farlepet / keithley-615-printer-boards

Drop-in replacements for the buffer/printer boards for the Keithley 615 Electrometer

Keithley 615 Electrometer Printer Board Recreation

This repo contains modern reproductions of the buffer/printer PCBs (PC209, PC218) for the Keithley 615 electrometer.

Boards

• PC218
  • Signal inverter/buffer board
  • Recreation of the origional PC218 schematic using modern SMD components is in the PC218 directory
  • A simplified version using more modern ICs can be found in the PC218v2 directory
• PC209
  • Signal inverter/buffer and trigger board
  • Simplified version of the origional board can be found in the PC209 directory
    • Same inverter/buffer scheme as PC218v2, with the origional trigger pulse generator and logic reduced down to discrete transistors, to simplify design.
• Digital Interface Board
  • This will be a new board designed to connect to the 615 via the 50-pin Centronics connector
  • Planned features:
    • Passive data collection
    • Active triggering
    • USB-serial
    • RS-232 via DE-9
    • Ethernet

Photos

PC218 v2.2:

PC209 v1.0:

Interface/network board v1.0:

50-pin test board v1.0: