janw
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How can I mix colors in a rgb-led with only 2 PWM channels? (using atTiny13)? Asked in Technology 2 years ago  |
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» It is possible. Lots of practice - instruments for kids are made of plastics these days. Only the…
» You can try to scan the buttons with a multiplex system. That would use approx. 2 ports on a micr…
» Nixies run on about 170V DC. If you are not used to that kind of Voltages, you can better start w…
» Stupid questions do not exist, only stupid answers.
» A clockworkmotor is noting else than a spring that releases its tension thru a set of gears. To m…
» For a slideshow: click submit instructable on the upper right corner of your screen and the choos…
» If you want a really good material to work with look for alucobond or dibond. It is a sheet of po…
» Try books like 'electronics for dummies', they start simple covering all the basics and come with…
» You can try to scan the buttons with a multiplex system. That would use approx. 2 ports on a micr…
» Nixies run on about 170V DC. If you are not used to that kind of Voltages, you can better start w…
» Stupid questions do not exist, only stupid answers.
» A clockworkmotor is noting else than a spring that releases its tension thru a set of gears. To m…
» For a slideshow: click submit instructable on the upper right corner of your screen and the choos…
» If you want a really good material to work with look for alucobond or dibond. It is a sheet of po…
» Try books like 'electronics for dummies', they start simple covering all the basics and come with…
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Gift exchange :)
posted 1 year ago
in Events
Comments 1-10 of 213(view all)
» The order is correct as you mentioned it.
» Ik gebruik 3 verschillende methodes afhankelijk van het project: Als het een project i…
» Pin Connection: 1 common 2 right hand deciamal point 3 Segment (b) 4 Segment (c) …
» should be doable and then make them twinkle
» Thanks. But remember that English isn't my mother tongue. It is only my 3th language (o…
» This is a really great idea and build! Also it is a super clear i'ble. Congrats. Thi…
» I love clocks and I like the idea that you use for your time measurement. You got a vote!
» Nice little project! Maybe you should use 10 leds. Then every led is 10% processor load.
» Very nice design! I like it.
» This looks very very cool!I like the fact that it uses a lot of recycled materials.
» Ik gebruik 3 verschillende methodes afhankelijk van het project: Als het een project i…
» Pin Connection: 1 common 2 right hand deciamal point 3 Segment (b) 4 Segment (c) …
» should be doable and then make them twinkle
» Thanks. But remember that English isn't my mother tongue. It is only my 3th language (o…
» This is a really great idea and build! Also it is a super clear i'ble. Congrats. Thi…
» I love clocks and I like the idea that you use for your time measurement. You got a vote!
» Nice little project! Maybe you should use 10 leds. Then every led is 10% processor load.
» Very nice design! I like it.
» This looks very very cool!I like the fact that it uses a lot of recycled materials.
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Because I like your instructables and you followed me.
Dec 27, 2011. 10:17 AMrainbowangel
says:
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
please reply as soon as possible..am a student and had taken ur version as a project because it inspired me:)
thanking you
angel
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
The quartz crystal is 32768Hz one as specified in the datasheet of the DS1307
Apr 19, 2011. 7:29 AMrobot1398
says:
my new instructable
http://www.instructables.com/id/Laser-powered-burglar-alarm/
plz vote
http://www.instructables.com/id/Laser-powered-burglar-alarm/
plz vote
Sep 25, 2010. 6:28 AMwinsdream
says:
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?
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?
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.
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.
Sep 25, 2010. 9:45 PMwinsdream
says:
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.
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.
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
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
Jun 8, 2010. 6:34 PMdoctorbee
says:
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
It costed me about 40Euro so thats not very expensive.
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