Instructables
loading
loading
Picture of Automatic Blind Opener
http://contraptionmaker.info
We live in a 150 year old farm house with the original windows. Despite insulation and new siding, it is like living in a sieve, in the winter time . To combat this problem we install plastic over the windows to try and stop the drafts. This has to be installed on the inside or the winter winds will just tear it up. I built this contraption to open and close out blinds in the winter time.

 
Remove these adsRemove these ads by Signing Up

Step 1: The Power Source

Picture of The Power Source
P1010005.JPG
I started with a Black and Decker $10 drill/screwdriver. I tried several different motors but none of them had enough torque to turn the shaft to open the blind.

Step 2: The Rest of the Parts

Picture of The Rest of the Parts
These are the parts I will use to modify the drill into a powered blind opener.
1. A 6 volt power adapter (wall wart)
2. LED assembly
3. A small project box
4. Power Jack
5. Power Plug
6. Batteries

Step 3: Disassembly

Picture of Disassembly
P1010013.JPG
P1010012.JPG
The first step was to remove the handle from the motor. Be careful doing this as you dont want to cut the wires yet. Cut as close to the body as possible.

Step 4: The Switch

Picture of The Switch
P1010014.JPG
P1010022.JPG
After removing the handle, seperate it, and remove the switch. We will extend the wires and use this to control the opener. All this switch really does is reverse the polarity of the DC current. Unsolder the motor and the battery connector from the pcb.

Step 5: Preparing the Motor

Picture of Preparing the Motor
P1010037.JPG
P1010038.JPG
This is the power end of the driver. The motor is just visible. We need to make the cut area as flat as possible to secure it to the wooden block used to mount it.

Step 6: Back-up Power

Picture of Back-up Power
P1010017.JPG
P1010018.JPG
The next step is to prepare the batteries for back-up power. I retained the batteries because living in the country, we do do lose power once in a while. This will allow us to still open the blinds if the power fails.

*** A word of caution: If you must solder batteries you have to be very careful. To much heat can cause batteries to explode.***

Step 7: Building the Switch Box

Picture of Building the Switch Box
P1010025.JPG
P1010027.JPG
First fit the switch in the box then cut a hole in the lid to fit the switch.
Alcreion6 years ago
dont you think youd break the blinds if you hold one of the buttons too long?
One way to deal with that may be to use a limiting switch that would stop the motor once the blinds is fully open or closed.
Depends on the torque of the motor you're using;

A lot of torque = potentially break the blinds
Not a lot of torque = potentially burn out the motor.

I'd just not hold the button too long.
At a auction i bought a box of motor from a car for £2 (About $4) and it has a Car window Opener motor thing It slides a Little plastic piece on a bar I was thinking of sticking it At the top of my Window and putting some cloth over my window and making a sorta Electronic Curtain opener
Solderguy6 years ago
You could have gone to radioshack and gotten an AA battery case, so you wouldn't have to tape the batteries together.
ContraptionMaker (author)  Solderguy6 years ago
Ya I did think of that but it would not fit in my project box.
You could probably use a rubber rod to transfer the torque. This way, if you ran the drill for just a little too long, the rubber could just twist a little instead of the blind mechanism breaking. Also, to avoid soldering, you can get those little plastic battery holders that hold 4 AA batteries. They're quite cheap.
NachoMahma6 years ago
. Great job.
. !http://contraptionmaker.info = This site is currently unavailable.
ContraptionMaker (author)  NachoMahma6 years ago
Sorry, will be back online within the hour
lemonie6 years ago
I like it. And "If you are the owner of this site (contraptionmaker.info), please contact us at 1-480-505-8855 at your earliest convenience" L