TREE

Amplifier with digital volume control can we make predictably because the circuit is made simple with just single chip TDA8551. The series of Mini Amplifier With Digital Volume Control is a type BTL amplifier with 1 Watt. Techniques for adjusting the volume in this series has been provided with a pin path control that is controlled by providing an input voltage VCC and GND. The series is also equipped with a selector mute, standby and operating. Mini amplifier with digital volume control schematics

Transmitter circuit diagram:  Transmitter parts: R1 68K 1/4W Resistor C1 4n7 630V Ceramic or Polyester Capacitor C2 60-80pF 63V Ceramic Trimmer C3 100µF 25V Electrolytic Capacitor Q1 BC337 45V 800mA NPN Transistor Q2 BD139 80V 1.5A NPN Transistor L1 500 turns on a 10mm. diameter, 10cm. long ferrite rod. Enameled wire diameter: 0.2mm. The tap is made after 200 turns, ground side P1 SPST Pushbutton B1 6-9V Battery (4 to 6 AA 1.5V Cells in series, see Notes)  Receiver circuit diagram: Receiver parts: R1,R3 1M 1/4W Resistors R2,R4 47K 1/4W Resistors R5 330K 1/4W Resistor R6,R7 68K 1/4W Resistors R8 180R 1/4W Resistor R9 100R 1/4W Resistor C1 470pF 63V Ceramic Capacitor (See Notes) C2 10nF 63V Polyester or Ceramic Capacitor C3 100µF 25V Electrolytic Capacitor C4,C5 100nF 63V Polyester or Ceramic Capacitors C6 1µF 63V Polyester, Ceramic or Electrolytic Capacitor D1 5 or 3mm. Red LED Q1,Q2,Q3 BC549C 25V 100mA NPN High-gain Low-noise Transistors Q4 BD328 30V 800mA PNP Transistor L1 70...

Pumping of water into a tank is accomplished by motor operation. When the tank is about to be full with water, the motor pump is about to stops to operate. When the tank is about to be emptied, the motor pump will start to operate. Float Switch Motor Pump Control Operation Figure below (A) shows a tank half filled with water. The motor pump M at idle condition. Water flows out from the gate valve L. Lever C is tilted downward to the right because of the weight W1. Mercury B is at the right position inside the glass container A. the metal rods X and Y inside the sealed glass container A are at open condition. Float bulb K float over the water J inside the tank. Float bulb K goes down as the water drops down. (A) Water is withdrawn from the tank. Water level drops downward. When the water level drops down beyond the stopper E, Figure below (B) the stopper E prevents float bulb K to go down further. When the water level goes down further weight W2 the effect of the combined weight of flo...

In industrial processing operation there are cases where machineries should be started one after the another. One example of electrical control applied to machineries in a processing operation is the sequential control shown in figure below (A) and (B). The 3 motors; M1, M2 and M3 are drive mechanical machine. Motor M1 is first started. After a Pre-set time, Motor M2 is started automatically. Later, with another pre-set time, motor M3 is started. Control Operation The first stage of control operation is started by pressing the start push button switch shown in figure 16 (a). Contactor C, timer TR1, and pilot lamp A are energized. Contact C1 (13-14) will close to maintain contactor C, timer TR1, and pilot lamp A. Contacts C2 (1-2,3-4,5-6) will also closed to energize and operate the motor M1, see figure 16 (b). Likewise the instantaneous timer contact TR1 (1-3) will close to prepare the second stage of operation (A) Control circuit of 3 stages       sequential Control. After the pre-set...

This is a Simple Project of Remote Control Receiver Circuit Diagram. An infrared receiver, or IR receiver, is hardware that sends information from an infrared remote control to another device by receiving and decoding signals.This circuit is based on the Sharp GP1U52X IR module and 1NS8048L microprocessor. The GP1U52X is a hybrid IC/infrared detector that provides a strong clean signal for later filtering and demodulation. Remote Control Receiver Circuit Diagram

3 Band Tone Control circuit uses an op-amp as an amplifier end. Tone Control circuit is a regulator of tone bass, midrange and treble or 3 band called because it can set the three tones. Filter circuit is applied to the series of "Tone Control 3 band" This type baxandal like the title of this article.  Results filtering regulator tone or tone control baxandal type is good, because there is no signal level is wasted directly into the ground. Range frequency tones generated from Tone Control 3 band was determined by the configuration of the R and C of the filter section baxandal. As an amplifier on Tone Control The set of three band use traditional IC LF351 has slewrate high and high input impedance. For more details, series 3 Band Tone Control as follows. Figure Series 3 Band Tone Control 3 Band Tone Control circuit above using LF351 Op-Amp is used to strengthen the signal after filtering by the filter process baxandal. Level tone Bass, Midrange and Treble settings are determi...

How to make a Simple Automatic Street Lights Intensity Control. White LED (Light Emitting Diodes) substitutes HID lanterns in road illumination system to add on dim element. 8051 family’s micro-controller is bring into play to control the power by growing pulse width transformed pointers that impels a MOSFET to swap the Light Emitting Diodes accordingly to accomplish most wanted function. Automatic Street Lights Intensity Control Circuit Diagram In the current system, maximum lightning over the freeways is completed through HID (High Intensity Discharge lamps), the energy utilization of HID lamps/lanterns are high. The intensity of HID lamps cannot be controlled, in harmony to the necessity, therefore there is a requirement to swap to a substitute way of illumination system i.e., by making use of LEDs. This lighting system is constructed to conquer the disadvantages of High Intensity Discharge lamps. This lightning system exhibits the utilization of the Light emitting diodes or LED’s a...

Basic circuit of the LM35 are made to control the fan is either used on amplifier that requires automatic cooling. Its use on power amplifier circuit above and only requires DC fan. From basic sensors based on ic and amplifier op-amp is added again to the transistor Q1 to drive the fan. Part List : R1___220K R2___100K R3___3K3 R4___22K R5___1M R6___150R R7___2K2 R8___33R 4W C1___100pF D1___1N4148 IC1__7915 IC2__TL072 IC3__LM35 F1___DC Fan 12V

This is the simple Remote control tester circuit diagram. When the remote control is not working, first check the battery before, It may be loss.If it is good,so detect transmit infrared light device.However, because the human eye can not see infrared light,so can not know how good or bad.But the photo transistor can use to detect infrared light.  This circuit so use this photo transistor is the light receiver from the remote control.If it is nice to have the bias current of the transistor BC558.It runs a current flows through the LED,so the LED bright.The remote control that works correctly. The variable resistor VR1 is used to adjust the sensitivity of the circuit.  Remote control tester circuit diagram  

Digital Control System  is a branch of the control system with continuous time processes in the region associated with the digital controller as the controller of the control elements that control systems and computing discrete time. Depending on requirements, a digital controller can be shaped microcontroller and ASIC to a standard desktop computer. Because the digital computer system is discrete, then the Laplace transform is used in the control system is replaced with the Z-transform. Therefore, you must understand about the concept of continuous time and discrete time concept. Flow Chart - Digital Control system applications Digital computer also has a limited precision (See quantization) extra care needed to ensure that errors in the coefficients, A / D conversion, D / A conversion, etc. do not produce unwanted effects or planned. The application of digital control can easily be done when used in a feedback form. Since the creation of the first digital computer in the e...

This is a simple speed control temperature DC fan circuit diagram . This simple circuit based on two transistors that can be used to control the speed of a 12 V DC fan depending on the temperature.A thermistor (R1) is used to sense the temperature.  When the temperature increases the base current of Q1 (BC 547) increases which in turn decreases the collector voltage of the same transistor. Since the collector of Q1 is coupled to the base of Q2 (BD 140), the decrease in collector voltage of Q1 forward biases the Q2 more and so do the speed of the motor. Also, the brightness of the LED will be proportional to the speed of the motor.  Simple Speed Control Temperature DC Fan Circuit Diagram Notes. The R1 can be a 15K @ 20°C ,N.T.C  thermistor. The M1 can be a 12V,700mA fan motor. The capacitor C1 must be rated 25V. The circuit can be powered from a 12V PP3 battery or 12V DC power supply. Assemble the circuit on a good quality PCB or common board. Sourced By: Streampowers

Dual pre power amplifier dc volume control

DC12V , 4.4watt/feet, 18leds/feet, 16.4feet/reel. super bright leds, D3 touch controller link: http://www.superlightingled.com/d34a3ch-max-12a-dc1224v-d-series-rgb-touch-panel-highend-controller-for-rgb-color-change-multic-colour-led-strips-lighting-warranty-5-years-p-422.html RGB led strip lights link: http://www.superlightingled.com/rgb-flexible-led-strip-lights-c-3_26.html 100watt power supply link:  http://www.superlightingled.com/100w83a-dc12v-hulled-led-enclosed-switching-power-supply-with-builtin-pfc-p-210.html