Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Delaying Lid Control
Delaying Lid Control
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 17th July 2019, 07:20 PM   #1
Salar is offline Salar  Germany
diyAudio Member
Join Date: Feb 2006
Location: Germany
Default Delaying Lid Control

Hi to all,
I am working on a DIY CD-Player that is based on a BU-1 mechanism.

The casing is my own design, a toploader with motorized lid.

For this design, I cannibalize a Sony CDP-103.
What was the movement of a tray is now the movement of a lid.
Two switches signal to the mechanism contoller whether the
tray / lid is open or closed.

I am worried how to make the lid close exactly.

In many other designs, the closing movement of a tray does not
trigger the end switch. It is triggered by a following locking mechanism
that clamps the CD. And this locking mechanism is designed for
some play, so the switch does not have to be exactly triggered to shut off the
tray/locking motor.

But I am using a very stiff, gear based mechanism without any locking
So the moment when the motor shuts off has to be exact.

But this precision is only needed when closing.
When the lid is opens I do not care whether
it stops at a 40 or a 45 angle.

So I thought maybe the closing can be delayed so that the lid will
always completely close even when the trigger comes a bit too early.

First I thought of delaying the trigger signal, but this would force the motor
into short circuit everytime the lid closes.

But maybe an clectrolytic capacitor in parallel to the motor could force the delay, without stressing the circuitry.
There is not much of delay needed.

So, is my attached drawing correct? I did draw the modification by hand.
Problem is that the electrolytic capacitor has to be protected from the negative voltage when the lid opens.

So I am not sure of the placement of the diode.

The orange line carries the positive voltage for opening and
the negative voltage for closing. The chucking motor is not needed for my design
so I greyed its circuitry out. Would a capacitor + resistor parallel to a motor work as a delay?

All the best,
Attached Images
File Type: jpg Scetch.jpg (943.0 KB, 23 views)

Last edited by Salar; 17th July 2019 at 07:30 PM.
  Reply With Quote
Old 25th July 2019, 05:28 PM   #2
Salar is offline Salar  Germany
diyAudio Member
Join Date: Feb 2006
Location: Germany
No one?
  Reply With Quote


Delaying Lid ControlHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Remote control Passive Volume Control with Display ua100k Swap Meet 2 31st May 2011 03:01 PM
i need preamp schematics w/o tone control or volume control hernanstafe Parts 7 30th January 2008 03:12 AM
Help with control a Stepper motor with an IR-control. Progg70 Parts 1 17th August 2007 05:15 PM
The remote control paratactic volume control audio-gd Solid State 33 7th June 2007 11:16 PM
remote control motorised control for volume pot/knob CharlesY Parts 0 25th July 2005 11:12 AM

New To Site? Need Help?

All times are GMT. The time now is 11:07 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio