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Circuit Diagram and Schematics Nokia N-Gage The NEM-4 (Nokia N-Gage) is a Mobile Game Deck with blast for EGSM900 and GSM1800/GSM1900 networks. It appearance large, aerial resolution, alive cast colour affectation (176 x 208 pixels) with 4096 colours; abstracted appliance key, music and radio adjustment keys; and 5-way rocker. The afterward book contains detail ambit diagram and schematics of Nokia N-Gage alternation which covers: "Connections between RF and BB modules, NEM-4 BB, UPP_WD2 NEM-4, power circuit, NEM-4 AUX Power, UEM, Audio, ADSP and FLASH, FM Radio and Audio Codec, Memories, User Interface, keypad, Card and USB Interface, Accessory Interface, System Connector, LPRF BT102, Test Interface, GSM BB-RF Interface, Connectors Between RF Modules, Power Amplifier, Mjoelner, Testpoints, Component Placement Diagram Bottom, Component Placement Diagram Top."

This is a heavy duty but low-cost Electronic Circuit . The operation amplifier A1 directly drives the VN64GA with the error signal to control the output voltage. Peak rectifier Dl, CI supplies error amplifier A1 and the reference zener. This extra drive voltage must exceed its source voltage by several volts for the VN64GA to pass full load current. Heavy Duty But Low-Cost Battery charger Circuit Diagram: The output voltage is pulsating dc which is quite satisfactory for battery charging. To convert the system to a regulated dc supply, capacitor C2 is increased and another electrolytic capacitor is added across the load. The response time is very fast, being determined by the op-amp. The 2N4400 current limiter circuit prevents the output current from exceeding 4.5 A. However, maintaining a shorted condition for more than a second will cause the VN64GA to exceed its temperature ratings. A generous heat sink, on the order of 1°C/W, must be used.

The USB serial bus can be configured for connecting several peripheral devices to a single PC. It is more complex than RS232, but faster and simpler for PC expansion.Since a PC can supply only a limited power to the external devices connected through its USB port, when too many devices are connected simultaneously, there is a possibility of power shortage. Therefore an external power source has to be added to power the external devices. Circuit diagram: USB Power Booster Circuit Diagram In USB, two different types of connectors are used: type A and type  B. The circuit presented here is an add-on unit, designed to add more power to a USB supply line (type-A). When power signal from the PC (+5V) is received through socket A, LED1 glows, opto-diac IC1 conducts and TRIAC1 is triggered, resulting in availability of mains supply from the primary of transformer X1. Now transformer X1 delivers 12V at its secondary, which is rectified by a bridge rectifier comprising diodes D1 through D4

This Circuit use IC BA518 or you can use the IC BA547 , this is low mono power amplifier. Maximum power output 5W . But this is also low voltage amplifier with minimum voltage require 2 Volt. And maximum voltage 12 Volt .Impedance 8 Ohm , support small speakers. Circuit schematic below : Click image to view large Troubleshooting if circuit not working  : Check components are can be use or not , also check the use avometer or other measuring instrument.  Check the voltage on each component.   If there is a voltage that has not been entered on the components, then see if there is a broken line or short-circuit PCB , thereb inhibiting the incoming flow. Then check  whether the input and output cables are still good or not.

More and more people are using a PC (conventional or notebook) to view films. The VGA output can be used to provide a matching ‘Ambilight’ effect for this. If you restrict your-self to a single RGB LED, you can also draw the power for this circuit from the VGA connector, along with the RGB signals.  The following pins of the 15-way VGA connector (three rows of five pins) are used for  this circuit:  Pin 1:  Red video signal Pin 2:  Green video signal Pin 3:  Blue video signal Pin 5:  GND Pin 9:  +5 V  The video signals for the red, green and  blue channels are available at the RGB out-puts. These signals have an amplitude of 1 to 1.35 V, and they output the screen imagery at the rate of dozens of frames per second. This produces the visible image on the screen. The circuit described here drives an RGB LED according to the average values of each of these three signals. Of course, this is not a full-fledged ‘Ambilight’ system, but the RGB LED will produce a nice green light during a  foo

The main source of power in a telecommunications system is -48 V. This source’s negative polarity and its large magnitude with respect to ground pose a challenge when designers want to use low-power ICs in the telecom system’s application circuits. Fortunately, the emergence of high-voltage ICs with operating voltages of 75 V and higher has enabled the use of simple biasing techniques in designing circuits for -48-V systems. The technique described here provides a dimming control for an LED. The circuit uses a 65-V hysteretically controlled LED driver (MAX16822A) with its ground pin connected to -48 V and its power input connected to the system ground (Fig. 1). For proper dimming, therefore, the circuit’s logic-level control signal (at Control) must be level-shifted down to –48 V and applied to the DIM input. The high-voltage pnp transistor (CMPT5551) (80 V/500 mA) enables a simple solution to that problem. Logic-Level Signals Dim -48V LED Driver Circuit Diagram The transistor circuit

Many bathrooms are fitted with a fan to vent  excess humidity while someone is showering. This fan can be connected to the light  switch, but then it runs even if you only want  to brush your teeth. A better solution is to  equip the fan with a humidity sensor. A disadvantage of this approach is that by the time  the humidity sensor switches on the fan, the  room is already too humid. Consequently, we decided to build a circuit  that operates by sensing the temperature of  the hot water line to the shower. The fan runs  as soon as the water line becomes hot. It continues to run for a few minutes after the line  cools down, so that you have considerably  fewer problems with humidity in the bathroom without having the fan run for no reason. Naturally, this is only possible if you can  fit a temperature sensor somewhere on the  hot water line and the line does not become  warm if hot water is used somewhere else. We use an LM335 as the temperature sensor.  It generates an output voltage

ET-5EC-K04/ET-5EC-K61/ET-5EE-K06 (Tuner) – TDA8897/TDA8899 (System control chroma jungle) – STR W6556A – LA78041/TDA8177 (Vertical scan output) – TA1343 (Audio processor) – AN7522/AN17821 (Audio output) – 24C08 (System memory) Circuit Diagram [Click on the circuit diagram to zoom in]

This circuit is a very simple voltage monitoring device for +5V VCC supply lines. It can be used to monitor the power supply of a microcontroller (uC) by indicating when the supply level raises above a pre-defined value. The output of the circuit can interface directly to digital logic, reset the microcontroller or turn off the connected microcontroller circuitry before it goes toasted owing to an improper power supply voltage. The ‘proof of concept’ is verified using the eternal single supply dual operational amplifier LM393. However, feel free to try other possible alternatives like LM2903, LM193, etc. The LM393 consist of two independent voltage comparators that are designed to operate from a single supply over a wide range of voltages (2V-36V). The outputs can be connected to other open-collector outputs to achieve wired-AND relationships. The comparator compares two voltages, IN1 at the inverting (–) input and IN2 at the inverting (+) input. When IN2 < IN1, the comparator outpu

Low distortion Class-B circuitry 6V Battery Supply Some lovers of High Fidelity headphone listening prefer the use of battery powered headphone amplifiers, not only for portable units but also for home "table" applications. This design is intended to fulfil their needs and its topology is derived from the Portable Headphone Amplifier featuring an NPN/PNP compound pair emitter follower output stage. An improved output driving capability is gained by making this a push-pull Class-B arrangement. Output power can reach 100mW RMS into a 16 Ohm load at 6V supply with low standing and mean current consumption, allowing long battery duration. The single voltage gain stage allows the easy implementation of a shunt-feedback circuitry giving excellent frequency stability. Battery-powered Headphone Amplifier Circuit diagram Notes: For a Stereo version of this circuit, all parts must be doubled except P1, SW1, J2 and B1. Before setting quiescent current rotate the volume control P1 to t

Respiratory System Diagram Labeled diagram of the ... Air enters the nose through ... What is the Respiratory System ... ... of The Respiratory System Human Respiratory System Please signup & upgrade Human Respiratory System ... Respiratory System. ... The respiratory system.

The Mantis 9.1 design is a radical departure from version 8 and earlier. Most notably, the part count has been almost halved! The current design has 13 parts, all of which can be made with a handsaw and a drill press. Also, I’ve traded away my alignment free exactly-constrained design for extra stiffness. Several unsuccessful attempts to eradicate the last of the slop in the Z axis on version 8 lead me back to the world of over-constrained parallel rods. My previous attempts at an over-constrained design (versions 1-5) all failed because I was unable to make the rods sufficiently parallel to avoid jamming. What to do? [ ]

The treble control works in a similar manner as the bass control elsewhere in this site, but contains several modifications, of course. One of these is the series network C1-C2– R1– R1 1. The d.c. operating point of IC3 is set with resistors R12 and R13. To ensure that these resistors do not (adversely) affect the control characteristics, they are coupled to the junction of R9 and R1 0. In this way they only affect the low-frequency noise and the load of the opamp. Their value of 10 kΩ is a reasonable compromise. The functions of switches S1– S3 are identical to those of their counterparts in the bass tone control; their influence is seen clearly in the characteristics. Circuit diagram: Treble Tone Control Circuit Diagram Good symmetry between the left-hand and right-hand channels is obtained by the use of 1% versions of R1– R1 3 and C1, C2. The value of resistors R2– R1 0 is purposely different from that of their counterparts in the bass tone control. In the present circuit, the cont

The switch-disconnector or Isolator seitch is largely used as the main switch in low and high voltage switchgears for distribution of power, starting and stopping motors and isolating loads during maintenance. They are also enclosed in metal or plastic boxes as safety switches to ensure that accidental start of machines is prevented. The range from 16 to 160 Amp are either base plate or door mounted by snap-on or screw fitting. Front operated 3-, 4-, 6-, 8-pole and change over types are available as standard. From 200 up to 3150 Amp the switch-disconnectors, also called load break switches, are designed as pole modules and they are available as 1- to 4-pole versions, front or side operated. From 200 up to 3150 Amp the switch-disconnectors, also called load break switches, are designed as pole modules and they are available as 1- to 4-pole versions, front or side operated.

In this article we will discuss how can you make PCBs using Eagle Layout Editor 5.6 Freeware (PCB design). First of all Open Eagle , under Projects right click and then left click to New Project . Give a name to the new Project , for example ‘ example’ and then click Enter . Right click the example , you created, and select New and then board. We will design a simple led chaser using PIC16F84a micro-controller. Add the component needed for this circuit by clicking on ‘ADD’ icon from tool panel in left. After arranging the components we get the figure like this: You can also assign the name to the component by selecting ‘name’ icon and then chose the component which is to be named. Now select the ‘wire’ icon, and the color for wire (normally I chose red). After tracing select the ‘polygon’ icon and draw a polygon (across the whole circuit), after doing this click on ‘Ratsnest’ and you will get this: Now give the name to the polygon (for example Vcc,Vss et