load resistance.
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    My first project is encountering some problems

    Hi E, Thanks for your help You are partially right about my 1st problem. I have found another weird problem When I disconnect all digit selecting pins and GND pin from the 7 seg display, the fourth digit still glowing ?! - - - Updated - - - Hi, I dont think it is caused by the noise, because...
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    My first project is encountering some problems

    Hi I have made a voltmeter using PIC and some 7 segment display. Basically, it's worked but having some problems: 1. When there is nothing connected to the measuring pin, 7 seg leds keep showing random numbers. 2. While displaying a digit, other segments aren't completely off, they are still...
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    [SOLVED] I am gonna make a Voltmeter using pic16f716 and I need some advice about the code

    I know that, I dont need so much precision - - - Updated - - - Here is the code: short digit(short a){ switch(a){ case 0 : return 0x3F; case 1 : return 0x06; case 2 : return 0x5B; case 3 : return 0x4F; case 4 : return 0x66; case 5 : return 0x6D; case 6 : return...
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    [SOLVED] I am gonna make a Voltmeter using pic16f716 and I need some advice about the code

    Yes! I know that 2 things but please look at the ADC section of the datasheet, I dont understand how to configure ADCON1 register And, I think it isnt neccesary to use the "look" function in your example.
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    [SOLVED] I am gonna make a Voltmeter using pic16f716 and I need some advice about the code

    Hi!! PIC16F716 has 13 I/O pins ( 5 for PORTA, 8 for PORTB),I am using PORTB for driving each segment of 7 segment LED, 4 pins of PORTA for driving each digit and pin RA0 for input voltage. I am using mikroC because I dont have to worry much about the configuration but I quite not sure about how...
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