Miscellaneous Testing Equipment

   Comparators and Detectors.

Voltage and Current Monitors

• Voltage Comparator Circuits
• Voltage Drops in Copper Traces
• LM3914 Bar-Graph Circuit
• High-Low Voltage Monitor
• Battery Charge Indicator
• +9 to -18v Voltage Monitor
• LM520C-1 Comparator Board
• Voltage to Current Converter
• A.C. Current Detector

Signal Detectors and Tracers

• Audible-Tone Circuit Tracer
• Electronic Stethoscope
• Heart-beat Sensor
• Comparision of Noisy Signals
• Balanced Differential Amp
• ADC Signal Conditioner (LM2904)
• Silver Satin Signal Tracer
• Peak Detector Probe (LM324)
• Sound Card Buffer (TL082)

Other Detectors and Generators

• Flame Detector
• Gas Detector
• Smoke Detector
• Sawtooth-pulse Converter (TL074)
• Squarewave/Sawtooth Converter
• Wien Bridge Oscillator
• Electrostatic Field Detector
• Negative Ion Detector
• Negative Ion Generator

Voltage Comparators (741 and LM324)

Voltage Comparators (LM3914)

Voltage Comparators (741)

Voltage Comparators (339)

Air Flow Detector

Flame Detector

Gas Detector

Smoke Detector

Voltage Drops in Copper Traces

LM520C-1 Comparator Board

A.C. Current Detector

Comparision of Noisy Signals

Balanced Differential Amp

Battery Charge Indicator

Silver Satin Signal Tracer

+9 to -18v Voltage Monitor

Peak Detector Probe (LM324)

Sound Card Buffer (TL082)

Sawtooth-pulse Converter (TL074)

Squarewave/Sawtooth Converter

ADC Signal Conditioner (LM2904)

Voltage to Current Converter

Wien Bridge Oscillator

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