CrazyEngineers Forum - Electrical & Electronics Engineering |
- 8255 OR buffer???? help plz
- AD633 Multiplier Problem
- Capacitance based Eye Blink sensor
- Difference b/w orifice plate & elbow taps for flow control and measurement
| Posted: 05 Oct 2010 07:38 AM PDT I wani ti control LCD(20*4),4 DC motors,LM35,solenoid valve,keypad,buzzer and somr LEDs with one single MICROCONTROLLER. For ports expension what i should use 8255 or BUFFER(74241/74242 ETC.) |
| Posted: 05 Oct 2010 06:36 AM PDT Hi, I am designing a power meter which using the multiplier LM331 to multiply the Voltage and Current signal. The voltage and current signal will be go through the sample and hold circuit and the output of the sample and hold will be go into the LM331 multiplier. Power, P=VIcos(angle) and the LM331 having a transfer function of output W = [(X1-X2)(Y1-Y2)/10V]+Z. The problem is for example V=3V and I=2A, Output should be 6W(ignoring the cos(angle)). Due to the transfer function of LM331 i will never get the output 6W that i want. So anyone there can help me out? =) |
| Capacitance based Eye Blink sensor Posted: 05 Oct 2010 03:23 AM PDT Hi i have seen a few project titles which make use of sensors like capacitance based eye blink sensor, capacitance based breath detec sensor but i could find help for these over internet kindly share knowledege about these if you know regards deepak |
| Difference b/w orifice plate & elbow taps for flow control and measurement Posted: 05 Oct 2010 02:04 AM PDT difference b/w orifice plate & elbow taps for flow control and measurement |
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