Solar powered devices are getting more and more popular these days. It is renewable and Eco-friendly kind of energy. One on the most popular application of solar power is the solar powered street lights. I made a very simple schematic of a solar powered light that can charge and turn on the light automatically.
Adding Rotary encoder and a button to arduino
This is from my latest project arduino-controlled-bass-treble-volume-and-input-selector. I only created a separate thread for the rotary encoder and button part just in case you only needed that part on your project.
Continue reading “Adding Rotary encoder and a button to arduino”
Kicad Vs Eagle PCB
I have been using the Eagle PCB for quite some time now for my PCB designs. It is very easy to use and there are many libraries and projects that can be downloaded on the internet. But due to some changes on eagle that made recently, I decided to switch and look for better alternative. Upon searching, I found this software called Kicad. It seems promising, feature packed and best of all its free!
Arduino Controlled Bass Treble Volume and input Selector
Last time I have posted about how to control the LC75341 IC using arduino nano. And I also posted about how to modify the bass response of the LC75341 IC. This time I will be building a home amplifier for my TV, it will also feature a bluetooth reciever so that I can play via my phone.
Continue reading “Arduino Controlled Bass Treble Volume and input Selector”
LC75341 Bass response modifications
Last time I have a blog post regarding on how to control the LC75341 tone control using arduino. I never really tested the performance of that IC until recently I got time to play with it. My initial impression was not good. The bass sound seems very thin and I can’t get the “boomy bass” sound that I wanted. Maybe its just me but the bass sound is thin compared to my little JBL flip bluetooth speaker. By the the way, the kit was from E-Gizmo’s digitally controlled tone control. I have investigated and model the circuit of the LC75341 tone control for simulation and the simulation results confirm what I am hearing.
Simple Mic Mixer
Here’s a simple audio mixer circuit that you can use to connect up to 4 mics on your amplifier. The potentiometers or volume controls are not part of the PCB to make it smaller.
2.1 channel crossover circuit
2.1 Channel audio systems are so popular on most home sound system with low power output(usually below 50W). It only composed of left, right and a subwoofer speaker. The signal from the subwoofer is derived from both channels and filtered to output only the low frequency usually below 200Hz. Since the low frequencies are being produced by the subwoofer, it should be cut off on the main speaker.
DC Controlled Tone control
Here is another simple stereo tone control circuit. What makes it simple is that is uses a DC controlled tone control IC LM1036. The potentiometer act like a variable voltage divider and the output is fed to the IC that controls the level of Bass, Treble, Volume and Balance.
5 Band Equalizer Design
Here is a relatively simple 5 band equalizer that uses an IC LA3600 especially made for 5 band equalizer application. It has a relatively simple circuit that is easy for PCB layout. LA3600 make it easy to build your own 5 band equalizer with relatively few components. It will also be easier to design a single PCB since it only have very few components.
3 band tone control design
The tone control i posted last time was simple with only bass and treble control. it is also a mono circuit, you need to build two pcb to make it stereo. Now let’s build a little more complicated, a stereo tone control with mid control. If you haven’t tried building any PCB, I suggest try first the more simple tone control circuit. I will also include the simulation file just in case you want to change the response of the circuit.