Download pdf - LED Color Organ - MIT...LM7812 array with BIG heatsinks Band Pass Filter Array Amplification 12V Audio L+R Adder Input Audio passthrough 00 GND +12 LED17R22 GÑD OP7A ll.GND GND 555

Transcript

LED Color OrganMark Vrablic
What is a Color Organ?
What is a Color Organ?
What is a Color Organ?
Modern day Color Organ
Why do I want to make one?
Block Diagram
Band-pass filtering,rectification, and smoothing
Why use a ramp?

Band Voltage

Ramp
Generating a ramp

Ramp Output
How to build a 15PDT switch
How to build a 15PDT switch
Crude power supplyProblem:

•Need to source peak 12V@0-10A

Solution:

•Rectify Two 18V Transformers

•Use 5 LM7812s with big heatsinks
TimelineWeek of Lab Goal PCB Goal

4/1 Proposal and initial design

4/8 Combine Audio, Band pass filters (1 channel)

Initial schematic

4/15 Ramp Generator, comparator, order parts

Finalize schematic, begin layout

4/22 Build power supply Finish layout and submit for manufacture

4/29 Debug Build PCB
Questions?

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