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  1. audioguru2

    12 V DC to a 220V AC Inverter AMplfier Design

    Are you making a square-wave inverter or a modified square-wave inverter? Its voltage also depends on how much is the voltage loss of your Mosfets and what transformer voltage is available. For a modified sine-wave inverter, 8V-0-8V to 10V-0-10V will be fine. For a square-wave inverter, maybe...
  2. audioguru2

    Audioguru FM Tx

    Hi Walid, 12V is a very high voltage for the circuit. With 9V, Q3 has an average of 9V across it and an average of about 40mA through it. Therefore it dissipates about 9V x 40mA= 360mW. With 12V, Q3's current will increase to about 53mA. Therefore it dissipates about 636mW. The max dissipation...
  3. audioguru2

    12 V DC to a 220V AC Inverter AMplfier Design

    A 150W inverter needs a 150W or higher transformer. The input must be calculated from the battery voltage (13.2V?) minus the loss from the Mosfets then multiplied by the root of two to get the peak voltage of the modified sine-wave for each half of the winding. The LM358 is slow but is much...
  4. audioguru2

    Convert 0-30V 3A PSU to 5A or more

  5. audioguru2

    component

    The CA3161 and CA3162 multiplex the display so the wiring to the display is not much. The ICL7107 has direct drive to each segment of the display so it has lots of wiring (wiring mess?).
  6. audioguru2

    FM receiver circuit

    The circuit is only part of an FM radio. I remember seeing those old ICs about 30 years ago. They aren't made anymore.
  7. audioguru2

    12 V DC to a 220V AC Inverter AMplfier Design

    I read the instructions. ;D
  8. audioguru2

    Vocal Remover Circuit

    Both stereo channels have the vocals at the same level (in mono) and both are in phase. The circuit takes the 1st channel's vocal sounds, inverts their phase with an opamp inverting amplifier then adds them to the 2nd channel's original sound. Since the sounds are the same but with the opposite...
  9. audioguru2

    12 V DC to a 220V AC Inverter AMplfier Design

    I use Microsoft Paint program. I make straight lines with the Shift key down and I copy and paste parts and pieces of other schematics and from datasheets. Yes, use an opamp. The LM358 has outputs that go to ground. 396us is the time for the very high value of the 33k resistor to charge or...
  10. audioguru2

    Convert 0-30V 3A PSU to 5A or more

    Hi Roomi, Welcome to our forum. ;D Good idea! The TL431 or TL432 adjustable voltage references are much better than the D8 zener diode and the project would be better with one. R4 in the project would power it and two resistors must be added to set its voltage to 11.2V. The schematic for the...
  11. audioguru2

    12 V DC to a 220V AC Inverter AMplfier Design

    Hi Kachew, It is hard to see your schematic. Make it on the computer with Microsoft Paint or another program. I didn't check your CD4047 circuit. It should be the same as the 500W square-wave inverter. You show two CD4001 ICs when only one is needed. A single CD4001 has 4 gates inside. One...
  12. audioguru2

    Fixed current power supply 100A DC

    What are you going to use 2V at 100A for?
  13. audioguru2

    Vocal Remover Circuit

    Vocals in a recording are usually on both stereo channels at the same level (in mono). A vocal remover circuit adds the frequencies of voices from the other channel out-of-phase so it cancels the same signal in the channel that is in-phase. When music is normally different on each stereo channel...
  14. audioguru2

    How can I make a guitar fuzz effect

    Have you ever seen a guitar preamp that uses an inverting opamp with a 1k input impedance? As I said earlier, many have a non-inverting opamp circuit with a high input impedance of 1M and some have 10M.
  15. audioguru2

    Can Transistor serve as rectifier

    You could probably use the collector-base junction of a transistor as a rectifier diode and its max voltage, max current and max power dissipation are listed on the datasheet. But avoid using the emitter-base junction because it has avalanche breakdown (like a zener diode) with a reverse voltage...
  16. audioguru2

    component

    Those old parts were made and sold about 20 or 30 years ago. I don't know anywhere that would still have a few. I don't have a list of modern substitutes.
  17. audioguru2

    5A regulated power supply

    National Semiconductor invented the LM317 adjustable regulator. In their datasheet for it they show how to increase its output current a few different ways.
  18. audioguru2

    Tank ckt

    Hi Kevin, Welcome back. ;D The impedance of a tank circuit at resonance is determined by its Q. Usually it is the inductor's resistance that reduces the tank's Q. Therefore an inductor with a lower reactance would have a lower resistance then the tank would have a higher Q and a higher...
  19. audioguru2

    How can I make a guitar fuzz effect

  20. audioguru2

    need the function generator circuit

    I don't know why your teacher doesn't teach about function generators, and doesn't even show you how to look for them in Google. There are thousands of articles about them and their datasheets are in Google...
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