Showing posts with label 15. Show all posts
Showing posts with label 15. Show all posts
Thursday, October 23, 2014
6 to 15 Volt DC Converter
A very efficient 6V to 15V DC to DC converter using LM2585 is publicized at this time. LM2585 is a monolithic integrated voltage converter IC with the intention of can be situated used stylish various applications like flyback converters, boost converters, advance converters, multiple output converters and the rest. The circuit requires lowest possible amount of outdoor components and the IC can source up to 3A output current.
at this juncture the IC is wired for instance a boost converter somewhere resistors R1 and R2 are used to established the output voltage .The junction of R1 and R2 is connected to the comment pin of IC1. Capacitor C4 is the input filter while capacitor C1 the filter on behalf of output. set of contacts comprising of resistor R1 and capacitor C2 is intended for frequency compensation. Inductor L1 provisions the energy for acquiring boost conversion.
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| 6 to 15 Volt DC Converter |
Wednesday, October 15, 2014
4 X 15 Watt Mini Power Amplifier
A lot of electronic circuits in the domain of audio amplifiers are already been published here. This circuit is a little different because it is a four channel amplifier. Each channel of this amplifier can deliver an output of 15Watts into a 4 ohm speaker. The amplifier can be operated from a single 12V DC supply and this makes it possible to use this amplifier in car audio applications too.
Circuit diagram :
4 X 15 Watt Mini Power Amplifier
The circuit is based on the 15W BTL X 2 channel audio power amplifier IC TA8215 from Toshiba. Even though chip is specifically designed for car audio applications it can be also used for home audio applications. Two TA8215 ICs are used here in order to obtain a 4 channel amplifier system. The circuit is designed almost exactly as per the application diagram in the ICs datasheet. Pins 7 and 19 are the Vcc pins of the ICs internal integrated power amplifier stages and these pins are connected to the positive supply. Pin 9 is the Vcc pin for ICs internal preamplifier and it is also connected to the positive supply. Pins 13 and 14 are the internal power amplifiers ground pins and they are tied together and connected to the ground.
The internal preamplifier’s ground pin (pin5) is connected to the common ground through a 10 Ohm resistor which makes the input ground separated from the common ground by a resistance of 10 ohms and this improves the noise rejection. The 100uF capacitor works as a power supply de-coupler. The resistor networks connected to the output lines of each amplifier improves the high frequency stability. The variable resistors (R3, R4, R12 and R13) works as the volume controller for the corresponding channels.
Notes :
- Assembling the circuit on a good quality PCB is a must for obtaining optimum sound quality.
- Use 12V DC for powering the circuit.
- The ICs must be fitted with adequately sized heat sinks.
- R3, R4, R12 and R13 serves as volume controllers.
- K1 to K4 can be 4 Ohm, 20W speakers.
- This amplifier circuit can be used in a variety of applications such as car audio systems, home theater systems, personal audio systems, public address systems etc.
Thursday, September 4, 2014
15 Volt Stabilizer circuit
15V stabilizer schematic
Part List :
D1 - D4 use 3A diode
C1 - C2 use Capacitor Elco with capacity 4700uF - 10000uF 80V
C3 - C6 use Capacitor Elco with capacity 470uF - 2200uF 50V
Q1 2N3055
Q2 MJ2955
IC 7815 and 7915
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