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Want a high quality audio that lets you enjoy those amazing music at home? Take a look at db60, the wall mounted Bluetooth speaker should be a nice solution. The db60 is a premium quality, award-winning Bluetooth wireless speaker that measures 268 x 195 x 160mm and weights 4.5kg. As we can see from the images, the wireless speaker features sleek modern design, and comes with a specially designed shielded 4-inch Coaxial driver that is actually two drivers in one in order to produce high-quality room-filling audio for your favorite music. Moreover, the Bluetooth speaker also has an extra 3.5mm audio jack for other non-Bluetooth music players, and an built-in USB port allows to charge your smartphone just like a USB charger, while the integrated wing keeps your device in place when it’s charging do connecting with the wireless speaker. Apart from that, its mount system allows you to easily mount the wireless speaker on the wall. At present the team of the db60 is raising fund at Kickstart

Compressor Circuit with 570/571 Compandor IC circuit provide high gain for low amplitude input and provide low gain for high amplitude input. This action, in effect, produce a nearly constant amplitude even though the input has very high dynamic range (very high amplitude variation from time to time). The action of compression like this is needed in some situation, such as in maximizing modulation depth in broadcasting, or sustaining electric guitar signal which has very high variation between the plucking time and fading out.  The following circuit has complementary input/output characteristic and unity gain at 0.775 VRMS input. Voltage gain through compressor is square root of 0.7/Vin. Vin is average input voltage. This circuit  uses Signetics dual channel compandor IC.  570 has lower inherent distortion and higher supply voltage range (6-24 V) than 571 (6-18 V). Compressor Circuit with 570/571 

This Electronic Circuit Project of simple but digital electronic Lock circuit. The digital lock shown below uses 4 common logic ICs to allow controlling a relay by entering a 4 digit number on a keypad. The first 4 outputs from the CD4017 decade counter (pins 3,2,4,7) are gated together with 4 digits from a keypad so that as the keys are depressed in the correct order, the counter will advance.  As each correct key is pressed, a low level appears at the output of the dual NAND gate producing a high level at the output of the 8 input NAND at pin 13. The momentary high level from pin 13 activates a one shot circuit which applies an approximate 80 millisecond positive going pulse to the clock line (pin 14) of the decade counter which advances it one count on the rising edge. A second monostable, one shot circuit is used to generate an approximate 40 millisecond positive going pulse which is applied to the common point of the keypad so that the appropriate NAND gate will see two logic hig

A novel supply voltage monitor which uses a LED to show the status of a power supply. This simple and slightly odd circuit can clearly show the level of the supply voltage (in a larger device): as long as the indicator has good 12 volts at its input, LED1 gives steady, uninterrupted (for the naked eye) yellow light. If the input voltage falls below 11 V, LED1 will start to blink and the blinking will just get slower and slower if the voltage drops further - giving very clear and intuitive representation of the supply's status. The blinking will stop and LED1 will finally go out at a little below 9 volts. On the other hand, if the input voltage rises to 13 V, LED2 will start to glow, getting at almost full power at 14 V. The characteristic voltages can be adjusted primarily by adjusting the values of R1 and R4. The base-emitter diode of T2 basically just stands in for a zener diode. Supply Voltage Indicator Circuit diagram: Supply Voltage Indicator Circuit Diagram The emitter-colle

Power amp 400W IRFP448 Circuit Amplifier circuit today,We would like to show you for the MOSFET 400 watt amplifier is amplifier on my kW shares the same circuit and basic PCB layout.   The only real difference is the number of output devices to the device.   We have using The IRFP448 design while the MOSFET amplifier 14 O / P devices.   These amplifiers can be used for virtually any application that requires high performance, low use Noise, distortion and excellent sound quality. Examples would be subwoofer amplifier should FOH stage   Amplifiers, surround a canal a very powerful sound amplifier, etc.   The 400W MOSFET-amplifier has four key stages of amplification. We are looking to start any   Phase appropriate detail. The bias and buffer stage   As the name suggests All Q ,C and ZD the Bias and buffer phases. Its main goal is to provide a stable MOSFET Gates  and offset voltage and the voltage buffer amplifier stage of the High Resource capacity. What would have without the phase re

      The P-N junction diode is appeared in the year 1950. It is the most essential and the basic building block of the electronic device. The PN junction diode is a two terminal device, which is formed when one side of the PN junction diode is made with p-type and doped with the N-type material. The PN-junction is the root for semiconductor diodes. The various electronic components like BJTs, JFETs, MOSFETs ( metal–oxide–semiconductor FET ), LEDs and analog or digital ICs all supports semiconductor technology. The main function of the semiconductor diode is, it facilitates the electrons to flow totally in one direction across it. Finally, it acts as a rectifier. This article gives a brief information about the PN junction diode, PN junction diode in forward bias and reverse bias and the VI characteristics of PN junction diode What is a PN Junction Diode? There are three possible  biasing  conditions and two operating regions for the typical PN-Junction Diode, they are: zero bias, forw

OPERATING MODES OF TRANSISTOR Commonly a Transistor has two junctions (Emitter-Base and Collector-Base Junctions), and each of these two junctions may be either Forward Biased or Reverse Biased . Therefore, there are Four Possible configurations can be made to bias these Junctions . Accordingly transistor may operate in different conditions. It is easy to understand the various configurations of Transistors and the region of operation by take a look on the Tubular Column. sl.no. Biasing Condition Emitter Base Junction Collector Base Junction Operation Region 1 Forward-Reverse Forward Biased Reverse Biased Active 2 Forward-Forward Forward Biased Forward Biased Saturation 3 Reverse-Reverse Reverse Biased Reverse Biased Cut-off 4 Reverse-Forward Reverse Biased Forward Biased Inverted 1. Forward-Reverse Biasing It is the normal biasing of a transistor in which the EMITTER-BASE Junction is Forward Biased and the COLLECTOR-BASE Junction is Reverse Biased. This

Around us will be a large amount of energy scattered in space, are the RF waves emitted by TV channels, radios, cell phones, computers, etc.. What most people do not know is that we can capture the scattered energy and transform into electricity.  To capture any wave, we have to have a coil in the same resonant frequency, we can also simply capture radio signals by a common antenna and light an LED if we get a strong signal.Setup is simple. You will need an antenna too high, most likely on roof or on top of a mast and make sure that isolated and fixed. Then connect the enameled copper wire antenna and take it to the circuit. Power of the environment by using an antenna Circuit

Oscilloscope screen capture of output from the audio player Top - left channel Bottom - right channel Using the PIC32MX250F128B, I decided to make a simple audio player. I wanted to play back good quality audio from a large memory space - a microSD card. So, I made this WAV player that can play back 16-bit 44.1kHz WAV files with 12-bit stereo audio output. Of course that's not all it can play back. It is programmed for automatic period configuration so that the period is set on the fly based on the song sample rate. It can play back both 8-bit and 16-bit mono and stereo audio files and I have tested from 8kHz 8-bit mono to 44.1kHz 16-bit stereo. The player itself does not include an audio amplifier to drive speakers but can drive earphones. I've used an external stereo speaker for testing. The hardware is fairly simple! Using the Microchip Memory Disk Drive File System (MDDFS) library, and my previous work using the MCP4822 dual 12-bit DAC, integrating these components to make

What is PIR ? Passive Infrared Sensor Circuit Diagram . Detectors or pyroelectric sensors, passive infrared or PIR sensor, are made of a crystalline material that generates an electric charge on the surface when exposed to heat in the form of infrared radiation. When radiation increases the amount of electrical charge increases too and this load is measured with a sensitive FET transistor which is inside the sensor module. With the RIP is commonly used as a motion detector of an object by detecting the infrared signal radiated from the object (people and animals). The Passive Infrared Sensors are also used in remote thermometers. Pinning PIR sensor Pin 1 of the PIR must be connected to the positive supply 5V DC. Pin 2 is the output of PIR sensor, it must have a connection to the earth through a resistor of 47K to 100K (depending on the circuit). Pin 3 of the RIP must be connected to ground or negative circuit. Simple Circuit Diagram using PIR Sensor Simple circuit motion sensor PIR det

Control cable length Q) How do I calculate the critical length on control cable for contactor? The permissible length of cable (m) can also be calculated by using the formula below: U : Rated coil voltage dU : Voltage drop ( 5%) Son : Coil VA / W at pick up Cos φon : p.f of coil at pick up R: Ohmic resistance/cable values as tabulated When long control cables are used for actuating the contactor, large voltage drop may occur causing chattering of the contactor or even failure to pick up. If the length of the cable exceeds L, use of higher size of cable or use of contactor relay is suggested as shown in fig. ..

I have already written a brief post on how to use KEIL uVision in which I deliberately left the debugging part out because I wanted to talk about it at a proper time. I think it's now. If you haven't noticed it yet, KEIL uVision is also a debugger and will help you debug many of your codes and programs. The debugging environment of KEIL is very simple to understand and make use of. Today, I will introduce you to it. Ready? UPDATE: You can also click this link for an updated version of this post. READ MORE

This circuit will light a lamp at a remote location when the doorbell switch is pressed. This circuit should only be used with the solenoid type doorbells, the electronic type that play tunes will not work here.  It is quite easy to miss the sound of a doorbell if you are watching TV , this circuit gets round the problem by providing a visual indication. As an alternative, a LED could also be used. You could just parallel a lamp across the doorbell, but this would mean extra drain from the doorbell batteries or transformer. A series resistor, R1 is wired in series with the doorbell and reduces current flow, thereby increasing battery life. The value of R1 is chosen so that about 0.6 to 0.7 volts is developed across it, when the doorbell switch is pressed. I used a combination of a 22 ohm resistor in parallel with a 50 ohm. The voltage drop across R1 is sufficient to switch on the transistor, the lamp in series with the collector will then illuminate. I also used an electromechanical co

Simple 3 volt to 9 volt with LMC555 Circuit Diagram . This is a Build a 3 volt to 9 volt with LMC555 Circuit Diagram. This dc converter is built with the CMOS version of 555 timer. You can get 12V too if you change the zener diode to a 12V version. 3 volt to 9 volt with LMC555 Circuit Diagram

1.Human Machine Interface indirect register ＊ $ arithmetic application. 2. Overview: Delta Terminal Panel DOP HMI offer 65536 indicator registers ＊ $ for user application.When HMI direct connect to AC Motor Drive or AC Servo Drive or Temperature Controller without through Programmable Logic Controller. We can utilize HMI’s Marco instruction to performed various mathematics operation, Do this can simplify programming and less procedure for debugging. On Temperature-Controller, DTB can collected maximum 64 heating curve and times most, Following example we utilize HMI indirect register ＊ $ to finish the adding of all the times. 3. Configuration: Utilize the Macro function of HMI, reveal after adding the sum total of a lot of registers of DTB Temperature Controller. 4. Application benefit: Basic addition way: Register 1----> Register 2--->  Register 3---> Register 4---> Register 5---> Register 6 Normally, While adding above 6 register, must write 6 lines of addition

This is the Simple Audio Pre-Amplifier Circuit Diagram This simple circuit provides good gain to too audio singnals . Use it in main of an RF oscillators to make an RF transmitter that is very sensitive to sound Audio Pre-Amplifier Circuit Diagram

As the amplifier circuit also uses a number of frequencies to drive the loudspeaker, the bass frequencies will be reduced. Therefore need to be plugged the bass-boost control at fedback loop amplifier, this is done to overcome the decline in quality. Graph bass can reach a maximum at +16.4 dB @ 50Hz. This circuit can be connected directly to the CD player, tuner, and tape recorders. Q3 and Q4 must be in pairs with a heatsink. Adjust the volume control at minimum position and R3 with a minimum value of resistance as well. try enabling circuit R3 da set up to read the flow of about 20 to 25mA. Wait for 15 minutes, connect the ground at J1, P1, C2, C4 C3dan. Connect also C9 at the output ground. For his series of power supply you can use the following scheme that fits perfectly with this amplifier.