Circuit Diagram

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

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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

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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

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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

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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

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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

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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

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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

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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

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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

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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

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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

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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

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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

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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

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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

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the optical tester of 555

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

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

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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 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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