Here are some of my home-built breadboard modules and a PIC programmer board kit I bought.
I built most of my modules on sections of Radio Shack 276-150 multipurpose pc board cutting the board to size as needed. I also made a couple of breadboard modules by laying them out in Eagle Layout and making printed circuit boards, but It is a bit more time consuming.
I also soldered header pins to the module boards or to wires attached to the boards so they can be plugged directly into a breadboard.
I use 9 volt dc power adapters to power my 5 volt regulated breadboard modules. The modules have an on/off switch with an indicator led on the output.
The led module has an 8 pin header to monitor the output ports of a PIC chip and two ground pins to connect to the negative power strip on a breadboard.
Push Button Switch Module
The push button switch module has eight momentary contact switches with pull up resistors. When a button is pushed it pull the corresponding header pin to ground. If you reverse the power pin polarity the resistors will pull down and output will switch high.
Eight SPST Switch Module
The switch module uses an eight SPST rocker switch DIP package. When a switch is in the off position a 10K resistor pulls it's corresponding breadboard header pin to ground. When the switch is moved to the on position the header pin is switched to 5 volts.
If you reverse the polarity of the red and black module leads the resistors will pull the breadboard header pins up to 5 volts with the switches in the off position and the output will switched low when the switches are in the on position.
Dual Serial Port Module
The serial port module has DB9 connectors to connect to a computer and pins to plug into a breadboard to interface with a PIC chip. It also has a momentary button to use as a master clear reset when the blue lead is connected to the MCLR pin of the PIC chip. The heart of the module is the MAX232CPE ic.
PIC Microchip 16F876A micro controllers and accessories. PC to PIC control for Futaba S3003 servo.