Circuit Diagram

74 series digital circuit of 7482 2-bit binary full adder

Published:2011/4/5 22:52:00 Author:Ecco | Keyword: digital circuit , 2-bit binary, full adder

∑ output, and carry bit is produced by the second bit. 7482 2-bit binary full adder: To execute 2-bit binary addition.   (View)

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74 series digital circuit of 74H87 binary true form/inverse code and O/I circuit

Published:2011/4/2 4:09:00 Author:Ecco | Keyword: digital circuit , binary true form, Anti-code , O/I circuit

74H87 binary true form/Anti-code, O/I circuit   (View)

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Automatic gas circulatory stove temperature control circuit diagram

Published:2011/4/14 2:22:00 Author:Ecco | Keyword: Automatic , gas circulatory stove, temperature control

1. Manual method: First, to pull combination switch HK to manual position, then the contacts of KK1 are connected, the relay J coil is energized pull, the AC contactor IC takes action, resistance furnaceis heating, when the temperature rose to the required temperature, to pull KK to 0 position, so that J and JC coil lose power, electrical furnace loses the power, and it won's rise the temperature again. 2. Automatic way: To pull combination switch HK to the automatic position, then the contacts of KK2 are connected, since the digital potentiometer thermometer CB is below the predetermined temperature, contact CB is closed, so that J is energized pull, and IC coils get electric power to heat up the electrical furnace. When the temperature reaches a predetermined temperature, contact CB automatic breaking, so that J coil and IC breaking, electrical furnace stops heating, to realize automatic temperature control. The K in the chart is the power switch of meter. HD and LD are the energizing and breaking indications.   (View)

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TWL2213 typical application circuit charge circuit

Published:2011/4/20 8:08:00 Author:Nicole | Keyword: typical application, charge

The related components information applied in this circuit: TWL2213 is mainly used in power management of portable instruments or equipments which is powered by lithium ion battery such as PAD, telephone, pager. It is also designed for charging to lithium ion battery. The typical circuit is as below:   (View)

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Astable Multivibrator Circuit

Published:2011/4/20 20:43:00 Author:Sue | Keyword: Astable, Multivibrator

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TWL2213 pin arrangement diagram

Published:2011/4/20 7:52:00 Author:Nicole | Keyword: pin

TWL2213 is produced by US TI Company, it is a new type power management and lithium ion battery charge control IC, it is designed for portable IT products.   (View)

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Voltage monitoring and reset circuit with TL7705CP

Published:2011/4/20 4:38:00 Author:Nicole | Keyword: Voltage monitoring, reset

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TIL probe circuit

Published:2011/4/20 8:55:00 Author:Nicole | Keyword: probe

If the polarity switch is in the position as shown, when the input probe receives low level(nagative)pulse, LED lights and it will keep lighting until the circuit is reset. If the switch is put to another position, when there is high level or +5V input pulse, LED lights too.   (View)

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The multivibrator composed of D flip-flop

Published:2011/4/14 2:38:00 Author:Ecco | Keyword: multivibrator , D flip-flop

T0 connect theQ output terminal of D flip-flopto RC components toform a monostable trigger. The non-output terminal of Q connects to a group of RC components, they will make up a non-steady-state circuit, and it's a multivibrator. The composition is shown as the chart:   (View)

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1kHz Audio square wave generator

Published:2011/4/20 5:50:00 Author:Ecco | Keyword: 1kHz, Audio , square wave, generator

The lkHz left and right audio square wave generator is mainly composed of the comparator LM324 and R2, R3, R4 and Cl, the circuit is shown as the chart. The reference voltage GB / 2 on input end of pin 3 of LM324 is got by the voltage divider circuit Rl, R2. The R2 and R3 constitute positive feedback, integral circuit R4 and Cl constitute negative feedback. First taking the value of R2 and R3 make R2 / (R2 + R3) = 0.5, then the square wave repetition frequency f = 1/2R4 · Cl, if selecting Cl = 0.033pF, R4 = 15kΩ, the substituted f = lkHz. Changing Cl or R4 can change the oscillation frequency.   (View)

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Photoelectric isolation circuit between TTL circuit and relay circuit

Published:2011/4/20 8:44:00 Author:Nicole | Keyword: photoelectric isolation, TTL, relay

In this circuit, using a photoelectric coupler can reach 100GΩ isolation between TTL and relay circuit, it avoids relay noise and peak voltage influencing TTL circuit. When the TTL input singal is high, Q1 turns on, there is no current in LED, and there is no light incident on detecor, photoelectric diode is in 5GΩ maximum impedance value. So Q2 is nonconductive, then Q3 is nonconductive too, and there is no current in relay coil.   (View)

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M62253FP charge controllor

Published:2011/4/20 9:01:00 Author:Nicole | Keyword: charge controller

M62253FP is produced by Janpan Mitsubishi Electric C.Ltd, it is used specifically for the charge controllor of lithium ion battery. The pin arrangement diagram is as below:   (View)

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High stable 12V regulated power supply composed of MC1469C integrated regulator

Published:2011/4/20 4:42:00 Author:Nicole | Keyword: 12V regulated power supply, integrated regulator

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Greenhouse or plastic house anti-condensation automatic vent with birdsong phonation circuit

Published:2011/4/20 6:43:00 Author:Nicole | Keyword: greenhouse, plastic house, automatic vent, birdsong

The circuit is as shown. It is composed of resistor type dew condensation sensor, electronic switch, relay control discharge fan circuit, birdsong phonation circuit, audio power amplifier circuit and AC depressurization rectifier circuit. RH is a resistor type dew condensation sensor, it is sensitive to the high humidity air, and it can detect whether the steam in the air will be dew condensation.   (View)

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Greenhouse flower seedling humidity control with birdsong circuit

Published:2011/4/20 20:18:00 Author:Nicole | Keyword: greenhouse, flower seedling, birdsong

The circuit is as shown, it is composed of humidity semsor, detection circuit, temperature indicator, comparison circuit, SCR control heating circuit, birdsong phonation circuit and AC depressurization rectifier circuit. RH is humidity sensor, it adopts MS01-B, when the relative humidity changes in the range of 20%~90%, its resistance will change between few KΩ and several hundreds kΩ.   (View)

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Vegetable greenhouse humidity detection automatic ventilating with cricket chirped circuit

Published:2011/4/20 4:31:00 Author:Nicole | Keyword: vegetable greenhouse, humidity detection, automatic ventilating, cricket chirped

The circuit is as shown. It consists of temperature detection circuit, schmidt trigger circuit, SCR control ventilating circuit, voice phonation circuit and AC depressurization rectifier circuit. It can detect the high humidity environment, when the relative humidity beyond the set value, the circuit will send out cricket chirp, and start discharge fan to operate, ventilate.   (View)

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Circuit Of AN7415/7415S FM Stereo Decoder

Published:2011/4/20 8:13:00 Author:TaoXi | Keyword: FM, Stereo Decoder

The Internal Block Diagram of The AN7415／7415S The Typical Application Circuit Of The AN7415／7415S   (View)

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Circuit Of Induction Telephone Loudspeaker

Published:2011/4/20 9:36:00 Author:TaoXi | Keyword: Induction, Telephone Loudspeaker

In some cases such as the telephone conference, we need to amplify the voice of telephone to lots of people, and we need to record the contents from the telephone. This circuit can simultaneously satisfy both of these requirements, do not need to make any changes, just put it near the telephone. When the voice current through the coil inside the telephone, there is a magnetic field in the vicinity, so If you put a coil L at both ends, the magnetic field will induce the signal voltage, then amplify the signal to amplify the voice of telephone to lots of people. Telephone inductive amplifier circuit is as shown, coil L will be converted the leakage magnetic field of voice into the electric signal, then controlled by potentiometer RP1 to get into the pre-formed amplifier stage that is composed by the transistor VT1, through the capacitor C4 and the potentiometer RP2 to get into the power amplifier stage to be amplified by the IC1 (audio integrated amplifier LM2896), output signal of pin IC1 promote sound speaker BL1 to make sound.   (View)

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Circuit Of LAG665D/665F Single Cassette Stereo Player

Published:2011/4/20 8:06:00 Author:TaoXi | Keyword: Single Cassette, Stereo

The Circuit Of LAG665D/665F Single Cassette Stereo Player is as shown.   (View)

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Neighbor Pulse Delay Circuit(555)

Published:2011/4/20 19:48:00 Author:Sue | Keyword: Neighbor, Pulse, Delay, 555

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