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  • PWM controller of controlling DC power load circuit diagram

    2015-02-04 13:36:59104

    The pulse-width modulation (PWM) controlling DC PowerIf you have to control small motor speed or light levels, the general perception is to adjust the ...

  • 555 IC automatic battery charger circuit diagram(2)

    2015-02-04 10:30:38239

    RS flip-flop is composed of A 555 circuit, The two internal comparator reference voltage is supplied by external regulator VS commected to pin 5, so th...

  • 555 Monostable Circuit with a Changeable Width

    2015-02-04 10:09:4094

    For a general monostable circuit, the pulse width output is a fixed value. As shown in the picture 2-9, pulse in the circuit uses a closed loop to cont...

  • 555 IC for Square Wave Tone Burst Generator

    2015-02-04 10:05:27147

    Square wave tone bursts is provided by depressing the pushbutton. Its duration depends on the duration for which the voltage at Pin 4 exceeds a thresho...

  • The protection circuit of 555 fridge

    2015-02-04 10:04:37122

    See as Figure 13-8, the protector is formed by sub-circuits of the step-down rectifier, delay starter, over/low voltage sample and trigger,etc. The pro...

  • Work Principle of 555 Monostable Model

    2015-02-04 08:11:2681

    The Monostable multi-vibrator composed of 555 has been shown in the picture 2-1.This chapter takes the bipolar 555 as an example; functional terminals ...

  • 555 Automatic Speed Controller for fans

    2015-02-04 07:33:2795

    Function: in predetermined time the fan run at full speed . after some time the speed is decreased to be medium, and to slow later on. After a period o...

  • Bell circuit with two 555 timers

    2015-02-04 06:34:1285

    This circuit is also Crossed to: Beeper - Buzzer , Doorbell Circuit , 555 Timer Circuit This simple Bell circuit uses two 555 timers. The frequency is ...

  • 555 Negative voltage source circuit

    2015-02-04 06:00:5672

    As shown in Figure 9-1, 555 and R1, R2, C3 form an astable multivibrator, f = 1.44 / (R1 +2 R2) C3, the frequency of the icon parameter is about 80kHz....

  • Noise generator 2 frequency with ic 555 (LM336)

    2015-02-04 04:09:25148

    This article describes the Noise generator 2 frequency with ic 555 (LM336). The content is very simple, very helpful. Components in this article can he...

  • 555 Audio ohmmeter circuit

    2015-02-04 03:26:28226

    As shown in Figure 7-9, audio ohmmeter uses 555 as the core. The circuit is actually a multivibrator. The table pen is connected to resistor Rx, and th...

  • 555 automatic reset electric shock protector circuit

    2015-02-04 02:28:44135

    The tube is connected to 555's trigger terminal 2 foot, ordinarily, VT1 tube cuts off, 2 foot is high level. A monostable circuit is composed of 555 an...

  • 555 Based Alarm Circuit

    2015-02-04 01:57:19106

    The alarm circuit has a single 555 oscillator/timer (Ul) performing double duty; serving both in the alarm-trigger circuit arid the entry- delay circui...

  • Sawtooth Wave Oscillator Using 555 IC

    2015-02-04 00:54:06102

    Sawtooth wave oscillator? circuit can be implemented using several methods, here we present one design that employs 555 IC.? Here is the schematic diag...

  • 555 Non-TransformerDC/It2 Positive Voltage output circuit

    2015-02-03 23:32:25151

    As shown in picture9-6, 555,R1, R2 and C1 constitute an astable multi-vibrator, accordingto the following formula: f=1.44/(R1+2R2)C1frequency of output...

  • 555 motor integrated protection warning device circuit

    2015-02-03 23:17:44103

    As shown in the figure 10-12, this device is made as the core of 555. It fully uses the characteristic of time base circuit's trigger set, reset and co...

  • 555 based Reset Generator

    2015-02-03 22:50:4671

    You must have read all the circuits and explanation on the other pages at delabs to understand this, as i cannot repeat the same thing as i have done i...

  • 555 Timekeeping audio circuit

    2015-02-03 22:17:35128

    The circuit is shown in Figure 14-31, it is a timing signal controlled multivibrator composed of 555. Pin 4 of 555 is the force reset terminal, when th...

  • 555 shooting game machine circuit

    2015-02-03 18:31:5769

    The astable multivibrator is composed of IC3 and R5, R6, R3, C5, the oscillation frequency f=1.44(R5+2R6)C5, it is about 1000Hz. At the same time, The ...

  • How to build 555 Tone Generator (8 ohm speaker)

    2015-02-03 18:16:2093

    Description This is a basic 555 squarewave oscillator used to produce a 1 Khz tone from an 8 ohm speaker. In the circuit on the left, the speaker is is...

  • 555 Linear Voltage/Frequency Converter circuit Four

    2015-02-03 16:23:33133

    As shown in the picture5-37, IC1, R1, C1 and D1 constitute an integrator, 555, R2 and C2 constitute a monostable trigger, if input voltage Vi ranges fr...

  • Crystal oscillator Circuit composed of 555

    2015-02-03 15:20:06121

    With the composition of a 555 circuit, a quartz crystal oscillator circuit can be formed. As shown in the figure 3-7, after jointing point A and point ...

  • 555 Gate Pulse Generator Circuit

    2015-02-03 15:04:56293

    As shown, 555 and RP1, RP2, C1 compose the controllable multivibrator, its oscillation frequency depends on the constant time of R1, RP1, RP2, C1. But ...

  • 555 IC for Square Wave Tone Burst Generator (NE555)

    2015-02-03 15:03:12229

    This article describes the 555 IC for Square Wave Tone Burst Generator (NE555). The content is very simple, very helpful. Components in this article ca...

  • Driving Relay with 555 IC

    2015-02-03 14:41:5390

    This is a Driving Relay circuit using 555 IC. The circuit is used to drive a relay to avoid 555 hangs up, it uses an inductive feedback. The coil is pr...

  • The Astable-Oscillator Operating Mode in 555 Timer IC Circui

    2015-02-03 14:38:3284

    The 555 Timer ICworked in threeoperating modes: monostable, astable and bistable/scmitt trigger. Here we will provide you with article of its astable m...

  • Mitsubishi Pajero (PAJERO) light off-road vehicle powered ca

    2015-02-03 14:36:07134

    Mitsubishi Pajero (PAJERO) light off-road vehicle powered car window theory circuit diagram50 door motor relay; 51 window motor for a main switch; 52,5...

  • 555 outburst audio circuit

    2015-02-03 14:17:32117

    As shown in the figure 11-20, the outburst audio circuit is composed of a monostable trigger circuit and a multivibrator, it can be made of a 556 integ...

  • Southeast Soveran motor control circuit

    2015-02-03 14:09:1686

    ...

  • Pulse Width Modulator Using 555 IC

    2015-02-03 13:29:13395

    Pulse width modulator produce a PWM signal, a pulse with a constant frequency but with the duty cycle vary according to a modulating signal. Here is th...

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