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A 6 watt audio amplifier circuit using TDA2613 is shown here. TDA2613 is an integrated Hi-Fi  audio amplifier IC from Philips Semiconductors. The IC is switch ON / switch OFF click proof, short circuit proof, thermally protected and is available in 9 pin single in line plastic package. In the given circuit, TDA2613 is wired to operate from a single supply. Capacitor C4 is the input DC decoupler while capacitors C5, C6 are power supply filters. Input audio is fed to the non inverting input through capacitor C4. Inverting input and Vp/2 pins of the IC are tied together and connected to ground through capacitor C3. Capacitor C2 couples the speaker to the ICs output and the network comprising of capacitor C1 and resistor R1 improves the high frequency stability. Circuit diagram Notes. Assemble the circuit on good quality PCB. Supply voltage (Vs) can be anything between 15 to 24V DC. Heat sink is necessary for TDA2613. Do not give more than 24V to TDA2613.

The circuit of the running light comprises two integrated circuits (ICs), a resistor, a capacitor and seven light-emitting diodes (LEDs), Decade scaler IC2 ensures that the LEDs light sequentially. The rate at which this happens is determined by the clock at pin 14. Circuit diagram : 6-Channel Running Light Circuit Diagram The clock is generated by IC1, which is arranged as an astable multivibrator. Its frequency is determined by R1-C1. The touch switch, consisting of two small metal disks is optional. When switch S1 is in position ‘off ’, the circuit may be actuated by the touch switch. By the way, this enables the circuit to be used as an electronic die (in which case the LEDs have to be numbered from 1 to 6). The running light is powered by a 9 V battery or mains adaptor. It draws a current not exceeding 20 mA.

For controlling the load of appliances such as cooling fans, low-wattage heaters, thermostats, low-wattage light sources, small electrical toys and test benches for loudspeakers, we need a power source whose voltage can be controlled in small steps and is capable of providing current of more than 1A. For that, we require low-resolution digital-to-analogue converters (DACs) with three to seven bits. Here is the circuit capable of setting output voltage between 1.25V and 15V in 64 steps. The circuit can be adapted for a lot of applications.  Low-Cost 6-Bit DAC Circuit Diagram Circuit and working The circuit of the low-cost 6-bit DAC is shown in Fig. 1. The DAC is built around IC 7406, hex inverter (IC3). We may also use IC 7407 with six followers without changing the PCB. Steps are generated with the help of 6-bit digital input code D0 (LSB) through D5 (MSB) at CON2. Consequently, 64 combinations are possible starting from 000000 to 111111. At each combination, you will have a pre-de...

5. Do & Don’ts a) Don’t replace slightly pitted contacts; contacts should be replaced only when 40% of silver tips is remaining. b) Don’t file the contacts, don’t use emery paper on contacts it will reduce the life of contacts drastically c) Don’t apply grease on contacts d) Easily separable contacts can be reused according to IEC947 e) Do inspect the contact condition after short circuit & overload trip. f) Don’t used broken/cracked & carbonized arc chamber it will cause flashover g) Don’t replace the contacts after mechanical life of contactor is over. (You can replace the contacts 7 times after that complete contactor has to be replaced

This is an audio amplifier circuit based on IC, and IC were used that MPC563 with minimal output 6W, with impedance of 4 Ohm. Supply Voltage Minimum 4 Volt DC and a maximum voltage to 20 Volts DC. See him under this Scheme. 6 Watt 4 Ohm Amplifier Circuit

This inverter circuit can provide up to 800mA of 12V power from a 6V supply. For example, you could run 12V car accessories in a 6V (British?) car. The circuit is simple, about 75% efficient and quite useful. By changing just a few components, you can also modify it for different voltages. 6 V to 12 V Power Supply Inverter Circuit Diagram Part List: R1, R4 2.2K 1/4W Resistor R2, R3 4.7K 1/4W Resistor R5 1K 1/4W Resistor R6 1.5K 1/4W Resistor R7 33K 1/4W Resistor R8 10K 1/4W Resistor C1,C2 0.1uF Ceramic Disc Capacitor C3 470uF 25V Electrolytic Capcitor D1 1N914 Diode D2 1N4004 Diode D3 12V 400mW Zener Diode Q1, Q2, Q4 BC547 NPN Transistor Q3 BD679 NPN Transistor L1 See Notes MISC Heatsink For Q3, Binding Posts (For Input/Output), Wire, Board

Hi Friends Here i want to share a new post related to PLC and Visual Basic VB6.0 Communication VB code is given below. Enjoy   “Real Time Automated Control using PLC-VB Communication” Abstract This paper is to enable the Delta PLC (Programmable Logic Control) DVP14SS to communicate with the Visual Basic 6.0 . The communication between DVP14SS and Visual Basic 6.0 is via Modbus Serial Protocol. Computers are used as a link between humans and PLC systems as they have more graphics and visual capabilities. These are nothing but SCADA systems widely used for determining plant set-ups and displaying plant status on high quality screens. They also record/log the system data for long period .The SCADA software’s are the software packages needs to be purchased from vendors and the cost depends on tag count. Visual Basic 6.0 platform can be used develop the SCADA application effectively. Using VB 6.0 we integrate software and hardware across spectrum of vendors easily. Here we show simp...