Monday, October 31, 2016

Moving average Digital Filter implementation TI TMS320 DSP

In post , i am going to show you how to implement the simplest possible digital filter "moving average filter". though it is very easy to implement but still in many applications this is more than good enough. for example reducing random noise from signal. ofcourse when it is very simple it does have issues like , it does no have very sharp filter Response.
Channel 1 input , sweep from 20Hz to 6Khz, Channel 4(Green) 15 point filtered output, M (Red) output in freq domain

Saturday, October 1, 2016

Solar LED Light ,20000mah Li-ion battery , 24V solar panel with MPPT charge Controller

This project is the final part in Making a really powerful Solar Light , in this project we intigrate LTC3478 Based philips lumileds Driver and BQ24650 Based MPPT Solar Li-Ion charge Controller.
We will be using total 3 9 Watt each LED Driver boards and One charge controller to charge 6 Cell 7.6V 20000mah li-lion battery,

There is 4 LED bar graph display to show estimate battery level and a single button to control On/off, Different Level of Brightness , and Select one , all or few of LED boards to litup.
there is not much to describe in term of schmeatic and firmware as all the Firmware and Schmeatic aer already on my github account.User interface panel is made out of PCB with 4 battery status LED a port for solar panel Connector and a control switch.
when battery is chargin LED status displayed accordingly and when battery is discharging led status updated accordingly.