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I want to Produce the sound of school bell (as it rings at the end of every period).i have google it but can not find any circuit diagram that can produce such sound.Can any body give me idea how to produce this sound.
I want to know the working principle of the given mosfet driver circuit.drive signal is from pin no 12 of microcontroller. kindly explain the working principle of the circuit if any one knows.i am confused that the source of mosfet is not grounded then what will be the gate to source voltage to...
I am working on solar charge controller.I do not want to add a diode between solar panel and battery to avoid reverse current from battery to solar panel at night.I tried it with the following circuit but it is not working properly.it is always on whether the signal from MCU is low or high.If...
I want to make an AC mili ampare meter to measure the current between 0 to 1Amp.The required resolution of current is 10 mA. If i put 1 ohm shunt resistor in series with the load then the voltage drop across shunt resistor will be .01 ac vots which is not read by microcontroller ADC.Kindly tell...
I want an array of 8 transistor in an IC package with the following configuration as in attached image.can any one tell me ic part number which has an array of 8 transistor.
My circuit has 4 by 3 keypad interfaced with PORTB.Four rows of keypad connected to RB7 to RB4 and 3 columns are connected with RB2 to RB0 (as shown in circuit diagram).RB7 to RB4 pins are outputs and RB2 to RB0 pins are inputs.First all outputs are high,to read key press output pins goes low...
Answers:
1-No,I have not used pic internal reset circuit.I have set MCLR pin internally tied to Vcc and there is nothing connected with MCLR pin externally(open externally).
2-Yes I have enabled PORTB pull-ups for inputs.
I have checked the circuit with modifications as told by you but the...
I have designed a pic 16f628A based circuit.A 4*3 keypad is interfaced with it to enter password for operating some output.The circuit has to be installed on a motor cycle.The circuit is working fine,but i am facing a problem.when I start motor cycle the circuit takes false input key press...
Dear I have put a 1000uF capacitor at power supply side but problem is still there.Even I have tried with 6800 uF capacitor but controller still restarts.Actually the battery is connected with a generator.At the time of generator start,the motor of generator may draw enough current but when...
Dear all,
I want to power up a pic micro controller from 12V Battery which is about 30 feet away from the micro controller.when I connect the battery with the controller power supply section with 30 feet long wire,micro controller does not work properly.It restarts again and...
Dear All,
I have made a Pic 16f676 based "Automatic Generator Start" circuit.It operates some relays with specified time intervals to star the Generator, when Mians power fail.All is working fine,but I am facing a problem in the circuit.When I power up the circuit with the 12V...
I have a pic 16f73 based ac volt meter.the volts on Adc pin vary from .87v to 1.58v the respective lcd display is from 170v to 230v.
.87v=170v
.93v=175v
.99v=180v
1.05v=185v
1.11v=190v
1.17v=195v
1.23v=200v
and so on.i am unable to understand adc math for this conversion.can any one explain...
I have 150Ah 12v battery.As the recommended charging current of it is 15A.I want to ask if i charge it with half of recommended current 7.5A,will the battery take double time to full charge.and what will its effect on battery.is this good for battery health or not.
I want to know that what is the difference between AC current and DC current.Can I measure AC current with dc ampare meter or DC current with AC ampare meter.
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