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0 ~ 5V line graph indicator circuit with LM3914 series of point / line graph LED display driver integrated circuit

Published:2012-10-30 21:09:00 Author:Ecco | Keyword: 0 ~ 5V, line graph, indicator, series , point / line graph , LED display , driver integrated circuit

0 ~ 5V line graph indicator circuit with LM3914 series of point / line graph LED display driver integrated circuit
LM3914LED display driver IC is widely used. It uses external components and line changes to form a variety of display and alarm circuits, and cascade may constitute a multi- LED display.   (View)

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LED dispaly circuit with flashing alarm using LM3914 series of point / line graph LED display driver integrated circuit

Published:2012-10-30 21:11:00 Author:Ecco | Keyword: LED dispaly , flashing alarm , series, point / line graph , LED display , driver integrated circuit

LED dispaly circuit with flashing alarm using LM3914 series of point / line graph LED display driver integrated circuit
LED dispaly circuit with flashing alarm using LM3914 series of point / line graph LED display driver integrated circuit is shown as the figure.   (View)

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The LD7208 car turning alarm ASIC typical application circuit

Published:2012-10-30 21:15:00 Author:Ecco | Keyword: car turning alarm , ASIC, typical application

The LD7208 car turning alarm ASIC typical application circuit
The main functions of the circuit: when operation is normal, the car light is intact, car light and bridge monitoring lamps flash at the same time, and the flashing frequency is 80 beats / min. Once the lights are damaged, the monitor lights flashing frequency will be doubled to show the alarm.   (View)

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Gas, gas detection alarm circuit using CH217 monolithic gas, gas detection alarm integrated circuit

Published:2012-10-30 21:24:00 Author:Ecco | Keyword: Gas, gas detection , alarm , monolithic gas, alarm integrated circuit

Gas, gas detection alarm circuit using CH217 monolithic gas, gas detection alarm integrated circuit
R1 in Figure is agas sensing probe, and its resistance reduces with a linear relationshipto gas concentration increasing, andRP3 is used to adjust the output ofamplifier, R6, R7 are used to draw forecasting and risk baseline signal voltages.   (View)

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The basic application circuit of BA6104 5-bit LED level meter driver integrated circuit

Published:2012-10-30 21:21:00 Author:Ecco | Keyword: basic application , 5-bit, LED level meter, driver integrated circuit

The basic application circuit of BA6104 5-bit LED level meter driver integrated circuit
BA6104's input stage uses PNP composite transistor base electrode input mode, so input impedance is very high. The output stage uses emitter follower form, adjusting the external resistor RL in figure can change the LED driving current. Pin 7 is connected to a resistor to change Vref, when pin 7 is open, reference voltage Vref is controlled by the internal IC, and its value is approximately 1V.   (View)

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The oscillator and trigger circuit with operational amplifier

Published:2012-10-29 21:34:00 Author:Ecco | Keyword: oscillator , trigger , operational amplifier

The oscillator and trigger circuit with operational amplifier
The oscillator and trigger circuit with operational amplifier

Fig a shows a multivibrator circuit which can generate square wave signal; Figure b is a flip-flop circuit which uses the under edge of the input signal to generate a trigger pulse signal. Figure c is a monostable circuit which can be used for waveform shaping or other signal conversion circuits. Figure d shows a Schmitt trigger circuit for waveform shaping or other signal conversion circuit. Figure e is a triangle wave and square-wave signal generator circuit.   (View)

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DC motor start circuit controlled by the time relay

Published:2012-10-29 21:50:00 Author:Ecco | Keyword: DC motor, start circuit, controlled , time relay

DC motor start circuit controlled by the time relay
In fact, it is a resistor buck-start DC motor start circuit, but it uses time relay to control the shorted resistor. When the power switch QS is closed, pressing the start button ST can make the DC contactor 1KM be energized, the normally open contact is closed, then the armature loop is connected to R1 , R2. Time relay 1KT also starts at the same time, and its normally open contact 1KT is closed with a delay time, 3KM was energized to make R1 be shorted, then motor M accelerates.   (View)

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DC motor reverse brake circuit

Published:2012-10-29 22:10:00 Author:Ecco | Keyword: DC motor l reverse brake

DC motor reverse brake circuit
No matter in DC motor and AC motor system, due to the inertia of rotor and its transmission parts, the entire transmission system can completely stop over a period of time after rotating motor power is cut off. However, in the production process, it is required to stop motor in order to improve work efficiency, and even called for an immediate stop, so the effective braking measures must be taken to the motor.   (View)

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DC motor dynamic braking circuit

Published:2012-10-29 22:06:00 Author:Ecco | Keyword: DC motor l dynamic braking

DC motor dynamic braking circuit
When it is braking, pressing the stop button STP will make DC contactor KM be de-energized, the normally closed contact KM restores the closed state, so that the the voltage relay KV coil gets electric and moves, and its normally open contact KV is closed, then DC contactor KMB gets electric operation, the braking resistor R and armature M are connected in parallel. Excitation current direction has not changed, the torque generated by motor is the braking torque, so that the motor is rapidly stopped.   (View)

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DC motor servo control circuit

Published:2012-10-29 21:56:00 Author:Ecco | Keyword: DC motor , servo control

DC motor servo control circuit
In the circuit, E, O points are input DC voltage, then the motor will be moved to a position corresponding to a given voltage. The potentiometer coaxially connected to motor is used as position feedback. When a given voltage and 1k potentiometer wiper contact voltage are equal, the differential amplifier output is zero, so the motor is stationary; Otherwise, the motor will be transferred or reversal according to the size of the signal.   (View)

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High Efficiency 500kHz, 4.5A Step-Down Converter

Published:2012-10-29 22:07:00 Author:muriel | Keyword: High Efficiency , 500kHz, 4.5A , Step-Down Converter

High Efficiency 500kHz, 4.5A Step-Down Converter
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60V/3A Step-Down DC/DC Converter

Published:2012-10-29 22:06:00 Author:muriel | Keyword: 60V/3A, Step-Down DC/DC Converter

60V/3A Step-Down DC/DC Converter
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4MHz Monolithic Synchronous Step-Down Regulators

Published:2012-10-29 22:06:00 Author:muriel | Keyword: 4MHz, Monolithic Synchronous , Step-Down Regulators

4MHz Monolithic Synchronous Step-Down Regulators
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3A, 2MHz Monolithic Synchronous Step-Down Regulator

Published:2012-10-29 22:05:00 Author:muriel | Keyword: 3A, 2MHz, Monolithic Synchronous, Step-Down Regulator

3A, 2MHz Monolithic Synchronous Step-Down Regulator
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10µA Quiescent Current Step-Down Regulators

Published:2012-10-29 22:04:00 Author:muriel | Keyword: 10µA , Quiescent Current , Step-Down Regulators

10µA Quiescent Current Step-Down Regulators
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LTC3453 - Synchronous Buck-Boost High Power White LED Driver

Published:2012-10-29 22:03:00 Author:muriel | Keyword: LTC3453 , Synchronous Buck-Boost, High Power, White LED Driver

LTC3453 - Synchronous Buck-Boost High Power White LED Driver
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Single Inductor, Tiny Buck-Boost Converter

Published:2012-10-29 22:03:00 Author:muriel | Keyword: Single Inductor, Tiny Buck-Boost Converter

Single Inductor, Tiny Buck-Boost Converter
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LM2673 Positive to Negative Converter

Published:2012-10-29 22:02:00 Author:muriel | Keyword: LM2673 , Positive to Negative Converter

LM2673 Positive to Negative Converter
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No Design Switiching Regulator

Published:2012-10-29 22:01:00 Author:muriel | Keyword: No Design Switiching Regulator

No Design Switiching Regulator
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Micropower Buck/Boost Circuits, Part 2

Published:2012-10-29 22:00:00 Author:muriel | Keyword: Micropower Buck/Boost Circuits

Micropower Buck/Boost Circuits, Part 2
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