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the absolutely useful switch power supply:the TDA two chips system power supply(A4)

Published:2011/8/13 6:49:00 Author:Ariel Wang | Keyword: absolutely useful , switch power supply, two chips system

the absolutely useful switch power supply:the TDA two chips system  power supply(A4)
the absolutely useful switch power supply:the TDA two chips system  power supply(A4)
the absolutely useful switch power supply:the TDA two chips system  power supply(A4)

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the output circuit of any scale count using CD4017(2)

Published:2011/8/13 6:53:00 Author:Ariel Wang | Keyword: output, scale count

the output circuit of any scale count using CD4017(2)
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the demodulator circuit of the radio frequency :NE565 PLL FM detector

Published:2011/8/12 21:19:00 Author:Ariel Wang | Keyword: Demodulator, PLL, FM, detector, radio frequency

the demodulator circuit of the radio frequency :NE565 PLL FM detector
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the IF circuit of the radio frequency:Filter switch RF circuit

Published:2011/8/12 21:21:00 Author:Ariel Wang | Keyword: IF, RF, Filter switch

the IF circuit of the radio frequency:Filter switch RF circuit
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the Oscillator circuit of the radio frequency :Buffered Butler oscillator RF circuit

Published:2011/8/12 22:05:00 Author:Ariel Wang | Keyword: Oscillator, radio frequency , Buffered, Butler

the Oscillator circuit of the radio frequency :Buffered Butler oscillator RF circuit
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the IF circuit of the radio frequency :NPN IF amplifier circuit

Published:2011/8/12 21:30:00 Author:Ariel Wang | Keyword: IF , radio frequency , NPN , amplifier

the IF circuit of the radio frequency :NPN IF amplifier circuit
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the IF circuit of the radio frequency :NPN IF amplifier circuit with AGC bias

Published:2011/8/12 21:32:00 Author:Ariel Wang | Keyword: IF, radio frequency , NPN , amplifier , AGC, bias

the IF circuit of the radio frequency :NPN IF amplifier circuit with AGC bias
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the IF circuit of the radio frequency :Universal IF amplifier circuit

Published:2011/8/12 21:33:00 Author:Ariel Wang | Keyword: IF, Universal, radio frequency , amplifier

the IF circuit of the radio frequency :Universal IF amplifier circuit
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the mixer circuit of the radio frequency :Dual NPN mixer RF circuit

Published:2011/8/12 21:36:00 Author:Ariel Wang | Keyword: Mixer, Dual, NPN , RF

the mixer circuit of the radio frequency :Dual NPN mixer RF circuit
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the mixer circuit of the radio frequency :Dual-gate MOSFET mixer RF circuit

Published:2011/8/12 21:35:00 Author:Ariel Wang | Keyword: Mixer, radio frequency , Dual-gate , MOSFET

the mixer circuit of the radio frequency :Dual-gate MOSFET mixer RF circuit
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the mixer circuit of the radio frequency :Dual JFET mixer RF circuit

Published:2011/8/12 21:40:00 Author:Ariel Wang | Keyword: Mixer, radio frequency , Dual , JFET

the mixer circuit of the radio frequency :Dual JFET mixer RF circuit
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the Mixer circuit of the radio frequency :Dual MOSFET mixer RF circuit

Published:2011/8/12 22:00:00 Author:Ariel Wang | Keyword: Mixer, Dual, MOSFET, RF


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the mixer circuit of the radio frequency :JFET mixer RF circuit

Published:2011/8/12 22:01:00 Author:Ariel Wang | Keyword: mixer, RF, JFET

the mixer circuit of the radio frequency :JFET mixer RF circuit
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the demodulator circuit of the radio frequency :MC-1495 Product detector circuit

Published:2011/8/12 21:20:00 Author:Ariel Wang | Keyword: Demodulator, Product detector, radio frequency

the demodulator circuit of the radio frequency :MC-1495 Product detector circuit
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the automatic measuring instrument of DS-88C type

Published:2011/8/12 21:16:00 Author:Ariel Wang | Keyword: automatic, measuring instrument

the automatic measuring instrument of DS-88C type
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the demodulator circuit of the radio frequency :FM discriminator circuit

Published:2011/8/12 21:13:00 Author:Ariel Wang | Keyword: demodulator, radio frequency , FM, discriminator

the demodulator circuit of the radio frequency :FM discriminator circuit
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the demodulator circuit of the radio frequency :CA3189E IF subsystem circuit

Published:2011/8/12 21:12:00 Author:Ariel Wang | Keyword: Demodulator, radio frequency, IF, subsystem

the demodulator circuit of the radio frequency :CA3189E IF subsystem circuit
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the optical tester of 555

Published:2011/8/12 21:10:00 Author:Ariel Wang | Keyword: 555, optical tester

the optical tester of 555
It is the optical tester circuit.It consists of photoelectric sensor,monoflop and audio circuit.The photoelectric sensor uses photocell 2CR33.   (View)

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the amplier circuit of the radio frequency :Voltage-tuned Dual-gate MOSFET RF amplifier circuit

Published:2011/8/12 21:02:00 Author:Ariel Wang | Keyword: amplier, Voltage-tuned , Dual-gate, MOSFET, RF , amplifier

the amplier circuit of the radio frequency :Voltage-tuned Dual-gate MOSFET RF amplifier circuit
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Monolithic Alarming Timer Circuit Diagram

Published:2011/8/9 17:57:00 Author:Vicky | Keyword: Monolithic, Alarming Timer

Monolithic Alarming Timer Circuit Diagram
Monolithic Alarming Timer IC1 is a 14 decimals counter/frequency divider and oscillator, which can work in a relatively wider range of frequency. When S1 closes, R4 and C2 can generate positive pulse when are turned on, and reset the counter. Then it begins counting. When it comes to 14 decimals, the 3 pin represents high level, and T1 drives the piezoelectric buzzer to produce sound. The time delay function can be adjusted by P1. Then relationship between time delay and parameters of components is shown as follows: 1 ~ 30 min: C1= 200mF; P1= 500KΩ; 1 ~ 60 min: C1= 470mF; P1= 500KΩ; 1 ~ 200 min: C1= 470mF; P1= 1MΩ.   (View)

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