555 astable multivibrator-vary duty cycle/maintain freq

danadak

Joined Mar 10, 2018
4,057
Screen shot of right window, what it took to do the design.

upload_2019-2-10_17-28-13.png

Note there is some work to this as Arduino boards have different chips
feeding different pins resources inside part, like what pin PWM is connected
to. So one googles for schematics, etc.

But thats design, why we get paid the big bucks, resolving incomplete
documentation, instructions.....but its all good.


Regards, Dana.
 

danadak

Joined Mar 10, 2018
4,057
Yes, I am running it on 1.8.8, has to go in this directory

C:\Program Files (x86)\Arduino\tools\ArduBlockTool\tool

You have to create the last 2 elements yourself of the above path. Note
the above directory name is your install directiory for Arduino exe file,
eg. may not match mine shown above. Also typed case of path matters.

.jar executable file that has to go into that folder

http://www.canadarobotix.com/resources/code/ardublock-161216-carobot.jar


Regards, Dana
 

iONic

Joined Nov 16, 2007
1,650
Nice work danabak!
If the MIT version has more tutorial I may venture there, if not I will PM you for Ardublock.
 

djsfantasi

Joined Apr 11, 2010
6,811
Compilers, Bascom, Arduino, free, programmer could be Arduino Uno or AVR USBavr programmer.

Yes, to program a chip you do need to learn. Bascom Basic for AVR one of the
easiest, C / Arduino next.

All this is predicated by design goals. 555 timer really crappy on frequency accuracy
and stability, but then many jobs don't care if it oscillates at 1 Hz or 1 Ghz :)

Now you have MIT scratch programming in its infancy. Making a lot of progress, and a
lot of kids working with it in school.

Not only that we have routable programmable with analog micros, where your breadboard is the
micro. You control wiring, and interconnect. I was never a fan of point to point wiring on bread-
boards that were / are tedious, and contact challenged.

Change, its all mostly good.


Regards, Dana.
Here’s another programmer for the ATTiny that’s compatible with the Arduino IDE (documentation included links to the necessary libraries) that may be a better choice.

https://www.sparkfun.com/products/11801
 

Thread Starter

spuddo

Joined May 2, 2013
24
Hi , ionic,hijack all you like , this has produced a wealth of info for me---thanks
I built cct from post#17
Worked a treat with a minor tweak---33kohm between pin 7 and pot---went a bit crazy as the resistance closed in on zero.
no problems using single supply --12V
Danadak thanks heaps for you input----must pull finger and learn to program.
Thanks to all.
Kind regards
 

eetech00

Joined Jun 8, 2013
1,992
Hi , ionic,hijack all you like , this has produced a wealth of info for me---thanks
I built cct from post#17
Worked a treat with a minor tweak---33kohm between pin 7 and pot---went a bit crazy as the resistance closed in on zero.
no problems using single supply --12V
Danadak thanks heaps for you input----must pull finger and learn to program.
Thanks to all.
Kind regards
Happy it worked...:)
 
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