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  1. evol_w10lv

    Looking for 3-axis magnetometer chip

    Can anyone suggest very good three axis magnetometer chip? I found few: http://cache.freescale.com/files/sensors/doc/data_sheet/MAG3110.pdf https://www.adafruit.com/datasheets/HMC5883L_3-Axis_Digital_Compass_IC.pdf http://www.st.com/web/en/resource/technical/document/datasheet/DM00075867.pdf...
  2. evol_w10lv

    8086, DAC project and schematic

    The task is to choose all elements, which I need to make project with DAC0808 and draw my own schematic. CPU is 8086. In real life we are using 8086 board, all is connected, schematic will be just projection. I need 8086, clock generator, memory, dac0808 and keypad+lcd (for program input in...
  3. evol_w10lv

    7seg display transistor and resistor values.

    I want to connect PIC16F690 (http://ww1.microchip.com/downloads/en/DeviceDoc/41262C.pdf) with 7seg display. Have got this model: ELT-511SURWA/S530-A3 (datasheet: http://www.datasheets360.com/pdf/-3210061775093412092) Forward current-Max: If = 0.025 A Forward voltage-Typ: Vf = 2 V R =...
  4. evol_w10lv

    Xsens sensor.

    I'm doing project using xsens MTi-G. Data file (gyroscope, accelerometer, magnetometer, Euler angles, GPS data): I can get direction in degrees (heading) from magnetometer, using magnetometer coordinates. What else I could explore, calculate, compare?
  5. evol_w10lv

    MTS51 schematic for speaker

    I'm doing a little project on MTS51 Microcomputer trainer using speaker. Microcontroller: P89C51RC+ Can someone check my schematic? And what about values C1, C2, C3, R2? I have to search information in P89C51RC+ datasheet or values should be calculated?
  6. evol_w10lv

    Op-amp circuit analysis using a transfer function

    I have got transfer functions W(s) and Wk(s), where Wk(s) is correction transfer function. So I calculate W(s) and Wk(s) in series. Magnitude graph before correction: Magnitude graph after correction: But the task is to make whole circuit and simulate it. First of all, I tried to make it by...
  7. evol_w10lv

    RAM simulation using Multisim

    Hi! The task is to simulate 8 rows (pins) 256 cells RAM using Multisim. I guess, it's 256x8 RAM, but Multisim gives just various versions of 8Kx8 Asyncronous Static RAM and 2KxRAM (in the picture): Can I use it? Or there is specific soulution to simulate RAM?
  8. evol_w10lv

    Transfer function for RC circuit

    Hey! I have got this circuit: So.. I have to find transfer function to graph logarathmic amplitude-frequency response and logarathmic phase-frequency response. As we know H(jw) = output phasor/input phasor Input phasor is total impedance (Z). The impedance of a capacitor is 1/(s*C) =...
  9. evol_w10lv

    Power spectral density of signal

    First of all, I have to calculate power spectral density S(jw) of this signal: It looks something like that: t>=0 But it seems to me, that I can't use this standart formula: So.. I see that there is signal multiplication- exponent and sinus, but still not clear how to get spectral...
  10. evol_w10lv

    Two commutation processes for RL circuit

    I have to calculate first commutation process (t=0) and second commutation process (t = 2*τ) Both swithes are closing in the given time moment as I wrote before. I'll do this task step by step, that's why here isn't full of my own solution yet. First of all, I want to ask few...
  11. evol_w10lv

    Half-wave Rectifier with Smoothing Capacitor

    Hello! This time I have to graph few graphics using MATLAB. I don't know, whether you use it or not, but problem is that don't understed exactly, how voltage is changing by the time. I have this loop: And outputs I expect: Given: E(t) = 310*sin(2*pi*50*t) time is changing from...
  12. evol_w10lv

    LCR circuit calculations

    I have to calculate result of voltmeter and wattmeter. And also have to find effective current in the branches Given: e = 180 V R1 = 8 Ohms C1 = 0.0001 F L1 = 0.0318 H R2 = 4 Ohms L2 = 0.0159 H L3 = 0.0094 H f = 50 Hz Here I started calculations. XL1 = 2*pi*f*L1 =...
  13. evol_w10lv

    LC circuit tasks

    I have also got LC circuit task. I add table, where are values, which I have to calculate (I guess all denotations/symbols are international): 1.1 We have got parallel LC circuit. Have to calculate frequency f0, ratio of charge Q and total impedance Z(w) in the range (0.1 .. 10)f0...
  14. evol_w10lv

    Load resistance, dissipated power (AC)

    Hi! I hope that someone will help me to calculate few tasks. 1. We know alternating voltage = 120V, Resistance of wire = 0.3 Omh as we can see in scheme. I have to solve voltage in load resistance, dissipated power in wires and dissipated power in load resistance. 2. The same...
  15. evol_w10lv

    Calculate Current, Power, EMS..

    I have to calculate 1. current in each branch, 2. voltameter result 3. electromotive force (EMS) mode and 4. power bilance. And need to use four methods: Node Voltage Analysis (Node potential method) Superposition Method Loop Current Analysis Kirchoff's Rules Analysis I hope you can...
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