CGS breadboard

CGS124 is the CGS breadboard a module prototyping PCB.

Construction
Color legend (assuming +/-15 volts).
 * Red: +15 volts
 * Green: 0 volts/ground
 * Pink: +5 volts. Note that pin 16 of the SO-16 is preconnected to the +5 bus.
 * Orange: Free bus. Use it for clock signals or something else that you wish to distribute along the length of the PCB.
 * Blue: -15 volts

The board can be used with either +/-12 volts or +/-15 volts, although the power connectors used are usually associated with +/15 volts.

On the rear of the PCB are various surface mount pads. These are to allow connection to the rails and IC pins under the SMT packages. There are also four pads associated with decoupling capacitors, allowing 1206 SMT decoupling capacitors to be used in these locations.

There are several power supply configurations possible with the board. Of note is the two variants of +5.
 * If you have a power bus that uses the MOTM standard for +/-15/+5, you can install a six pin 0.156 header, three Ferrite beads and three 10uF decoupling capacitors.
 * If you only have +/-12 volt or +/-15 volt power available, install a four pin 0.156 header, two Ferrite beads, two 10uF decoupling capacitors, two 100n capacitors and a 78M05 (or similar) regulator. Refer to the photographs for component positioning.

Parts list
This is a guide only. Parts needed will vary with individual constructor's needs.

CC-BY-NC
Readers are permitted to construct these circuits for their own personal use only. Ken Stone retains all rights to his work.

Suppliers

 * CGS124 Breadboard/Prototyping Board, Elby Designs