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Recent Forum Posts

Re: InfraRed ramblings

I bought some of those stepper motors you linked above. Really cheap, small with a gearbox, but be aware they are wired so you cannot use them with a standard stepper driver module. These have five...
mark_s Today, 16:38

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joemealr Today, 10:40

Re: InfraRed ramblings

Thanks Mark!

I was considering laying a limit switch flat along the outer edge of the disk, and use a notch to catch the limit switch roller. But I'm liking the hall sensor even more:
- no...
Demon Today, 03:24

Re: InfraRed ramblings

You can also use a hall effect IC and a small magnet. The hall effect ic's come in a 3 pin TO-92 package and are easy to interface to your micro.

For example
...
mark_s Today, 00:16

Re: InfraRed ramblings

ARGH! That's what they're called. :D I knew these existed, I just didn't know their names.
Demon Yesterday, 22:53

Re: InfraRed ramblings

Search optical interrupter. These are used often for homing.
...
mark_s Yesterday, 18:29

Re: InfraRed ramblings

There will be minimal light leakage. These will be on either side of a disk, as close as I can get them.

I plan on putting black heatshrink over the LEDs as close as I can to the rotating disk.
...
Demon Yesterday, 03:35

Re: InfraRed ramblings

if there is any ambient light leakage a ir sensor like SEN-19018 would be better than a photo diode, with the bonus of making
led modulation unnecessary too.

if the distance between led and...
richard Yesterday, 02:54

InfraRed ramblings

Using this 940nm LED set on Amazon: https://www.amazon.ca/dp/B01HGIQ8NG

Can I have the transmitter LED on without any pulsing? (resistor values are temporary, did not do any calculations yet)
...
Demon Yesterday, 01:52

How To
Microchip Tips and Tricks
by
ScaleRobotics

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Published on - 17th June 2010 17:26 Number of Views: 12145
The link below has the most information about tips and tricks using PIC micro-controllers. The attachment is a smaller version ...

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Presetting Configuration Fuses (PIC Defines) into your Program
by
Melanie

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Published on - 20th May 2010 16:27 Number of Views: 12737
1. What are the Configuration Fuses?
2. How can I preset them in my Program?
2.a. When using MeLabs default ...

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Bits, Bytes Words and Arrays
by
Melanie

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Published on - 23rd April 2010 19:39 Number of Views: 10466
1. How can I reference a BIT in a BYTE?
2. How can I reference a BIT in a WORD?
3. How can I reference a BIT in a BYTE ARRAY?
4. How can I reference a BIT in a WORD ARRAY?
5. How can I reference a BYTE in a WORD ARRAY?
...

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I’m Running Out of CodeSpace, What Can I Do?
by
Melanie

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Published on - 23rd April 2010 19:28 Number of Views: 13389
I’m Running Out of CodeSpace, What can I do?
My progam is too slow - What can I do?

Apart from the obvious and move to a faster PIC with more program memory, there’s a few little known tricks you can try.
...

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