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Sawtooth wave circuit generated by NE566V

Published:2011/4/12 22:47:00 Author:Ecco | Keyword: Sawtooth wave

Sawtooth wave circuit generated by NE566V
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20kHz Waveform Generator composed of NE566V

Published:2011/4/12 22:49:00 Author:Ecco | Keyword: 20kHz , Waveform Generator

20kHz Waveform Generator composed of NE566V
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Special sound audio oscillator circuit(NE555、CD4017)

Published:2011/4/6 20:12:00 Author:Ecco | Keyword: Special sound , audio oscillator

Special sound audio oscillator circuit(NE555、CD4017)
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Linear voltage-controlled oscillator(555)

Published:2011/4/10 22:13:00 Author:Ecco | Keyword: Linear , voltage-controlled oscillator, 555

Linear voltage-controlled oscillator(555)
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Noise generator with various sounds composed of HT2880

Published:2011/4/12 0:52:00 Author:Ecco | Keyword: Noise generator , various sounds

Noise generator with various sounds composed of HT2880
This circuit can produce eight kinds of sounds, that are two kinds of guns' sounds, two bomb sounds, dual-tone melody, the game sound, animal sounds and the sound of rifles. The eight sounds can be played by rotary switch S2 and button switch. HT2880 is a CMOS LSI's ROM chip. In the circuit, the transistors VT1 and VT2 connects as Darlington tubes, they are used as forecast the output signal of pins. (View)

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Negative resistance LED oscillation circuit

Published:2011/4/10 22:38:00 Author:Nicole | Keyword: negative resistance, LED, oscillation

Negative resistance LED oscillation circuit
This circuit can cover 3.2~8.0 kHz frequency range. It can inspire the loudspeaker which is connected on X point. In oder to obtain lower frequency and large sound, it should change C1 into 1μF. The negative resistance part of this circuit consists of Q1, Q2, LED, R2 and R3. Optical isolator device is MCF-2 or equivalent component. (View)

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Noise generator composed of CH4040

Published:2011/4/12 0:38:00 Author:Ecco | Keyword: Noise generator

Noise generator composed of CH4040
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Wien-bridge sine wave generator 1

Published:2011/4/10 22:42:00 Author:Ecco | Keyword: Wien-bridge , sine wave generator

Wien-bridge sine wave generator 1
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Wien-bridge sine wave generator 2

Published:2011/4/10 22:43:00 Author:Ecco | Keyword: Wien-bridge , sine wave generator

Wien-bridge sine wave generator 2
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Wien-bridge sine wave generator 3

Published:2011/4/10 22:45:00 Author:Ecco | Keyword: Wien-bridge, sine wave generator

Wien-bridge sine wave generator 3
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Multi-purpose FM signal generator

Published:2011/4/12 2:54:00 Author:Ecco | Keyword: Multi-purpose , FM signal generator

The multi-purpose FM signal generator is shown in the chart. VTl, VT2 form multivibrator, VT3 is emitter follower, which makes a frequency modulation to osicillating signal source of VT4, and sent by Tx antenna. (View)

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Frequency shift keying signal (FSK) generator

Published:2011/4/12 3:37:00 Author:Ecco | Keyword: Frequency shift keying, signal generator

Frequency shift keying signal (FSK) generator
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60Hz frequency source

Published:2011/4/12 3:33:00 Author:Ecco | Keyword: 60Hz, frequency source

60Hz frequency source
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Digital display clock signal source (CD4543、CD4060、CD4518)

Published:2011/4/12 3:23:00 Author:Ecco | Keyword: Digital display clock , signal source

Digital display clock signal source circuit shown as the chart is taken from a actual circuit of multi-point detection control box . It mainly consists of automatic and manual clock pulse generator pulse generator, pulse counter and digital display. (View)