Here is a simple stereo headphone mixer that can be used for monitoring and mixing 2 sources. A very helpful device for online streaming. How? For example you are playing a keyboard on a band in an online stream and using a headphone as monitor. You can use this to mix the headphone output of you keyboard and headphone output of the streaming mixer so you can hear more of your keyboard.Continue reading “4Ch Mini Stereo Headphone Mixer”
If you are looking to control your audio with arduino, here’s it is. It uses TDA7419 chip which has a lot of features for controlling your audio. It has 4 input selector, bass control, mid control, treble control, loudness control and a built-in 7 band spectrum analyzer.Continue reading “Arduino controlled bass mid treble and input selector with tda7419”
In this new normal, most people shift to online content like seminars, meetings and specially churches.
Here is my current project designed to give you better audio for online streaming. It is basically a link to your analog mixer to your computer. It is also known as USB audio interface. What made it different to other products in the market is the integration of sliding fader for better volume control. For church online streaming, you have big volume difference between the band performing and the pastor preaching, the sliding fader makes it easy for such volume adjustments.Continue reading “Cheap DIY USB Audio interface for online streaming”
Here is a simple stereo mixer for you that can be easily built. You can mix 2 stereo sources.
About the Circuit
The Circuit is simple and uses only 1 opamp. This can be powered by a 12V DC or a 9V battery.Continue reading “Simple stereo mixer”
In the world of electronics, nothing is created equal. This is also applicable to batteries. A 10AH (ampere-hour) rated battery is not exactly 10AH in actual. This variation on capacity is a big problem when connecting battery in series because the battery with least capacity will be the first to full charge and full discharge. This is where you need a battery balancing circuit.Continue reading “Understanding Battery Balancing – is it important?”
Solar power is a renewable energy from the sun. But there are times that is raining for several days and during those days, our solar power might not be sufficient for our needs. On this project we will create an automatic solar backup power system to automatically connect to the AC grid when the battery level gets very low.Continue reading “DIY Simple Cheap Automatic Solar backup power system for 12V System”
Here’s a simple 2.1 channel amplifier for you home. it uses TI 20W LM1875 amplifier chip. It uses 4 of it so it can produce a total of 80W. It can output up to 30W with a bit higher THD. Maximum attainable power is 120W total.Continue reading “LM1875 120W(30W+30W+60W) 2.1 channel amplifier | Cheap and easy to build”
Out of curiosity, I tear-down this iRig audio interface that I used sometimes to record my guitar solo. I didn’t expect the circuit to be complex since this device is cheap (must be fake), only cost around $3.Continue reading “iRig Audio interface tear-down”
Build this simple 2 band tone control Circuit using transistor with complete schematic and layout you can download.Continue reading “Simple but effective 2 Band Tone Control Circuit using transistor”
I wanted to build this project a long time ago but I have no time to do it. Today I decide to make a PCB design for it. Unfortunately I do not have any time to make the actual prototype. I will post my design so that anyone can build their own prototype.Continue reading “500W Amplifier from Eliot Sound Products”