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Service manuals on meters

1  meters : Simple circuits. Baluns and coaxial aerials. Single led flasher. Long delay timer. Mains frequency meter. ELECTRONIC RELAY. MINIMAL AUDIO OSCILLATORS.
2  meters : Simple circuits. Multipleled flasher. Geomagnetic field detector. Reverse bias oscillator. Seismic detector. Electronic attenuator. Telephone line monitor.
3  meters : 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 ...
4  meters : 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 ...
5  meters : Minimum Mass Waveform Capture. Capturing repetitive waveforms at 1 million samples per second using PWM and a comparator on Atmel AT90S2313 or similar.
6  meters : 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.
7  meters : 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 ...
8  meters : Vu Meter For Power Amplifier
9  meters : VU Meter 1 with transistor. It is a simple circuit of optical index of level of sound signals, adapted in various needs of user.
10  meters : VU Meter 4 with LM3915 [10 Led] for Power Amp
11  meters : Mini audio spectrum analyzer
12  meters : VU Meter 5 with UAA180
13  meters : VU Meter 3 with LM3915 [10 Led] volume unit meter
14  meters : VU Meter 2 with LM3915 - LM3916 [19 Led] volume unit meter
15  meters : Tester for transistor, diodes and SCRs. by F.V.Hughes
16  meters : DC Voltmeter with High input impedance. The MOSFET input of the CA3140 makes it ideally suited for use in a high impedance DC voltmeter.
17  meters : Digital Voltmeter and Amperemeter
18  meters : 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 ...
19  meters : Frequency Meter 1 HZ to 1 MHZ, low cost
20  meters : 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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