I bought capacitors of 22kµ instead of 2.2kµ. I was wondering whetther this circuit could still work with the 22kµ and what the effect is on the circuit.
I'm not a electrical engineer so my knowledge is rather limited in this field. My best guess would be that these are used for the...
I am trying to setup my Sony N500 Xplod Car Amplifier in home environment. I have presently a 20A fuse placed in a 25A socket of the Amplifier. Its input is 12V. So I believe a SMPS of 25A 12V will suffice its working. I am intending to change the 20A fuse to 25A as well to support...
I'm trying to modding HackRF one rtl-sdr card, regarding this articles card have problem with tx bellow 100 MHz, lots of user complains about burning card, precisely MGA-81563 chip, I already burn once MGA-81563, and I replaces two of them. Someone suggest LVA-123+, but pins construction are not...
I'm trying to detect the source of the problem and hope you can help me to where should i look for it.
So when I'm raising the volume on the amplifier the hum gets more quiet then if its 0 volume.(Without any input, just the speaker connected)
It's not ground loop probably. Already checked.
I really need your help
I need a circuit to change amp of Pwm
Input : pwm 12V 5Amp
Output: pwm 12V amp between 15-50 amp
I have to say I don't know programming or program any type of IC
I know I have to pay money for design a circuit like thus, but I live in Iran we can't and don't let...
I have bought a headphone amplifier which I have made small changes to. The two things I've done is:
- disconnect the on-off button by soldering a cable between the poles
- adding longer wires to the diode so that the led could be attached a bit from the amplifier
What have happend...
So here's the circuit:
I think M2 is a common source amplifier and M4 a common gate amplifier, so they form a cascode amplifier where the gain is given by : Av = -gm2 * r0, r0 is the impedance at the node where the drain of the common gate amplifier is at (Vop).
r0 = ( [rds8 // (rds2a * (...
My requirement is to connect an additional light in parallel to my car's interior cabin light. My car supports upto 10w and I already have a 2W LED bulb inside, and the additional light is about 25W, so connecting it directly is not an option.
So I connected a 12v relay with the signal...
I'm trying to use this board as an analog lock-in amplifier; however, I'm running into some difficulties due to a lack of any documentation on the use of this device in lock-in experiments, save for PhysicsOpenLab blog post that performs the experiment I'm trying to replicate...
Hello Everyone again,
I have a continuation from my previous problem from my adjustments and testing that I was hoping to get help on. I am doing a multi channel mixer that pipes audio signals to different channels to go to different speakers. My previous post have pointed me to fixing the...
I tried to make a preamp circuit but I'm not getting any output at all. The simulation on LTSpice seems to work well.
The Op Amp I'm using is LMV821 datasheet
I'm using a balanced dynamic microphone
Zener Diode is 5V1.
I don't mind if its noisy as long as I get a some sort of amplification from...
I have done calculations for designing a differential amplifier (DA) with differential output. I simulate (using cadence ) the DA with the calculated values and perform the DC analysis of the circuit to inquire all the transistors are operating in saturation. However, I did not get all...
Hi, I just have solved one of the bjt common emitter question below.
However, I'm curious that how can I additionally find those things below:
1) Input and Output Impedance
2) AC Gain
Here is the example and my hand draw solution. However, the question only asked to find Vout/Vin...
I bought DIY amplifier board.
And now I am trying to find what I did wrong. It can work for about 2 seconds and then sound dissappear.
But power stays on, and LED is glowing
I connected 24 volt toroid to start the board. In description it says that circuit is designed for 12 to 36 AC...
I have a 807 vacuum tube and I want to make a CW RF amplifier with it. I am thinking of using transistors in pre amplifier and 807 as final power amp. I have only one tube so I cannot make push pull amp. First of all I need to know if it will be possible to make such RF amplifier. If...
Hello, I have a 1980 Peavey Centurion Mark III head that was buried in my garage unused for 15 years.
I knew it had problems (it's not mine, i got it from a friend who was throwing it) so before doing something i checked all the components and everything looked great.
Once done I plugged it to...