janw

Dec 22, 2009
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About:My hobbies are mainly music and electronics but I like to read and learn about a lot more than that.

Location:The Netherlands

Joined:Dec 22, 2009

Interests:music, electronics, woodworking

Age: 31

Gender: MALE

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Orangeboard

janw's Instructables

view all 28 Instructables »

Voltage Controlable Atari Punk Console
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Flower box made out of leftover wood
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Build your own (at)tiny colour sensor.
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USB CPU and Memory monitor
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Sticky sweet chili sauce
3,217
LED wind indicator
7,992

Comments

Orangeboard

Bot1398 says: Mar 27, 2012. 8:05 AM

Thaxx for subbing any reasons?

janw (author) in reply to Bot1398Mar 27, 2012. 8:54 AM

Because I like your instructables and you followed me.

rainbowangel says: Dec 27, 2011. 10:17 AM

do u provide the program of the pill dispenser? is it included in the pdf?also..whats the frequency of the quartz crystal to be used?
please reply as soon as possible..am a student and had taken ur version as a project because it inspired me:)
thanking you
angel

janw (author) in reply to rainbowangelDec 27, 2011. 11:11 AM

There is no program any;ore. I lost it due to a computer crash and I never wrote a new one.

The quartz crystal is 32768Hz one as specified in the datasheet of the DS1307

rainbowangel in reply to janwDec 27, 2011. 10:21 PM

thanks...is there any way i can get the program?

robot1398 says: Apr 19, 2011. 7:29 AM

my new instructable
http://www.instructables.com/id/Laser-powered-burglar-alarm/
plz vote

winsdream says: Sep 25, 2010. 6:28 AM

Hi janw,

I've a few questions to ask you regarding your medication dispenser.

1) so does it mean that each stepper motor controls 1 drum, therefore you need 7 stepper motors to control 7 drums?

2) how do you control the speed of the stepper motors?

janw (author) in reply to winsdreamSep 25, 2010. 10:11 AM

Hi winsdream,

I did use 7 stepper motors so 1 for each drum. Those are 15step stepper motors but you can use motors with more steps.

To contole the speed, I used 7 L293D-ic's (so one for each motor) in combination with the microcontroller. The microcontroller sends pulses to the L293D-ic and that one makes the motor spin 1 step for each pulse. THe delay time between the pulses is with a simple wait statement in the program.

winsdream in reply to janwSep 25, 2010. 9:45 PM

Hi janw,

Is there a simpler way to control the speed of the stepper motor? For example using Pulse Width Modulation method?
Sorry for the trouble caused because it's a student project and resources limited.
Thanks, Winsdream.

janw (author) in reply to winsdreamSep 26, 2010. 12:06 AM

You can connect the steppers directly to a microcontroller but there are some problems with that:

1) you won't have enough pins
2) the output of your microcontroller is not high enough (only 5V and a few mA) so you need something to get them to 12V and a reasonable amount of Amps.

So the easiest way I figured out was to use the 74HCT238 to select the motor (it only need 3 pins for 8 motors) and the L293D as the motor driver so that the motor runs on 12V

doctorbee says: Jun 8, 2010. 6:34 PM

Hi janw, I was wondering how much did your medication dispenser cost? Also--have you patented your design? It could be amazingly beneficial to the senior community. Thanks, db

janw (author) in reply to doctorbeeJun 8, 2010. 10:57 PM

It costed me about 40Euro so thats not very expensive.

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