Electronics > Projects, Designs, and Technical Stuff

Playable electronic modules - modules in action

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HendriXML:
Did some poking on 20x40 pins, thus 8000  :-+ to check how many where useless, against how many are just LQ. About 35 pins where without contacts.

They where 3,30 € in total. Don’t know how much the HQ ones should cost, but I will check them out.

I’m thinking of buying less AliExpress stuff. But with Mouser it can sometimes be a bit overwhelming how many there’s to choose from. And not only that, one needs to spend 50€ at once to get free shipment. That’s not to hard  ^-^, but then to forget a part is unpleasant. So I keep delaying ordering stuff over there.

However having to wait a month on crap turned pins is not pleasant either  ;).

20 years ago local electronic part stores where quite common in the Netherlands, but now only larger cities have them. For me not handy.

HendriXML:

--- Quote from: Gyro on March 09, 2019, 09:07:16 pm ---Yes sure, the LED will follow the state of the inverter input, just not the output (I guess it depends where you position them as to how much sense it makes).

--- End quote ---
I wasn’t clear on that one. The inverter will probably drive a 2N7000 to drive the led. Thus it should follow the output. I wouldn’t like to loose 10mA of driving capacity of the inverter.

HendriXML:

--- Quote from: Nusa on March 09, 2019, 08:58:10 pm ---If you've got white space on the label, put something useful on it. Such as the truth table for the operation. Or perhaps the alternate representation for the same gate. (e.g. a NAND gate is the same thing as an OR gate with inverted inputs)

--- End quote ---
I’ve been thinking about that to, it’s hard to resist. But having a truth table always in view, might delay the growth of operational knowledge.

I will exploit the power of the printed stickers later on!

For adults it easy to use abstract symbols, for kids that is something they need develop.

In the (playfull) assignments / puzzles I’ll put a few in that are about combing gates to create elementary ones. Comming to the conclusion that multiple NAND’s (with use of GND) can be used create all others.

Mortymore:
Let me add another of my 2cents

Don't loose focus.
There's been a lot of interesting input given here, but if your "contraption" is intended for kids, keep it simple.
Adding to much information or a big board... may be overwhelming for kids (starters) and demotivating.

Keep your tiles simple. But, adding to that I suggest that you write a small book with simple instructions and experiments, with schematics, some introduction to functions. On some, instigate the curiosity proposing alternate ways to achieve the same results, or add a slight complexity to it, for instance, making a mix with 2 previous experiences or something.

The building blocks should be simple and easy to read and understand, because that will be easier to visual memory, to build the circuit and to debug if necessary.
The extra information should be provided in the book, and increased as necessary.

Keep up the good work  :-+

HendriXML:
Thanks,
I’m weighing every option carefully, so any feedback is fine.

For instance I won’t make the dual function module but split it. The modules are not short circuit safe, so having a ground next to an input is to risky. Having to warn for it will influence the friendliness perception of the modules.

Will also check the effect of having (subtle) visual information on the connection type will do.
Stuff to think about would be:

* input or output
* digital or analog
* active, passive, power
The reason for this is to lessen the risk of invalid connections when non digital modules arise. (Or connecting two outputs together)

Will also use the LQ pinheaders. Thus no more deadbug style, but normal bottom PCB soldering, but without leads/pins sticking through. Will add some foam to the top of the IC to have some upward pressure from the enclosure bottom.

It is always nice to target pro level results, but it can also mean the costs will rise too much.

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