Diagram Plus guide

The designer of this circuit had fitted two (waterproof) loudspeakers in his bathroom and connected them to the stereo system in the living room via a long cable. Naturally, this promptly led to the desire to be able to use the remote control unit from the bathroom. Commercially available extension sets for this purpose were judged to be unsatisfactory, primarily because they require an additional IR transmitter diode to be fitted in front of the amplifier. Although the repeater shown here requires...

The AN7147 Dual 5.3-watt Audio Power Amplifier from Panasonic is listed as a ‘replacement type’ so hopefully will be around for some time to come. Together with some extra components, it can represent a simple surround-sound system requiring no opamps or a negative voltage supply. As shown by the circuit diagram the basic stereo amplifier is changed into a surround-sound system by a trick called ‘adding feedback from the opposite channel’. When surround sound is required, the negative feedback signals...

Most dimmers use pulse width modulation (PWM) to control the amount of power that is delivered to the lamp. Those that come bundled with a switch faceplate control the firing angle of a Triac on the 240V mains side. These work fine with resistive loads but may not be suitable for inductive loads such as low-voltage halogen lamp transformers. This circuit also employs PWM but it switches at a high frequency (22kHz) on the low-voltage side of the lamp transformer. This high frequency also simplifies...

30 minutes operation, Blinking LED signals 6 last minutes before turn-off The purpose of this circuit is to power a lamp or other appliance for a given time (30 minutes in this case), and then to turn it off. It is useful when reading at bed by night, turning off the bedside lamp automatically in case the reader falls asleep... After turn-on by P1 pushbutton, the LED illuminates for around 25 minutes, but then it starts to blink for two minutes, stops blinking for two minutes and blinks for another...

Circuit Diagram:  Active High Pass Filter Circuit Diagram This is active high pass filter circuit for 327Hz frequency using LM741. It will use to build Harmonic at 3 of 130.81 frequency have the value at least. More than the frequency Fundamental 30 dB, for output be sawtooth wave form for use in sound of music way system Electronic design will use the circuit filters three rank frequency. By have 3 dB you slopes can use Op-amp IC number LM741 or number LF351it will meet the frequency well....

PHONE BROADCASTER ELECTRONIC CIRCUIT DIAGRAMThe automatic switching consists of resistors R1-R3, variable resistor VR1 as the regulator, transistor T1 and T2, zener diode D2, and diode D1. R1 and VR1 is useful as an input voltage divider from the telephone line.Parts list :    Resistor R1-R2, R4 : 47k ohm    Resistor R3 : 100 ohm    Resistor R5 : 22k ohm    Resistor R6 : 1M ohm    VR1 : 100k ohm    Diode D1...

Here is the circuit of a simple electric window charger. With a couple of minor circuit variations, it can be used as an electric fence charger too. A standard 12V, 7Ah sealed maintenance-free (SMF) UPS battery is required for powering the entire unit. Any component layout and mounting plan can be used. However, try to keep the output terminals of transformer X1 away from the circuit board. Timer NE555 (IC1) is wired as a free-running oscillator with narrow negative pulse at the output pin 3. The...

A simple NiCd charger can be built using ‘junk box’ components and an inexpensive LM317 or 78xx voltage regulator. Using a current limiter composed of R3 and a transistor, it can charge as many cells as desired until a ‘fully charged’ voltage determined by the voltage regulator is reached, and it indicates whether it is charging or has reached the fully charged state. If the storage capacitor (C1) is omitted, pulsed charging takes place. In this mode, a higher charging current can be used, with...

Using just two NAND or inverter gates its possible to build a D type (or ‘toggle’) flip-flop with a push-button input. At power-up the output of gate N2 is at a logical ‘1’, ensuring that transistor T2 is switched off. When the push-button is pressed the output of N2 changes to a logical ‘0’ and transistor T2 conducts. The coupling between N1 and N2 ensures that the output of N1 will always be the inverse of N2 so T1 and T2 will always be in opposite states and will flip each time the push-button...

This circuit may be used to replace the single current limiting resistor often found in dirt cheap battery chargers. The alternative shown here will eventually pay off because you no longer have to throw away your NiCds after three months or so of maltreatment in the original charger. The circuit diagram shows an LM317 in constant-current configuration but without the usual fixed or variable resistor at the ADJ pin to determine the amount of output current. Also, there is no switch with an array...

This circuit substitutes two white Luxeon 1W Star LEDs for the inverter and fluorescent tube in a standard battery-backed illuminated exit sign, as used in commercial premises. While the Luxeons have less light output than a standard small fluorescent tube, their directional light is quite adequate for the purpose and they do result in less current drain from the battery. However, the use of a 6V SLA battery for this application means that it can be completely discharged if the 240VAC mains supply...

Small and portable unit, Suitable for normal-type devicesThe modern mechanic switches are improved concerning of old technology. We need however many times to replacement some old switch or to check currents bigger than the durability of certain switches or simple we need something with modern appearance. For he and different reasons is essential the up circuit. It is simple in the manufacture and the materials that use they exist everywhere.Circuit diagram:Touch Activated On Off SwitchParts:R1...

Fuse Box BMW 328i 1999 Engine Compartment Diagram - Here are new post for Fuse Box BMW 328i 1999 Engine Compartment Diagram.Fuse Box BMW 328i 1999 Engine Compartment Diagram Fuse Panel Layout Diagram Parts: inside mirror electrochromic, interior light, light module, make up mirror light, navigation, on board computer, outside mirror, parking aid, passenger compartment, radio, rain sensor, rear wiper, roler sun blind, secondary air pump, side airbag, socket, speed control, starter interlock, telephone,...

Integrated AF power amps have seen great improvements in recent years offering improved power and easier use. The TDA1519C from Philips contains two power amplifiers providing 11 W per channel stereo or 22 W mono when the two channels are connected in a bridge configuration. The special in-line SIL9P package outline allows the chip to be conveniently bolted to a suitable heatsink. The TDA1519CSP is the SMD version, in this case the heat sink is mounted over, and in contact with, the top surface of...

The voltage regulators from the 78xx-series are found in many analogue power supplies. It seems, then, somewhat superfluous to say much more about them. But on the other hand, it can be very useful to highlight the important points, just because they are so ubiquitous. The 78xx is almost always used ‘bare’, because additional components are almost unnecessary. In fact, only one additional component is required, and that is capacitor C2. Based on the manufacturer’s recommendation, this capacitor should...

This circuit can be used for inductive pick-up elements and dynamic microphones Most soundcards have a ‘line’ input and one for an electret (condenser) microphone. To be able to connect an inductive tape-recorder head or a dynamic microphone, an add-on preamplifier is needed. Even in this day and age of integrated microelectronics, a transistorised circuit built from discrete part has a right of existence. The preamplifier described in this short article goes to show that it will be some time before...

A power supply suitable for use with the 60W amplifier presented in the predeeding project is perfectly simple, and no great skill is required to build (or design) one. There are a few things one should be careful with, such as the routing of high current leads, but these are easily accomplished. The first thing to choose is a suitable transformer. I suggest toroidal transformers rather than the traditional "EI" laminated types because they radiate less magnetic flux and are flatter, allowing...

It is not always immediately obvious whether a power-consuming appliance is switched on or not. Examples are the lamp in the attic or the shed, or electric heating in an awkward place. A nice solution would be to connect an LED directly in series with the appliance, unfortunately you’d better duck for cover if you tried… The obvious solution would be to place a (power-) resistor in series with the load and connect an LED with series resistor across it.However, this solution has significant disadvantages,...

1966 ford thunderbird Wiring Diagram(click for full size image)The Part of 1966 ford thunderbird Wiring Diagram: fuse block, stop light switch, backup light switch, neutral safety switch, blower motor, temp gauge, oil switch, breaker, alternat...

Fuse Box BMW Z4 2005 Coupe Diagram - Here are new post for Fuse Box BMW Z4 2005 Coupe Diagram.Fuse Box BMW Z4 2005 Coupe Diagram Fuse Panel Layout Diagram Parts:air bag, ASC/DSC, CD charger, central locking system, low beam headlight, lighting circuit, high beam headlight, brake light, interior and luggage, cigar lighter, side light, turn indicat...

Fuse Box BMW 02 Touring 1971 Diagram - Here are new post for Fuse Box BMW 02 Touring 1971 Diagram.Fuse Box BMW 02 Touring 1971 Diagram Fuse Panel Layout Diagram Parts: parking, side light, license plate light, instrument lighting, fog warning light, fog lamp relay, low beam headlight, indicator flasher, cigar lighter, clock, insterior light, hazard warning flasher, trailing turn indicator, heater blower, fuel pump, automatic choke, fuel gauge, coolant thermometer, oil pressure telltale, stop light,...

1996 Chevrolet Camaro Z28 Wiring DiagramThe Part of 1996 Chevrolet Camaro Z28 Wiring Diagram: instrument cluster, tachometer, black wire, yellow wire, red wire, crankshaft, power distribution,camshaft position sensor, tachometer output, sensor ground, sensor ignition positive voltage, tachometer output, reference sigal, knock sensor, srankshaft position sensor, underhood electrical center, sensor ignition positive voltage, bypass control, powertrain control modu...

Daylight harvesting is becoming increasingly important in the design and implementation of commercial lighting systems. Being able to integrate the natural light from windows with flexible, controllable sources of lighting helps improve the work environment and cut energy bills.Being able to have closer control of the lighting systems in a commercial environment is a key element to this strategy and energy harvesting can play an important role. Being able to have flexible placement of control...

  This cell phone jammer operates at GSM800 frequency since most mobile phones use it to operate. So the selected VCO is a sweeping oscillator, which is very effective but may be hard to construct for the beginners without nice RF-testing equipment.As a noise source you can use 45MHz clock oscillator which is driving Local Oscillator port located on a mini-circuit mixer. There is also an impedance matching network for Local Oscillator signal to pass through it. It is used to equate impedances...

When testing a circuit, a source of voltage that is variable and has over voltage shutdown is veiy useful. In this circuit, Rl is adjusted to 1 to 2 V below the eventual shutdown threshold. R2 sets the trip voltage. When this voltage is reached, the circuit shuts the voltage to the circuit under test down. To reset, reduce Rl below trip threshold and depress reset switch SI.Over voltage Protection Circuit Diag...

Compressor Bleed Air Valve Actuation createSummaryAndThumb("summary8042992592978244741...