keithley-615-printer-boards

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Keithley 615 Electrometer Printer Board Recreation

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

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

PC218 v2.2:

PC209 v1.0:

Interface/network board v1.0:

50-pin test board v1.0:

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