Laser Scanning Microscope from Blu-ray Player #1: Making a Laser Microphone
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- Опубликовано: 20 июн 2024
- In this video I am going to dissect a Blu-ray player to figure out how we can make a laser scanning microscope out of it. I light up the the laser and build a laser microphone as a first step.
I recommend to recreate this project with a PCB from PCBGogo:
www.pcbgogo.com/promo/DoctorVolt
Tools:
Camera: amzn.to/3kDp1BJ
USB Oscilloscope: amzn.to/3CMC7Tu
Blu-Ray player: Samsung BD-J5900 (No more made)
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0:00 Introduction
0:19 Dismantling a Blu-Ray Player
1:43 What is inside a Blu-ray player
2:27 Hacking the Blu-Ray Player
4:19 The laser system
5:21 Focus Error Signal and Laser Microphone
7:48 Outlook to the next steps 
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Great project. I would never had the idea to build a microscope from a blue-ray player optic. Just phenomenal.
The moment I heard your accent I knew this video was going to be good.
It's such a pity.... so many products contain really powerful SOCs... but because of the lack of documentation, all we can do is throw them away... we could have some lovely free microcontrollers.... if only....
Another awesome project, Keep up the great work, I look forward to the next video.
I'm so amazed at your skills in reverse engineering this DVD player. I'm glad I stumbled across your channel when looking for a DIY microscope. New sub now.
Great project, you can find more helpful information on [Updated! DIY AFM (Atomic Force Microscope)] Instructable. The article was published by Edwin Hwa.
I was able to hack into old DVD burners from vintage PC since the documentation is available for them.
Cheers
Using piezos is an interesting approach. Thanks for sharing.
wonderful job, can't wait to see your next part
Love your great videos!! Looking forward towards your next video! Thanks for sharing
Wow amazing. I wish I knew how to make basic circuits
That was a great video
Amazing
Funny project. You are recreating a measurement system that had been on the market for industrial 3D surface scans more the 25 years ago. Back than optics from a cd-player were used. Accuracy lateral better 1 micron, height better than 0,1 micron.
COOL!!!!!!!!!!!!!
Amazing reverse enegeering..!
@2:27 WOW!!! Thank you very much PCB CAD operators for including this DATA about the connector !!!
I'm doing this same project. From what I've seen online, the stepper motor isn't precise enough to get fine details, so most people use another VCM for the other axis.
Currently I get a resolution of 127x127
@@DoctorVolt Across the entire scan area?
Yes scan area is less than 1x1 mm and pictures look smoothly and not distorted at all, as you will see in part 2 which will be online tomorrow.
hi great project indeed, How did you find the schematics on internet ? it is quite hard for me to find the sf-bd415 which seems similar to yours
Simple Google-search and luck.
Did you use the opamps for any particular reason? Could you just hook those inputs to the MCU pins and handle the logic that way? Or is there amplification happening too? I would like to use this method to simply measure small distances with high accuracy
Yes, because there is only very little change of the output voltage. So it makes sense to amplify it to make use of the full AD converter range.
Sir, very good job. Can you ask, how can you find A, B, C and D pins of PDIC pins? On my CD/DVD/Blue-ray PDIC has 15 pins, 12 and 14 pins. Can't search any information. Thank you for your time.
Maybe tracing the signals with an oscilloscope while the device is reading a DVD. I was lucky because with my Blu-ray player it was printed on the circuit board.
@@DoctorVolt . thanks for answer. Can you help me - how to identify plus and minus supplying voltage? Itryed your plan, but i dont know, how to connect a power supply(
The OPU must be built into the player. Then it should be easy to find out more. If not, I see no way.
Is there any reason the PDIC could not have been rotated 90° on the threaded rod and stepper motor configuration so that the platform with the specimen does not have to move
The platform has to move in any case, because there is only one voice coil for one direction.
Hey man is there a way to contact you and ask you questions? maybe discord or something?