Circuit Diagram

Laser diode singal source circuit

Published:2011/4/6 4:11:00 Author:Nicole | Keyword: laser diode, singal source

This circuit uses laser diode as switch, can obtain 10ns pulse, the repetition rate is more than 100kHz. This circuit is used in optical fiber communication system, the fiber-optic bundle or single fiber can be coupled to laser.   (View)

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Resistance value choice circuit

Published:2011/4/11 4:15:00 Author:Nicole | Keyword: resistance value, choice

This circuit adopts LED indicates whether the measured resistance value is in the 5% range of reservation precision, removing the too large or too small resistance. If make a few changes to circuit parameter, thenit will change the precision precision range.   (View)

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Timing circuit

Published:2011/4/6 4:11:00 Author:Nicole | Keyword: timing

This timing circuit only use a 5GI555 IC and a TRIAC, with other components form non-contact timer. The timing time 1h is continuous regulation, and the loading power is 200W with low power consumption.   (View)

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The photosensitive control circuit applied in weaving machine triple run digital controller

Published:2011/4/8 2:47:00 Author:Nicole | Keyword: weaving machine, digital controller

When one of warps is broken, the baffle which is hold on to the warp will fall, and the light source of photosensitive tube 3DU21 is blockaded by the baffle. The relay releases, and to control the motor stopped.   (View)

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Radiation thermometer circuit

Published:2011/4/8 2:46:00 Author:Nicole | Keyword: radiation thermometer

The detecting element is lead sulfide photosensitive resistance, it can measure the surface temperature more than 100℃. TR1~TR3 are 3 stage amplifiers, they are fixed on the detector, through bootstrap function of bias circuit, match input to 300kΩ resistance of radiation detecting element(6ISV). Adding bias voltage to all levels, to minimize the noise. When enviroment temperature rises, the thermistor with 2kΩ NTC adjusts gain, to make up for the reduction of radiation detecting element sensitivity. Final follower drives main amplifier and indication ammeter(no gave). Radiation detecting element outputs 0.3mV, can obtain 1mV through preamplifier, main amplifier outputs 20mV, it has 10% partial difference in the most sensitive range of 200μA ammeter. This circuit has 5 measuring ranges, the range of measuring temperature is 100~500℃.   (View)

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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)

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The charging system structure chart of distributed valve control seal lead acid storage battery

Published:2011/4/8 2:47:00 Author:Nicole | Keyword: valve control, plumbic acid battery, charging system

Adopting distributed system is a good way to solve the charging problem of large scale large capacity valve control seal plumbic acid battery, the host is used to monitor overall system, the slave computer is some high power chargers with same structure.   (View)

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Square-wave generator composed of CD4046

Published:2011/4/12 3:41:00 Author:Ecco | Keyword: Square-wave generator

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200w Voltage inverter circuit

Published:2011/4/12 3:45:00 Author:Ecco | Keyword: 200w , Voltage inverter circuit

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High output voltage integrated regulated power supply circuit 1

Published:2011/4/8 2:48:00 Author:Nicole | Keyword: high output voltage, regulated power supply

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Tracing integrated regulated power supply with positive voltage tracking negative voltage

Published:2011/4/8 2:48:00 Author:Nicole | Keyword: regulated power supply, positive voltage, negative voltage

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Isolating circuit with gain compensation

Published:2011/4/8 2:49:00 Author:Nicole | Keyword: isolating, gain compensation

The total harmonics distortion of this circuit is lower than 1%, and it can automatic regulation the gain variations which is produced by temperature or other DC in photoelectric isolator. After sampling, the output singal is fed back to FET, to keep constant AC gain.   (View)

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Zhongyi BCD-185 refrigerator

Published:2011/4/12 3:47:00 Author:Ecco | Keyword: Zhongyi , refrigerator

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Sunflower BC - 75 refrigerator

Published:2011/4/12 3:48:00 Author:Ecco | Keyword: Sunflower , refrigerator

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The integrated chip LR745 application case circuit of switching regulated power supply start-up circuit

Published:2011/4/8 2:51:00 Author:Nicole | Keyword: switching power supply, integrated chip

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Switching regulated power supply overcurrent protection circuit

Published:2011/4/8 2:52:00 Author:Nicole | Keyword: switching regulated power supply, overcurrent protection

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Cap lamp alarm circuit

Published:2011/4/8 2:52:00 Author:Nicole | Keyword: cap lamp, alarm

This circuit is designed by using cap lamp battery as power supply, it is fixed in mining cap. When the gas is overflow, then the headlight bulb will flash automatically, and with an alarm. With less component, the circuit makes no difference to cap lamp normal operation, it also has the advantages of low costs, adjustable alarm point, and convenient to carry.   (View)

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The internal protection circuit of Li-ion batteries

Published:2011/4/8 2:53:00 Author:Nicole | Keyword: Li-ion batteries

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The basic circuit of double level floating charge charger composed of UC3906

Published:2011/4/8 2:53:00 Author:Nicole | Keyword: double level, floating charge, charger

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Typical application circuit composed of MAX1894/MAX1924 with precharge function

Published:2011/4/8 2:54:00 Author:Nicole | Keyword: precharge function

Composed of MAX1894/MAX1924, lithium ion battery protection circuit has two charging control circuits, they are fast charging circuit and precharging circuit. Having precharge function typical application circuit composed of MAX1894/MAX1924 are as below.   (View)

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