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Model 140 Timing Pulse Generator

Produces repetitive pulses at intervals of .005 to 20 seconds. Period and duty cycle may be controlled internally or by applied control voltages.

DIY Resources

  • Schematics:
  • Errata: Based on examination of an actual unit, Apetechnology reports two minor changes: R1 100k (period in) has an additional 1meg resistor added in parallel; and on S6, the +15v connection should go to position #3, not position #2.
  • Builds: David Brown's essential build/repair notes, including a detailed circuit analysis.
  • PCBs