Tools and measuring circuit diagrams
Dual-purpose test-instrument. Very simple circuitry, 1.5V Battery-operated
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This logic probe uses a single CMOS 4001 IC and can display high, low and pulsing outputs.
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Detects the presence of a live mains conductor Minimum parts counting
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Remote sensor sends data via mains supply
Temperature range: 00.0 to 99.9 °C
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A multi wire cable tester with a separate LED for each wire. Will show open circuits, short circuits, reversals, earth faults, continuity and all with four IC's. Designed initially for my intercom, but can be used with alarm wiring, CAT 5 cables and more.
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Tests 1.5 to 15 Volt cells Two-LED display, no power supply required
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Detects 1.8 to 230 Volts DC or AC
Minimum parts counting
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Tests transistors and diodes for polarity. Simple circuitry - 9V Battery operation
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The RF engineer sometimes has to look for an instrument that will check a low frequency quartz crystal unit reliably and rapidly. This is a difficult piece of equipment to find and the engineer often has to consult an electronic circuits handbook for the schematic of a circuit that will perform the task.
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Indicates the basic integrity of a printed board. Self-powered - 3 to 30V range.
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