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0answers
32 views

DIY high fidelity audio using delta sigma adc

This question may be too general, but I will include all the details that I can. My end goal is to achieve a super high-resolution spectrogram of any recording I choose to make. By doing some tests I ...
0
votes
1answer
76 views

How to measure the output impedance of a valve preamp?

I was trying to measure the output impedance of a DIY preamp for the past couple of days without any luck. Each time, I got to the same result of around 3K3 ohm, which is unbelievably low. This is ...
-1
votes
1answer
144 views

DIY TDA2822N computer microphone

I am using the following circuit to make a computer microphone. The "speaker" component is the computer's microphone input. The problem with this circuit is that somehow I can hear capacitors ...
0
votes
2answers
424 views

Female mono jack connector 6.3mm

I'm building a DIY pedal effect for my electric guitar and I have to connect the input and output jack connector, but I don't know how to do it. The connectors have 3 pins, one is the tip which it is ...
1
vote
1answer
68 views

AUX input outputting +4v Causing reset of connected smartphone

I've added an AUX input to my Mercedes Audio 10 casette radio using an online tutorial. Essentially hooking up a 3.5mm jack direct to the output of the audio processor. I'm familar with this ...
1
vote
1answer
1k views

DIY car audio noise when the source device is charging from the same power source

I have a hobby in electrical engineering so I built my own car audio system given the fact that it didn't have any before. It's basically two pairs of PC speakers adapted with some resistors and ...
1
vote
3answers
4k views

DIY Multi-Input Audio

Edited, see bottom of this post. What would be the best method for preventing damage to multiple audio input devices that are connected to a home made audio patch panel? Im wanting to make a device ...
2
votes
1answer
13k views

Making a [4-Pole TRRS to 3.5mm Stereo & Mic Adapter (Male to 2x Female)] from an iphone headphone splitter jack?

I want an adapter that merges the microphone and earphone 3.5 mm jacks into a single 3.5 mm jack ( basically I want to build the blue adapter thingy): I have an earphone splitter for iphones that has ...
0
votes
1answer
79 views

Using european telephone cables for own DC power delivery

I have european telephone cables running through my walls to each room, without any connection/socket. Well... we really do not need any hard line telephone connection and I am into DIY projects, so I ...
2
votes
2answers
327 views

Google Glass 3.5mm jack with battery neck strap

I'm thinking of improving my Google Glass by DIY building a micro usb to 3.5mm headphone jack with a battery connected to a neck strap out of parts from the internet. I've already built the neck ...
-4
votes
1answer
109 views

DIY headphone preamp [closed]

I would like to make an amplifier with following specs: input from TV RCA jack output 1-2 3.5mm jacks powered by USB volume control (if possible make it somehow wireless) As i am new to electrical ...