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Can you change the width of the pulses for each coin? This might help you ID the coins.

Also do you have access to the inner parts of the coin acceptor?
There must be a coin detect device that...

Thank you Dave and Norm.
Isn’t that just “fishy”?
It looks like we got the complementary fish and learn how to fish in one strike.

Nick

You are wrong Rene.
I didn’t ask for any hand out (not for me, I’m not interested in this particular topic but I certainly admire the efforts going on and how other members are dedicating their time...

So Rene,

Are you getting closer to wrapping up your project and post it here?
It could save many members a lot of headaches and will catch everybody’s attention as a well crafted piece of code...

Using one of the modules, suggested above, parallel with the switching device and one parallel with your load and ORing the outputs of the optocouplers (preferably open collector type) you can have...

One other approach will be to do a search in this forum for “transformerless” you will find ideas of simple circuits of powering up small loads (a LED part of the optocoupler in your case) .
Use one...

Your PM box is full.
I could not reply to you but I will go ahead and PayPal you the amount later today.

Thanks again.

Nick

Some time ago I started working on a giant, three sided, garden clock but never had the chance to seriously finish the design.
This might be a good incentive to finish it and also make some use of a...

Thank you Darrel.
As usual you are the live savior.

Best Regards,

Nick

Hi All,

I’m trying to find a post, similar to LCD on any pins, which was dealing with “patching” a 16 bit port from whatever available I/O pins are there. I’ve been trying few searches but could...

Few tips and tricks I’m using:

• Keep your soldering iron tip clean all the time (use wet sponge) and re-tin the tip periodically (nothing helps better than a clean tip)
• Use a reliable...

I completely agree with Ioannis and Mackrakit that Bruce had done a lot for this project so if Bruce decides to send out kits I’m supporting it 100%.

One thing I’m not too clear is if we all...

I believe that having the board wireless ready (even if the involved parts are not populated) will be a big plus.

I am also interested on USB host feature (if possible) which might solve the well...

I'm in with 4 if is not too late.

Nick

If I understand it correctly there will be an initial load of the OS. I do not have the tools to do that but, if it comes preprogrammed or somebody can do it for me, count me in with 4.

Thanks,
...

Just in case someone needs this information here is a good place to find stereo microscopes:
http://www.carton.ca/p1micsstereoboom-dsz44.html
I’m using the one with the light for inspection...

Add a "Pause 1000" right before your "Goto fan" line.

Regards,

Nick

Hi Megahertz,

If you want the LED to blink while waiting for input you must jump to your “Main” label after the timeout. Read the Serin command for more information.

HTH

Nick

Here is a link to Maxim site:
http://datasheets.maxim-ic.com/en/ds/MAX220-MAX249.pdf

Regards,

Nick

My bad. I only got Adam’s written request: swing from positive 5V to negative 5V with no need for 0V as shown in the waveform.
There are few RS 232 chips that have control pins (EN if I’m not...

There is no need for an OPA or two PIC outputs.
One RS232 level convertor chip should do the trick. All you need to keep in mind is the inverted logic.

HTH

Nick

New test for new thread

I have the feeling that the internal zenner diodes will keep your lower side of the resistor to 5V+ even if you force it in input mode so the transistor will never turn OFF completely. Playing with...

Hi Al,

Thank you for your input.
I've been using optocouplers with good results before but had never used HCNR200 for analog I/Os. I'll give it a try.

Regards,

Nick

I have to fully agree with timmers on monitoring only the current. With a little experimenting you can define your normal operating limits and take whatever action when things go wrong.

I’m a...