Ok, so a premise...
I have an 8"x4" piece of glass that I etched sometime last weeek and was planning to light with LEDs. However, since the etching is of a shark, (I can provide a pic to those who are curious) I thought of trying to do a lighting scheme where the LEDs slowly brightened and dimmed out of phase with eachother, in the hopes of simulating light coming through waves.
It took me a while, but evntually I found a design for a quadrature oscillator (link 1)and combined it with another design (link 2) I had found earlier in my search. I just have a few issues...lol
link 1 :http://www.angelfire.com/music2/theanalogcottage/quadratu.htm
Link 2: http://ourworld.compuserve.com/homepages/Bill_Bowden/page5.htm#eyes.gif
First big thing is I havent been able to find a way to properly calculate the values needed for the passive components for the oscilator section of the circuit. I am shooting for around .25Hz output as a starting point. The webpage metioned just having to adjust the capacitor value C.
THe values for the Resistor R, and the voltage V i am pretty sure i know how to get, though I am not 100% sure if I am using the transistors properly. the number of LEDs I am going to use hasnt been set, but I hope to have at least 8.
WHile i recently graduated with a bachelors in Electrical Engineering, lately I've had to wonder how....lol
I guess I am not asking for all the answers (unless my "design" obviously wont work ), though I am hoping for guidance on how to from this point to a functional circuit. So, if you need more information from me, please ask away.
Thanks in advance.
M.Langlais
I have an 8"x4" piece of glass that I etched sometime last weeek and was planning to light with LEDs. However, since the etching is of a shark, (I can provide a pic to those who are curious) I thought of trying to do a lighting scheme where the LEDs slowly brightened and dimmed out of phase with eachother, in the hopes of simulating light coming through waves.
It took me a while, but evntually I found a design for a quadrature oscillator (link 1)and combined it with another design (link 2) I had found earlier in my search. I just have a few issues...lol
link 1 :http://www.angelfire.com/music2/theanalogcottage/quadratu.htm
Link 2: http://ourworld.compuserve.com/homepages/Bill_Bowden/page5.htm#eyes.gif
First big thing is I havent been able to find a way to properly calculate the values needed for the passive components for the oscilator section of the circuit. I am shooting for around .25Hz output as a starting point. The webpage metioned just having to adjust the capacitor value C.
THe values for the Resistor R, and the voltage V i am pretty sure i know how to get, though I am not 100% sure if I am using the transistors properly. the number of LEDs I am going to use hasnt been set, but I hope to have at least 8.
WHile i recently graduated with a bachelors in Electrical Engineering, lately I've had to wonder how....lol
I guess I am not asking for all the answers (unless my "design" obviously wont work ), though I am hoping for guidance on how to from this point to a functional circuit. So, if you need more information from me, please ask away.
Thanks in advance.
M.Langlais
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