When you get more experience, it won't make a significant difference.

Something like this looks like it would be a nightmare to troubleshoot.

I think of it in three stages: breadboard setup, prototype board, and PCB board. I use a breadboard when I’m still experimenting, testing ideas, or learning it’s quick to change and perfect for trying different connections. A prototype board comes next when the circuit is mostly finalized but I want something sturdier and less likely to have loose connections; it’s also good for longer-term testing. A PCB board is for the final stage, when the design is confirmed and I want a permanent, reliable solution

 

Today, I suppose that I would use C instead of ASM.
For programming, I use the Atmel Studio 7 and AVR Pocket programmer.

I’m using Microchip Studio along with a USBasp programmer to load code into the AVR, and I’ll be working in C. For now, I’m keeping the hardware on a breadboard, so I’d be happy to work under your guidance and learn from your experience. I’ve already received the suggestions I was looking for from experienced members in this thread, so my next step is to focus on coding which is my main goal from the start.

 

Wendy's Protoboard Circuits Cookbook


I prefer to make my own.
https://www.amazon.com/dp/B07CJYSL2T?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_3

 

Hi Emb,
I would repeat what has been posted earlier, the boards must have power rail decoupling capacitors.
eg: 100nF and 100uF

Adding an LED and series resistor across the power rails is a simple way of indicating the board is being powered.

E

 

I would repeat what has been posted earlier, the boards must have power rail decoupling capacitors.
eg: 100nF and 100uF

Perhaps you missed my posts #9 and #11

I already have two decoupling capacitors in my setup: a 0.1 µF ceramic placed close to the MCU’s VCC and GND pins.

 

Hi,
The LED/Resistor I mentioned can also be used as a probe to determine if an MCU pin is being switched and the program is running, etc.
E

 

i don't recall last time i touched breadboard but wouldn't it be nice to have power rail through the middle? i mean breadboards have been around for half a century and nothing has changed. and all digital logic from that era used to be on PCBs where power rails run under the ICs. someone else must have thought of it already: