David Griffith

If you ever wonder where that big list of standard footprints is, it's here.

Stable Gschem Schematic Symbols

These symbols were created for past projects and are considered reliable.

Power

• 2.2 volts positive
• 2.2 volts negative
• 3 volts positive
• 3 volts negative
• 8 volts positive
• 8 volts negative
• 15 volts positive
• 15 volts negative
• 920 volts positive
• 920 volts negative

Semiconductors

• SN75150 dual line driver
• SN75154 quad line receiver
• 74590 8-bit binary counter
• lm7808 8V+ voltage regulator
• MOS 6581 SID sound chip
• Atari POKEY sound chip
• 16v8 programmable logic
• 20v8 programmable logic

Switches

• 4PDT Quad Two-Way Switch
• 4PDT Quad Two-Way Switch (slots)

Title Blocks

• A titleblock that doesn't crowd the workspace.

Misc

• A basic ammeter
• A basic voltmeter
• Xicon 42TM series transformers

Probationary Gschem Schematic Symbols

These symbols are being used in the first project for which they were made, and therefore may change without notice.

Semiconductors

• 2n4091 N-Channel JFET
• 2n4126 PNP general purpose amplifier transistor
• 2n4124 NPN general purpose amplifier transistor
• 8-bit, high speed multiplying D/A converter
• LM13700 Dual Operational Transconductance Amplifier with Linearizing Diodes and Buffers
• TL084 JFET-Input Opamp
• Dual Channel Video Driver with Integrated Filters and Composite Video Summer

Switches

• Electroswitch 3P4T Rotary Switch

Stable PCB Footprints

Probationary PCB Footprints

Bourns 3266 and 3296 series trimming resistors

The following script will generate footprints for all varieties of Bourns 3266 series trimmer potentiometers.

• bourns_3266-3296.pl

More footprints

• 0.25W resistor mounted vertically.
  • R025_vert.pl
• Electroswitch C5 / C6 series 3-pole rotary switch
  • rotaryswitch-3p4p.pl