Mutchus

An electrically operated rolling shutter usually has a standard control panel with a three-position switch: up, down and stop. If you would like to automate the opening and closing with a time controlled switch, a few additional wires will have to be connected. Typically, the controls are implemented as indicated in the schematic ‘Normal Situation’. If this is indeed the case, then you can see in ‘New Situation’ how the shutter can be automated with a timer. There is only one method to determine the actual schematic of your control circuit, and that is to open the control box and using an ohmmeter, pencil and paper to check out and draw the circuit. Make sure you turn the power off first though! Connect a 230-V relay (with both the contacts and the coil rated 230 VAC) to the timer.   The changeover switch between automatic and manual control needs to be rated 230 VAC as well and may not be a hazard for the user. The relay and switch are preferably fitted in a plastic mains adapter e...

This is the Simple 6Meter kilowatt amplifier Circuit Diagram.The amplifier uses a grounded grid circuit with either the Eimac 3CX1000A7 or 8877, ceramic/metal triodes intended for linear service in the HF and VHF ranges. The amp provides the legal power output of 1500 watts PEP and CW service with no effort and requires a driver delivering between 50 and 80 watts at 50 MHz. With a plate voltage of 3000 volts at 0.8 amps the amplifier performs at 60 percent efficiency. The grid is grounded by means of the grid ring of the 3CX1000A7 socket providing a low-inductance path td ground. The amplifier is completely stable. Simple 6Meter kilowatt amplifier Circuit Diagram

This is a circuit for emergency lighting with LEDs that uses electricity from the telephone line . Generally the phone line has a DC voltage 48V and somewhere around 20 mA , and when the phone rings , the voltage rises to 96V AC . This works in a way that the phone line will not be busy while the LEDs are turned on and when you pick up the phone , the light goes off and lets you use your phone normally .  Emergency Light using Phone Line Circuit Diagram

Adaptor for Bass Guitar Amp . These days, music is a major hobby for the young and not-so-young. Lots of people  enjoy  making  music,  and  more  and  more dream of showing off their talents on stage. But one of the major problems often encountered is the cost of musical equipment. How many amateur music groups sing  through an amp borrowed from a guitarist or bass player?  This is where the technical problems arise not in terms of the .25” (6.3 mm)  jack, but in terms of the sound quality (the words  are barely understandable) and volume (the amp  seems to produce fewer decibels than for a guitar). What’s more, unpredictable feedback may cause damage to the speakers and is very unpleasant on the ear. This cheap little  easy-to-build project can help solve these technical  problems. . Adaptor for Bass Guitar Amp Circuit Diagram Vocal Adaptor for Bass Guitar Amp Circuit Diagram A guitar (or bass guitar) amplifier is ...

The NE566 Function Generator is a Voltage-Controlled Oscillator of exceptional linearity with buf fered square wave and triangle wave outputs. The frequency of oscillation is determined by an external resistor and capacitor and the voltage applied to the control terminal. The Oscillator CAN be programmed over a ten-to-one frequency range by proper selection of an external resistance and modulated over a ten-to-one range by the control voltage, with exceptional linearity.  FMAX = 1 MHz     WIDE 1000:1 Continuous Sweep Possible  NE566 Function Generator Circuit Diagram Pdf Datasheet  Sourced by : Circuitsstream

This circuit is a five-band graphic equalizer mono, covering the audio frequency of 55Hz, 270Hz, 1kHz, 3.5 kHz and 12kHz. The basic difference between this graphic equalizer with other circuits, is instead of CI it uses transistors, the power supply is also special is +24 V 0-24v DC, this ensures low distortion and greater margins overload.   Simple 5 Band Graphic Equalizer Circuit Diagram List of components R1-4-37 = 330Kohms R2-7 = 2.2Kohms R3 = 120Kohms R5-6 = 6.8Kohms R8 to 12 = 1.8KOHMS R13 to 15 = 200Kohms R16 = 180Kohms R17 = 150Kohms R18 = 1.5KOHMS R19 to 22 = 1Kohms R23 to 27 = 220Kohms R28 to 32 = 15Kohms R33 = 10Kohms R34 = 15Mohm R35-38 = 220 ohms 1W R36 = 100 ohms C1-3 = 40V 1uF C2 = 68PF 100V C4 = 220uF 63V C5 = 1uF 100V C6 = 220nF 100V C7 = 47nF 100V C8 = 15NF 100V C9 = 5.6nF 100V C10 = 47nF 100V C11 = 15NF 100V C12 = 4.7nF 100V C13 = 1.5nF 100V C14 = 470pF 100V C15 = 68PF 100V C16-19 = 100nF 100V C17-20 = 470uF 40V C18 = 4.7uF 63V RV1 until RV5 = 50Kohms Lin. Q1 to ...

This is Simple Frequency to Vvoltage Converter Circuit Diagram. In these applications, a pulse input at % is differentiated by a C-R network and the negative-going edge at pin 6 causes the input comparator to trigger the timer circuit. Just as with a V-to-F converter, the average current flowing out of pin 1 is IaverAGE = i (1.1 RjC^ f.  In this simple circuit, this current is filtered in the network RL = 100 k ohm and 1 µF. The ripple will be less than 10 mV peak, but the response will be slow, with a 0.1 second time constant, and settling of 0.7 second to 0.1%. Simple Frequency to Vvoltage Converter Circuit Diagram Simple Frequency to Vvoltage Converter Circuit Diagram

Used tubes – 12AX7 [pre-amplifier, tone control and audio pre-amplifier] – 6L6GC [audio output] Circuit diagram Tube pin-out -6L6 Tube pin-out 12AX7

This is the cheapest 150 Watt amplifier circuit you can make,I think.Based on two Darlington power transistors TIP 142 and TIP 147 ,this circuit can deliver a blasting 150 W Rms to a 4 Ohm speaker.Enough for you to get rocked?;then try out this. TIP 147 and 142 are complementary Darlington pair transistors which can handle 5 A current and 100V ,famous for their ruggedness. Here two BC 558 transistors Q5 and Q4 are wired as pre amplifier and TIP 142 ,TIP 147 together with TIP41  (Q1,Q2,Q3) is used for driving the speaker.This circuit is designed so rugged that this can be assembled even on a perf board or even by pin to pin soldering.The circuit can be powered from a +/-45V, 5A  dual power supply.You must try this circuit.Its working great! The preamplifier section of this circuit is based around Q4 and Q5 which forms a differential amplifier. The use of a differential amplifier in the input stage reduces noise and also provides a means for applying negative feedback. Thus over...

Functional Block Diagram of IC 723 Regulator IC 723 has two sections. As shown in the block diagram, A constant current Source:- A zener diode and a reference amplifier producing a constant voltage of about 7 volts at Vref end. The zener diode is being compelled to operate at fixed point (so that zener output voltage is a fixed voltage) by a constant current Source. The second section of IC 723 comprises of an error amplifier, a series pass transistor Q1 and a current limiting transistor. The error amplifier compares a sample of output voltage applied at Inverting input terminal to the reference voltage Vref applied at the Non-Inverting input terminal. The conduction of the transistor Q1 is controlled by the error signal. Back To HOME

T his  automatic  bicycle  light  makes cycling in the dark much  easier (although you still need  to pedal of course). The circuit  takes  the  ambient  light  level  into account and only turns on  the light when it becomes dark.  The light is turned off when no  cycling has taken place for over  a minute or if it becomes light  again. The biggest advantage of  this circuit is that it has no manual controls. This way you can  never ‘forget’ to turn the light  on or off. This makes it ideal for  children and those of a forgetful  disposition. Bicycle Light Image : To detect when the bicycle is  used (in other words, when the  wheels turn), the circuit uses a  reed switch (S1), mounted on  the frame close to the wheel.  A small magnet is fixed to the  spokes (similar to that used with  most  bicycle  speedometers),  which  ...

This is the Ups System mini Circuit Diagram. This Ups System mini circuit provides an uninterrupted  power supply (UPS) to operate 12V, 9V and 5V DC-powered instruments at up to 1A current. The backup battery takes up the load without spikes or delay when the mains power gets interrupted. It can also be used as a workbench power supply that provides 12V, 9V and 5V operating voltages. The circuit immediately disconnects the load when the battery voltage reduces to 10.5V to  prevent deep discharge of the battery.  LED1  indication  is  provided  to  show  the full charge voltage level of the battery. miniature white LEDs (LED2 and  LED3) are used as emergency lamps during power failure at night.  Mini Ups System Circuit Diagram A standard step-down transformer provides 12V of AC, which is rectified by diodes D1 and D2. Capacitor C1 provides ripple-free DC to  charge the battery and to the remaining circuit. When the mains power ...

This is a very basic circuit for flashing one or more LEDS and also to alternately flash one or more LEDs.It uses a 555 timer setup as an astable multivibrator with a variable frequency.With the preset at its max. the flashing rate of the LED is about 1/2 a second. It can be increased by increasing the value of the capacitor from 10uF to a higher value.  For example if it is increased to 22uF the flashing rate becomes 1 second. There is also provision to convert it into an alternating flasher. You just have to connect a LED and a 330ohm as shown in Fig.2 to the points X and Y of Fig.1. Then both the LEDs flash alternately.Since the 555 can supply or sink in upto 200mA of current, you can connect upto about 18 LEDS in parallel both for the flasher and alternating flasher (that makes a total of 36 LEDs for alternating flasher).  Light Flasher Circuit Diagram

This is a 200W ATX PC Power Supply Circuit Diagram. Here I bring you wiring diagram of PCs power supply of DTK company. This power supply has ATX design and 200W performance. I was drawed diagram, when I repaired this power supply.   200W ATX PC Power Supply Circuit Diagram Circuit description This power supply circuit uses chip TL494. Similar circuit is used in the most power supplies with output power about 200W. Device use push-pull transistor circuit with regulation of output voltage. Input part a standby supply Line voltage goes through input filter circuit (C1, R1, T1, C4, T5) to the bridge rectifier. When voltage is switched from 230V to 115V, then rectifier works like a doubler. Varistors Z1 and Z2 have overvoltage protect function on the line input. Thermistor NTCR1 limits input current until capacitors C5 and C6 are charged. R2 and R3 are only for discharge capacitors after disconnecting power supply. When power supply is connected to the line voltage, then at first ...

How to Build a Thermo-Fan To Keep Your Amp Cool Circuit Diagram In many areas of the world, keeping an amplifier cool is no big deal, because of generally low average temperatures.  Thermo-Fan To Keep Your Amp Cool Circuit Diagram

Power supply Regulator  and Back-light Inverter Schematic - Haier LE40C13200 and Haier LE32C13200 - LED LCD TV CLICK ON THE SCHEMATICS TO ZOOM IN

This Mini Voltage Source with Adjustable Current Limit variable is very simple and efficient, ideal for small shippers or circuits that require a current limiter with adjustable voltage that this circuit can vary from a few mA up to 2 A and voltage 1.225v up to 12V or more, depending on the power supply.  Once the current reaches the limit set by the 100R resistor, transistor BC547 begins to act on the voltage regulator in the Adj pin and the output voltage starts to decrease. If the output is shorted, the output voltage will reduce to almost zero, as a kind of protection. Adjustable Voltage and Variable Current Limiter Circuit Diagram Adjustable Voltage and Variable Current Limiter Circuit Diagram

Protect your valuable laptop against theft using this miniature alarm generator. Fixed in-side the laptop case, it will sound a loud alarm when someone tries to take the laptop. This highly sensitive circuit uses a homemade tilt switch to activate the alarm through tilting of the laptop case. The circuit uses readily available components and can be assembled on a small piece of Vero board or a general-purpose PCB. It is powered by a 12V miniature battery used in remote control devices. IC TLO71 (IC1) is used as a voltage comparator with a potential divider comprising R2 and R3 providing half supply voltage at the non-inverting input (pin 3) of IC1. The inverting input receives a higher voltage through a water-activated tilt switch only when the probes in the tilt switch make contact with water. When the tilt switch is kept in the horizontal position, the inverting input of IC1 gets a higher voltage than its non-inverting input and the output remains low. IC CD4538 (IC2) is used as a m...

Ladder logic symbols are the basic building blocks for ladder diagrams. Right here you will find all the ladder diagram symbols which are described in IEC 61131-3. The symbols are available for download in all formats and in a PDF-file. It’s absolutely crucial to know about the symbols when you are working with ladder logic. Each symbol represent a certain ladder instruction. In ladder logic, these symbols are also known as bit logic instructions. The reason for this is that the programming language ladder diagram is designed for boolean signals. Standard IEC Symbols for Ladder Diagrams Ladder Logic Symbols The ladder diagram graphical programming language is standardized by the PLCopen organization, and thereby the symbols used in ladder diagrams. Since ladder logic is a graphical programming language, the PLC programs written in ladder logic are a combination of ladder logic symbols. All the symbols can be found in the standard defining ladder diagram programming: IEC 61131-3. ...

Hi Everyone Yesterday upon visiting my (somewhat) local optometrist, I was advised to look up every 5 minutes or my eyes will stay  Simple Timed Beeper Circuit Diagram Parts: R1______220R    1/4W Resistor R2_______10M    1/4W Resistor R3________1M    1/4W Resistor R4_______10K    1/4W Resistor R5_______47K    1/4W Resistor   C1_______ 100nF   63V Polyester Capacitor C2________22µ F   25V Electrolytic Capacitor   D1______ 1N4148   75V 150mA Diode D2________3mm.   Red LED   IC1_____ 4081    Quad 2 input AND Gate IC IC2_____4060    14 stage ripple counter and oscillator IC   Q1______BC337   45V 800mA NPN Transistor   P1______SPST Pushbutton (Start) P2______SPST Pushbutton (Reset)   SW1_____4 ways Switch (See notes)   PS______Piezo sounder (incorporating 3KHz oscillator)   B1______3V Battery (2 AA 1.5V Cells in series)   Device purpose: This c...