
Just got my second RAB holder; I find them very useful when testing prototypes based on single board computers. The full size self-adhesive wireless breadboard fits snugly and the threaded tabs are molded in so you can attach the Arduino Uno and Mega boards with small mounting screws. The Raspberry Pi is also supported, although I haven't checked the alignment of the holes between the board and the header. The photo shows a real Arduino Uno (not yet connected) and a Sparkfun Thing Plus SBC paired with a Sparkfun real-time clock, an Adafruit 12-input capacitive sensor, and color TFT BOBs. The RAB holder is a stable (structurally strong with rubber feet on the bottom) and portable platform on which to build a reasonably sized prototype. Please note that the mounting screws for the SBC may not fit all Uno/RPi variants. Good price and time saver.

Gikfun Screw Shield Expansion Board: Enhance Arduino UNO R3 with the EK7007 Add-On
11 Review

π Ultimate BBC Micro bit Sensor Starter Kit: Keyestudio 37-in-1 Box with Tutorial, Compatible with V1.5 & V2, Gift for Kids and Adults (Microbit Board Not Included)
11 Review

REXQualis Comprehensive Starter Kit with Arduino MEGA 2560 & Detailed Tutorial for Arduino IDE Compatibility
11 Review

GeeekPi Raspberry Pi Cluster Case with Cooling Fan and Heatsink for Pi 4 Model B, 3 Model B+ & 3/2 Model B
11 Review