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Environmentally-friendly Mosquito Repeller
Environmentally-friendly Mosquito Repeller
September 27, 2010

With the return of the fine weather, you’ll doubtless be enjoying lazing around of an evening on your patio or in your garden, but even if you’re not surrounded by marshes or other shallow water... [more]


circuit from:http://www.extremecircuits.net/2010/05/environmentally-friendly-mosquito.html

Minimalist Oscilloscope
Minimalist Oscilloscope
September 26, 2010

If you are the proud owner of an old oscilloscope tube, you may be interested in using it once more for its original purpose. All you need are the right voltages on the right pins:... [more]


circuit from:http://www.extremecircuits.net/2010/05/minimalist-oscilloscope.html

Adjustable High/Low Frequency Sine wave generator
Adjustable High/Low Frequency Sine wave generator
June 22, 2010

This circuit uses the versatile MAX038 function generator. Although in this circuit some of the advanced characteristics of this IC are disabled, you can generate Sine, Triangle, Square waves. [more]

32 KHz oscillator using a watch crystal
32 KHz oscillator using a watch crystal
April 28, 2010

The output can be fed to a 15 stage binary counter to obtain a 1 second square wave. The circuit on the left using the 4069 inverter is recommended over the transistor circuit and produces... [more]

1 Second Time Base From Crystal Oscillator
1 Second Time Base From Crystal Oscillator
April 28, 2010

Two cascaded 12 stage counters (CD4040) form a 24 stage binary counter and the appropriate bits are gated together to produce the desired division. Using a crystal of some even multiple of 2 is desirable... [more]

Intermittetly Pulse Generator
Intermittetly Pulse Generator
April 24, 2010

The generators of square pulses, are used in a lot of applications, between which the adjustment of conditions of entry in the digital circuits and the control of amplifiers acoustic frequencies. [more]

WIEN Bridge Oscillator
WIEN Bridge Oscillator
April 24, 2010

As it is known the oscillators of bridge WIEN, they are used for the production of sine wave signals in the low frequencies. Basically they are constituted from amplifier of low frequencies, in which is... [more]

10MHZ to 1MHZ Frequency Converter
10MHZ to 1MHZ Frequency Converter
April 24, 2010

This circuit is an oscillator at frequency 10MHZ, using IC 1A and IC1B and a frequency divider. Using the IC2 it divides the pulses to 10. IC1C is a buffer. The variable capacitor 39pF is... [more]

Frequency Generator with 7 out step
Frequency Generator with 7 out step
April 24, 2010

This is a useful instrument for works hops. The standard of the produced frequencies is 10 to 1. The basic frequency is produced by a crystal with high accuracy. The circuit is consisted by the... [more]

Collection of three Clock Generators
Collection of three Clock Generators
April 24, 2010

Here exist a small collection from three generators, what using crystal for basic production of oscillations. Each generator uses different topology of circuit for the production of oscillations. [more]



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