Not gonna lie to you, I fucking love it. What about CMOS?, I believe that when students understand CMOS well they stop struggling with the first part of digital circuits.
Cool! How is your NOR working on just one device without diodes? As I assume you’re sharing a pin on this but don’t you risk both input LEDs lighting when one button is pressed? Be interesting to know the solution.
Again really cool idea, it’s fun to think about how it works even from a more informed position than GCSE level.
It’s kind of interesting that these operations are so basic when you write them out in words, but still rather difficult for folks to understand when they’re presented as a machine that performs them.
If the purpose of this is to demonstrate how transistors create gates (and if it’s not, why not just use 74-series logic ICs?), might I suggest clear solder mask so one can see how the transistors are connected? From the top of this board I don’t get a sense of how anything is connected inside the gate symbols.
I probably would have silk screened over the traces, to show the electronical functioning as well.. But that would probably be overkill for your purpose of teaching logic.
A logic gate learning board I made for my students, if you want the Gerber files check the video for it here https://www.youtube.com/watch?v=guKTWBAm1fQ
Very nice!
Not gonna lie to you, I fucking love it.
What about CMOS?, I believe that when students understand CMOS well they stop struggling with the first part of digital circuits.
Cool! How is your NOR working on just one device without diodes? As I assume you’re sharing a pin on this but don’t you risk both input LEDs lighting when one button is pressed? Be interesting to know the solution.
Again really cool idea, it’s fun to think about how it works even from a more informed position than GCSE level.
* AND = Both inputs
* OR = Either inputs
* NOT = What input isn’t.
* NAND = Opposite of AND.
* NOR = Opposite of OR.
* XOR = One or the other, not both.
Now a days, we’d just use an IC.
It’s kind of interesting that these operations are so basic when you write them out in words, but still rather difficult for folks to understand when they’re presented as a machine that performs them.
If the purpose of this is to demonstrate how transistors create gates (and if it’s not, why not just use 74-series logic ICs?), might I suggest clear solder mask so one can see how the transistors are connected? From the top of this board I don’t get a sense of how anything is connected inside the gate symbols.
I absolutely love this.
Hey, I’m named after that type of transistor (here on Reddit)!
Always good to see people teaching about electronics!
“computer engineering for babies” but smaller and cheaper
Many people asked me what’s the problem with XOR and why do I sometimes talk about “xor accelerators”. I guess that would be quite a reply.
It’s really cool.
I probably would have silk screened over the traces, to show the electronical functioning as well.. But that would probably be overkill for your purpose of teaching logic.
Can I buy one? 😃
This would have saved me a lot of stress in college!
Awesome project!
This is awesome!!
This made me mad I hadn’t thought of it first
Good stuff, OP. Now I have to see if I can design a 5-BJT XOR gate without peeking at your work!