Hello I've been working on a project that requires a mini breadboard to be smaller scaled from this size to a tiny breadboard, here's the website Arduino | IR Breakbeam Sensors | Adafruit Learning System
Have a look here https://www.gammon.com.au/forum/?id=11109 for an example of a 328P based board with minimal components. You would need to sort out a power source for it, such as 3x AA batteries to run the micro directly.
Once the bootloader is installed, you can upload code to it exactly the same as you do for your UNO by using an external serial-USB breakout board using an FTDI chip or one of the CH340 series chips.
Depends exactly what you are asking.
Do you want to fit all the components, including the Arduino, onto one of the small PCBs you have shown ?
No I will down scale that Arduino uno to a pro micro aswell.
Thanks but this may be too complicated for me , was hoping I can simply take the wires out and put them into the tiny breadboard. Is that possible?
Then perhaps do some basic checks if the bits you are using will phisically fit on the PCBs you want to use ?
How many pins on the side of a Pro Micro ?
How many holes\rows on the PCB s?
While it’s a pretty simple circuit from the photos, it would behoove you to draw it out as a schematic - not only for us but also for your own future reference.
Yellow wires on a white background don’t carry in photos !
As there are almost no external parts or wiring, maybe a nano with an off the shelf shield (daughterboard) would work for you.
Likewise a LiPo bundle would make it portable and USB rechargeable.
I don't need them to physically fit on any pcb, they will be in a box , I need to down scale them. And an Arduino uno and this small breadboard can't fit I need to use a tiny breadboard and an pro micro my project is already working on the uno i already figured out that it will also work with the pro micro because the pro micro has enough pins for it to work. It seems the answer is no. I'm not interested in using a pcb design this is a simple hobby project.
Ok, do you have basic soldering skills?
I would advise against using a prototyping breadboard for your project beyond initial development.
The only external components are your 2 breakbeam sensors. You could solder their wires onto dupont jumper cables like these:
Chop off the male ends (the ones at the top of the image) and solder your sensors to them. You will need to solder the two red wires (+V) together and onto a jumper cable, and also the two black wires (0V) onto a second jumper cable. Then solder the sensor output onto a third jumper cable.
You should then end up with 3 cables with female ends (like the bottom of the image). These can be pushed onto the pins of your Pro Micro.
If that's too flimsy/unreliable, then the next step up in ruggedness is to mount your pro micro into a socket on a small board similar to the ones you showed in post #1, and solder the wires to the board.
I believe that the Pro Micro has 17 pins on each side, whereas those boards in post #1 only have 15 pins.