Electronics: Juli 2011

Jumat, 22 Juli 2011

Hi-Fi

- - - LPF DC Operating Point ---V(supply): 6 VV(out): 2.0419 VV(d): 5.35688 VIc(Q5): -0.645428 mAId(J1): 1.04209 mAThe audio filter circuit that I designed in did not use the notch but is an S-K (Sallen-Key) 3 pole design. It...

DDS AD9851

DDS AD9851 for the HF + 6M Transceiver RadioDirect Digital Synthesis (DDS) is a frequency generator with digital synthesis using a reference clock. The principle is no different from the PLL (phase locked loop), only the PLL uses a VCO to generate the...

Kamis, 21 Juli 2011

Hi-Fi audio

Hi-Fi audioThis circuit is a simple audio amplifier based on TDA1910 IC. This circuit will deliver 10W power output if used 8 ohm loudspeaker and powered with 24V DC supply.Note* Use 18-24V DC for powering the circuit.* A proper heat sink is necessary...

PIR

A normal electronic security system will have a transmitter and a receiver. The transmitter sends out an IR laser and this will be received by the receiver. When an intruder walks past the device, the IR beam is cut and thus the alarm is activated. But,...

audio power

TDA2009 is an audio power amplifier double hi-fi in multiwatt package, especially developed for applications of high quality stereo. That application is the amplification in bridge, where it is used the two amplifiers interns of the tda2009. The good...

Jumat, 15 Juli 2011

LM2575

The switching regulator power supply used LM2575-5.0 on this schematic. You can make the stable voltage by using the 3 terminal regulator like LM317. However, because the output electric current and the inputted electric current are the same approximately,...

ZN414 IC

At this point it is worthwhile downloading the data sheets. Search for data on not just the ZN414, but the other clones as well.One of the Ferranti sheets is available here on the Jaycar site.Briefly, the tuned circuit is fed straight into the IC. There...

IC-7800

The IC-7800 uses durable mechanical relays for BPF switching instead of non-linear semi-conductors, like switching diodes which can cause distortion. The mechanical relay reduces secondary distortion at the primary stage of signal processing.The IC-7800’s...

SCR

A rudimentary test of SCR function, or at least terminal identification, may be performed with an ohmmeter. Because the internal connection between gate and cathode is a single PN junction, a meter should indicate continuity between these terminals with...

Selasa, 12 Juli 2011

Zener breakdown

The Zener diode is particularly interesting in the way that it operates. There are actually two mechanisms that can cause the breakdown effect that is used to provide the voltage reference effect:Zener breakdown: Although the physics behind the effect...

Low Drop-out

Important considerations when selecting a voltage regulator include: 1) the desired output voltage level and its regulation capability; 2) the output current capacity; 3) the applicable input voltages; 4) conversion efficiency (Pout/Pin); 5) the transient...

voltage regulator

Typically, electronic voltage regulators employ a feedback network, where a high-gain amplifier compares a fraction of the load voltage VL/k with a constant reference Vref. Any difference between these two voltages is amplified and used to control a...

Minggu, 10 Juli 2011

How it Works and Functions Each transformer:

Understanding the transformer or transformers in brief is to energize the electromagnet components or electrical power from high voltage to low voltage or vice versa, with equal frequency. When utility power is interrupted, the officer will check the...

Transformer isolation and its use

isolation transformer is an isolation transformer is designed to overcome the problems associated with internal insulation to ground reference. It is built with two rolls of Faraday isolation between primary and secondary windings.isolation transformer...

Distribution transformers and parts

The distribution transformer is a very important component in the distribution of electricity from distribution substations to consumers. Damage to the Distribution Transformer cause kontiniutas customer service will be disrupted (occurring power outages...

electrical transformer and some of its components

Transformer or power transformer is a device used to convert AC line voltage, transformers made from two coils wrapped around a soft iron ring.The coil is connected to a voltage source called the primary coil and the coil where the result is called the...

Zener diode

For those of you who like to dwell with digital circuits, the power supply circuit above can be selected to meet your supply for digital circuits. Actually you could make with no power supply using zener diode as a voltage stabilizer. But by using a...

Sabtu, 09 Juli 2011

junction field effect transistor (JFET)

The circuit was designed to provide a means for measuring the operating voltage of zener diodes before applying on a circuit.Zener Diode – a special kind of diode that permits the flow of current in just one or forward direction as a normal diode, but...

Selasa, 05 Juli 2011

LED drivers

Intersil's new LED drivers provide the best accuracy of the current industry and channels are suitable for small-medium LCD backlight on smartphones, tablets and sub-notebooks.The ISL97682, ISL97683 and ISL97684 is a compact 2 -, 3 -, 4-channel LED...

MLCC

Choosing the best chip multilayer capacitors (MLCC) for an application can involve a difficult trade-offs involving stability, capacitance and cost. European passive component manufacturer, Syfer Technology has introduced various devices that increase...

GPS

The GPS system is run by the U.S. Department of Defense. It consists of 24 operational satellites although there are some extras in orbit as spares in case of catastrophic failure even if each satellite is built to last for ten years. Navstar satellites...

Senin, 04 Juli 2011

Antenna diplexer

Antenna diplexerA brief overview, a tutorial on the basics of antenna or RF diplexer diplexer used for purposes including enabling a single RF antenna for use by several transmitters .An antenna or RF diplexer diplexer is a unit in a single application...

RF Antenna

RF Antenna or antenna does not radiate the same in all directions. It is found that any realization of RF antenna design will radiate more in some directions than others. The actual pattern depends on the type of antenna design, size, environment and...

Electronics