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  • How to build Relay Toggle Circuit Using a 555 Timer

    2015-01-29 16:26:3977

    Description This 555 timer circuit below toggles a relay when a button is pressed. Pins 2 and 6, the threshold and trigger inputs, are held at 1/2 the ...

  • 555 Timer Time Delay Circuit

    2015-01-29 16:03:14117

    555 Timer Time Delay Circuit LEDs indicate at a glance what the status of the circuit is at any given moment. Once the reset switch, SW2, makes contact...

  • The delay circuit with "watchdog" composed of 555

    2015-01-29 14:35:37249

    The circuit used to be a power-delay control circuit, the delay time is decided by the timing components Rl, C1. However, with a watchdog circuit, you ...

  • 555 Oscillator With 50% Duty Cycle

    2015-01-29 14:21:1087

    To generate 50% active factor (duty cycle) using 555 IC, we can use two diodes to separate the charging and the discharging path. With no diodes, we ca...

  • Two kinds of eliminating AM broadcast band interference filt

    2015-01-29 13:14:3077

    In order to overcome the impact of AM break, several different measures can be used. Among them, the direct conversion receiver is well isolated to eli...

  • Four-tier telecommunications filter with ordinary frequency

    2015-01-29 10:47:1375

    Four-tier telecommunications filter with ordinary frequency of 1KHZ circuit is shown in the following.The circuit as shown can be applied for the usual...

  • 555 hig voltage delay time contact controlled circuit

    2015-01-29 10:39:20103

    This circuit is always used in the occasion that the filament need preheat in the vacuum tube equipment. It makes the filament has adequacy time to avo...

  • 555 Inductive switching power supply circuit

    2015-01-29 10:15:56127

    As shown in Figure 9-27, 555 and R1, R2, C1 form an astable multivibrator, the oscillation frequency is about 10kHz, duty cycle closes to 50%. VT2, VT3...

  • 555 Square wave Generator with a Large-scale Changeable Duty

    2015-01-29 10:07:3091

    Figure 3-5 Square wave Generator Circuit with a Large-scale Changeable Duty cycleAs shown in the figure 3-5, 555, R1,R2, RP1, D1,D2 and C1 constitute...

  • 555 Oscillator With 50% Duty Cycle CIRCUIT (LM555)

    2015-01-29 07:35:51105

    To generate 50% active factor (duty cycle) using 555 IC, we can use two diodes to separate the charging and the discharging path. With no diodes, we ca...

  • VCS using 555 Timer

    2015-01-29 06:33:23244

    Description In this circuit the 555 timer is used in a novel way, as a voltage controlled switch. Circuit Notes: The old and omnipresent NE555 can be v...

  • 3 Great Books to Learn 555 Timer Circuits and Projects

    2015-01-29 06:00:0998

    Any one who is interested in electronics would have come across this IC 555. It is the one component that is used in many wide range of applications. 5...

  • 555 Tone Generator (8 Ohm Speaker)(NE555)

    2015-01-29 03:36:3287

    This article describes the 555 Tone Generator (8 Ohm Speaker) (NE555). The content is very simple, very helpful. Components in this article can help yo...

  • Oscilloscope-Triggered Sweep using 555 IC (NE555)

    2015-01-29 02:19:35122

    This article describes the Oscilloscope-Triggered Sweep using 555 IC (NE555). The content is very simple, very helpful. Components in this article can ...

  • 555 IC Oscillator with 50% Duty Cycle (LM2575)

    2015-01-29 01:49:45149

    This article describes the 555 IC Oscillator with 50% Duty Cycle (LM2575). The content is very simple, very helpful. Components in this article can hel...

  • IR Remote Control Extender Circuit Based On The 555 IC

    2015-01-29 00:55:1871

    Description: The following circuit shows about IR Remote Control Extender Circuit. This circuit based on the 555 IC. Features: modulation frequency bei...

  • 555 Zero-Symmetric Bi-Directional Pulse Generator Circuit

    2015-01-29 00:42:08119

    As shown, this circuit can meet the requirements of the periodic pulse outputing symmetrically to the ground.Under the power voltage of +/-15V, it can ...

  • Relay Toggle Circuit Using a 555 Timer

    2015-01-28 21:31:1082

    This555 timercircuit below toggles a relay when a button is pressed. Pins 2 and 6, the threshold and trigger inputs, are held at 1/2 the supply voltage...

  • The lighting system, turn and danger alarm signal circuit of

    2015-01-28 21:05:2891

    Figure 1. the fog lamp and lighting circuit of Santana 2000 (gasoline injection engine)91-lighting lamp in alarm lamp switch; 92-tool box lighting lamp...

  • 555 long time delay circuit 1

    2015-01-28 18:04:21101

    As the figure 6-1 shown, the long time delay circuit uses 555 as the core,it usesa high-impedance op-amp CA3140 buffer amplifier, the feedback bootstra...

  • Serial communication circuit

    2015-01-28 17:55:14114

    The system implements serial port module is mainly by communicating with the host computer. The microcontroller system will send the collected data to ...

  • 555 IC For IR Remote Control Extender Circuit

    2015-01-28 17:00:46125

    Description: The following circuit shows about 555 IC For IR Remote Control Extender Circuit. Features: 850 and 950 nm signal, the control pulses and a...

  • The Power Supply, Starting and Ignition Circuit of Mazda 929

    2015-01-28 16:15:22140

    The outside size of Mazda 929 produced by Mazda Motor Corporation of Japan: 4700mm(length)*1690mm(width)*1420mm(height),4 passengers, curb weight:1160k...

  • 555 high/low voltage monitor circuit 1

    2015-01-28 16:03:25108

    As shown in the figure 9-17, the input voltage VDD is stabilized voltage supply, it requires hypotension outputs steady voltage, the load current reach...

  • band-pass filter formed by the low-pass and high pass filter

    2015-01-28 15:35:3181

    Band-pass filter is used to allow -3dB cutoff frequency with the low end and the high end. The frequency out of this range is eliminated. A simple way ...

  • 555 imitating natural wind circuit 2

    2015-01-28 12:29:04110

    As shown in Figure 12-6, the circuit includes the capacitor step-down rectifier circuit and multivibrator circuit and relay control section. 555 and R1...

  • IC 555 Design Note

    2015-01-28 12:11:2672

    The popular Timer IC 555 is extensively used in short duration timing applications. IC 555 is a highly stable integrated circuit functioning as an accu...

  • IC 555 Design Note(NE555)

    2015-01-28 11:51:3389

    This article briefly describes the IC 555 Design Note (NE555). This principle is easy to understand, but also very practical. Depth understanding of ci...

  • Qualcomm AM band suppression filter circuit

    2015-01-28 11:38:3688

    Many shortwave receivers would be adversely affected in front of the critical frequency, even if the rest parts of the receiver work well. For example,...

  • 555 Astable oscillator

    2015-01-28 11:21:0392

    This free-running multivibrator uses an external current sink to discharge the timing capacitor, C. Therefore, interval ^ may easily be 1000 the pulse ...

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