PULSAR ELECTRONICS Model 066 - Interval Timer

Circa

An electronic interval timer, used for laboratory experiments, photography darkroom timing, or industrial process control.

Use Cases:

• Scientific Research: Measuring precise time intervals between events, such as chemical reactions or mechanical movements.

• Psychology/Behavioral Studies: Timing stimulus-response tasks where a subject must start or stop a timer based on specific cues.

• Photography: Used as a darkroom enlarger timer to control exposure times for film processing.

• Industrial Testing: Monitoring duty cycles or duration-based stress tests for components.

Key Controls and Indicators:

• Digital Display: A 3-digit LED readout for monitoring the countdown or elapsed time.

• Range Switch: Sets the time scale, including options for 9.99 seconds, 99.9 seconds, 99.9 milliseconds, and 999 milliseconds.

• Start/Stop Knobs: Rotary selectors for defining how the timing sequence is triggered or terminated.

• Input Ports: Includes a Stop Input for external remote triggers and a GND (Ground) terminal for circuit safety.

• Busy Indicator: A red LED that lights up while a timing cycle is actively running.

Historical Significance:

PULSAR ELECTRONICS. was part of the wave of electronics manufacturers that emerged during the "Digital Revolution" of the 1970s. The Model 066 reflects the transition from mechanical analog timers to Solid State digital instruments. Its use of early LED technology and modular rotary controls is characteristic of high-end bench-top equipment from that era, prioritizing accuracy and repeatability that was previously difficult to achieve with purely mechanical devices.

(H-8.5cm x W-18cm x D-19cm)