- I can convert SMD parts to be breadboard friendly

- I am using 5V as mentioned in the post #1
- I am now amplifying just weak signals (so result is yes/no kind), but when I will eventually start to play with audio, then BJT/OpAmps will be more appropriate
Here I made 8 LED indicators (LED+resistor+transistor as emitor follower = ~100kOhm input impedance) to fit breadboard ![]()
Here is usage:






