The TA drivers Cereal_killer mentions are here, there is a schematic in the first post. Texas Avenger "TA" Driver series - Triple channel + Bistro or Narsil + Clicky or E-switch - The Ultimate open source driver!
Here is a basic schematic for classic 8 x 7135 design: LED Driver Schematic - #15 by relic38
Another tip if you make your own “driver breadboard”: Instead of using the standard 0603 and 0805 resistor/cap pads, make your own with much bigger solder pads but keep same distance as 0603. It makes replacing those components much easier. Here I have 0603 resistors on these oversized pads:
