Edit: I made it and it works like a charm :D . Only had to connect the switch -ve to the -ve lane and the switch +ve to the +ve lane (not shown in schematic!!) and the circuit works like a chram. I also found that removing the resistors connected to the LEDs helps by makeing them glow brighter. I guess the ICs take the voltage down a fair bit) thank you all for helping! This is my physics project for this term, and I want to know if my schematic would work.
However, I'd like to supply a little background first - I'm an 11th grader who doesn't know much about circuits, and definitely nothing about ICs (our sessions start in April and we have a summer break in MAY so, we haven't covered electricity as part of our syllabus.) I decided to do my project on logic gates, despite it really being a 12th grade topic, and I need a little help putting together the demonstration. This also says I won't understand any fancy terms you might throw my way. Im familiar with BASIC circuits and Ohm's law and a few of the relations (that don't really matter here) but I don't know network theorems and so on.
I've failed 3 times so this time, I'm planning properly, with a proper schematic. I haven't yet put any of it together, since I don't want to screw it up - it's really hard de-soldering a board. I somehow managed once, don't wan't to go through the hell again. Here is an inventory of all I have at my disposal. I really can't get anything else, unless its really cheap, it takes me forever to get to the shop and I have a lot of tests coming up.
- A soldering iron
- Soldering flux
- Several 100ohm resistors (about 15, I think)
- Several LEDs (again around 10)
- One 9V battery
- One 6V (4 AA's in series) battery
- ICs (NOT, AND, OR, NOR, XOR, XNOR, NAND, NOT) and their datasheets.
- A "multipurpose" IC board (a protoboard?)
- Wire (NOT insulated, the insulated stuff is just TOO thick for the circuit)
- IC sockets (so I can make basic circuits and change the IC in just their holders to demonstrate different ones without having to make a lot of circuits, only the minimum 3 as all gates except NOT and NOR have the same input and output pins)
- 2x 3-state switches (logic 1, logic 0 and off). Model - 25139 NAB
As stated above, I have to make this work with only this stuff.
So here is the schematic, and it has one question and I think all of the necessary data.
All I need to do is show the output (but the glowing or not glowing LEDs) depending on the A and B input.
If the photo isn't visible, here is a better one. EDIT #1: at any given point of time, only ONE logic gate will be plugged in. EDIT #2: The schematic will feature a wire running from the switch to the ground(battery -ve).(Not shown in current schematic)