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Circuitos y manuales de serrvicio de equipos medidores

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Simple circuits. Baluns and coaxial aerials. Single led flasher. Long delay timer. Mains frequency meter. ELECTRONIC RELAY. MINIMAL AUDIO OSCILLATORS.
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Simple circuits. Multipleled flasher. Geomagnetic field detector. Reverse bias oscillator. Seismic detector. Electronic attenuator. Telephone line monitor.
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A virtual measuring instrument for your PC. The virtual frequency meter is program for PC and simple measuring instrument, which is connected to COM to port of the computer. The virtual devi ...
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A frequency meter metal detector. We have designed the metal detector, the principle of operation which one differs from the classic schemes (BFO, transmit-receive known as "two-boxes&q ...
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Minimum Mass Waveform Capture. Capturing repetitive waveforms at 1 million samples per second using PWM and a comparator on Atmel AT90S2313 or similar.
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LC Determination by Resonant Frequency Measurement. A well-know oscillator ciruict combined with a frequency meter provides the basic function necessary to measure inductance and capacitance.
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A Microcontroller Based Digital Lock-In Millihommeter. Digital Lock-in Milliohmmeter Based on the experimental 1 kHz synchronous demodulator described on this site, this instrument measures ...
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Vu Meter For Power Amplifier
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VU Meter 1 with transistor. It is a simple circuit of optical index of level of sound signals, adapted in various needs of user.
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VU Meter 4 with LM3915 [10 Led] for Power Amp
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Mini audio spectrum analyzer
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VU Meter 5 with UAA180
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VU Meter 3 with LM3915 [10 Led] volume unit meter
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VU Meter 2 with LM3915 - LM3916 [19 Led] volume unit meter
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Tester for transistor, diodes and SCRs. by F.V.Hughes
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DC Voltmeter with High input impedance. The MOSFET input of the CA3140 makes it ideally suited for use in a high impedance DC voltmeter.
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Digital Voltmeter and Amperemeter
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Frequency counter (0 HZ - 1 MHZ). The MK50398 is one modern decimal counter up/down of six tens, with control of screen LED of seven segments and flip-flop of storage. Counter it can measure ...
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Frequency Meter 1 HZ to 1 MHZ, low cost
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Frequency Multiplier X100 with Noise Rejection for low frequency. The measurement of signals of low frequency is enough difficult in enough cases.
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Voltmeter with LED for car battery. The circuit, is a comparator, can measure with step of 1 V, the voltage of battery of car.
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Lightning Storm Detector. Detects approaching lightning storms by monitoring the RF spectrum
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ROTATING SPROCKET WHEEL LISSAJÓUS GENERATOR. The circuit described here utilizes a Lissajóus-pattern generator in conjunction with any typical analog oscilloscope capable of displaying x- an ...
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4 Ch Digital Logic Analyzer and 5 Ch Digital Oscilloscope in Parallel Port
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Oscilloscope testing module (huntron circuit)
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XYZ"s of Oscilloscopes
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Repair Memories
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Wall Wart Information. Advances in consumer electronics such as surface mount technology have reduced the ability of hobbyists to repair their own electronics and salvage components from dea ...
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Nifty Original Ideas: Test Probes Too Big? Wristwatch Hell. Phone Line Indicator
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"Super Octopus" & ESR Test Adapter Project
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Sine Wave Generator Project
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99 Cent ESR Test Adapter
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ESR Testing
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Function Generator. This kit is limited to less 100 kHz and has an output impedance of 600 ohms.
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"Octopus" Oscilloscope Test Adapters. This circuit dates back to at least 1935 and is a simple cheap adapter that converts just about any oscilloscope into a component tester.
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VU LED meter
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Ultrasonic Intruder detector
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Thermometer and thermostat for Room temperatures
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MOSFET testing
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MOSFET current sensing
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