Thread replies: 7
Thread images: 1
Thread images: 1
Anonymous
Transistor AND Gate Help 2017-06-27 05:07:32 Post No. 338261
[Report] Image search: [Google]
Transistor AND Gate Help 2017-06-27 05:07:32 Post No. 338261
[Report] Image search: [Google]
File: schemeit-project.png (11KB, 314x305px) Image search:
[Google]
11KB, 314x305px
Why doesn't the circuit depicted in the diagram work? I know it has to do something with the use of the voltage divider, but other than that, I don't know.
I wanted the voltage divider to cut the voltage in half, because the lamp runs off of about 4.5V and I was thinking of using a 9V batter later. What would be another simple way to drop down the voltage?
Basically I decided to try and make some logic gates (and eventually an 8-bit adder) out of some components lying around. If it wasn't obvious from my very crude schematic, I only understanding the most basic fundamentals of electronics.
Thanks for the help!
>>
>>338261
> I only understanding
I also only have the most basic understanding of the English language.
>>
doesnt one of those transistors needs have the and emitter and collector reversed/rotaded?
>>
>>338270
I don't think so. Most AND gate diagrams I've seen have the transistors oriented this way.
Plus the AND gate works that way, just without the voltage divider.
>>
oh its to emulate an and gate, i didnt read the thread very well (not even the the title), i thought you wanted to clamp voltages, silly me
>i=v/r
is 1ma enough to light the lamp?
>>
>>338315
no, it needs about 70.
I figured that it wasn't getting enough current, but I don't know why. And I never know where to apply ohm's law, as I said, I don't really have a firm grasp of this stuff. Trying to learn more about this stuff is one of the goals of this project.
>>
So, you need to run the lamp from 4.5V?
Why not to calculate suitable resistor for it, or put two lamps in series?
Also, I would recommend you to learn electronics basics...
Thread posts: 7
Thread images: 1
Thread images: 1