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  • Hi-Fi Preamplifier circuit

    Notes: This circuit was submitted by Graham Maynard from Newtownabbey, Northern Ireland. It has an exceptionally fast high frequency response, as demonstrated by applying an 100kHz squarewave to the input. All graphs were produced using Tina Pro. Th

    Posted at 08-11-30 by Admin views(3911)

  • Audio Notch Filter For audio frequencies 100Hz - 10KHz

    Description: A variable notch filter with both high and low pass filters. Notes At first glance this circuit looks fairly complex, but when broken down,can be divided into high pass and low pass filter sections followed by a summing amplifier with

    Posted at 08-11-30 by Admin views(6255)

  • Headphone Amplifier circuit

    Description: An amplifier to drive low to medium impedance headphones built using discrete components. Notes: Both halves of the circuit are identical. Both inputs have a dc path to ground via the input 47k control which should be a dual log type p

    Posted at 08-11-30 by Admin views(3704)

  • 150W MP3 Car Power Amplifier

    Block Diagram: Here, it is a diagramm of an active loudspeaker. The LF353 of, National Semiconductor, is going to split audio signal into three bands. SANYO'S LA47536 is going to amplify these signals. In stereo mode, we shall have the action of eigh

    Posted at 08-11-30 by Admin views(7101)

  • Amp with Tone Controls and Soft Switching

    Description: Built around an LM380, this amplifier includes tone controls and electronic soft switching. The soft switching circuitry ensures power is built up gradually eliminating the dc thump. Notes: The soft switching is enabled by a BD131 trans

    Posted at 08-11-30 by Admin views(4373)

  • Cheap 100 to 150 Watt Amp

    Here is a simple and cheap amp to make I could have made the circuit board smaller but what the heck Here is a suggested circuit for the power supply. Please note: I have been getting some e-mail's from people with problems to discover that there

    Posted at 08-11-30 by Admin views(4429)

  • ECM Mic Preamplifier high quality preamp for electret mic inserts

    Description: A microphone amplifier that may be used with either Electret Condenser Microphone (ECM) inserts or dynamic inserts, made with discrete components. Notes: Both transistors should be low noise types. In the original circuit, I used BC650

    Posted at 08-11-30 by Admin views(19210)

  • DVB-C video is transmitted in SPI interface and ASI interface

    There is video of two kinds of MPEG2 in the transmission interface of current DVB-C system equipment code shedding transmits interface standard: Asynchronous is serial interface ASI and SPI of synchronous and collateral interface. SPI altogether has

    Posted at 08-08-11 by Admin views(2848)

  • Tone Control Circuit classic Baxendall BC109C

    Description: Based on the classic Baxendall tone control circuit, this provides a maximum cut and boost of around 10dB at 10K and 50Hz. Notes: The first BC109C transistor (left hand side) is acting as a buffer. It provides the circuit with a high i

    Posted at 08-11-30 by Admin views(5145)

  • Passive telephone monitor with MEC002M

    After installation adjust the frequency , the frequency falls to the point where you want to recommend not to use confidential section of 88-108MHz frequency. Then a soft- line distance of 20-30 meters is no problem , the original did not affect the

    Posted at 11-03-25 by Sky views(1648)

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