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Archives for August, 2011

Audio amplifier circuit board

Audio amplifier circuit board Audio amplifier circuit board using KA2221 Audio amplifier circuit board Samsung Audio amplifier circuit board DUAL LOW NOISE EQUALIZER AMPLIFIER The KA2221 is a monolithic integrated circuit consisting of 2-channel low noise amplifiers and regulated power supply for car stereos. FEATURES suitable for car stereos. Low noise amplifier. Voltage regulator included. […]

schematic dc-dc converter

schematic dc-dc converter schematic dc-dc converter 12v to 120v schematic dc-dc converter using MJE2955, 2sc945 schematic dc-dc converter schematic dc-dc converter

Frequency converter schematic

Frequency converter schematic Frequency converter schematic using TR Frequency converter schematic Frequency converter schematic

Full-duplex Intercom PCB for your office and house

P1____    22K  Log. Potentiometer R1___     22K  1/4W Resistor R2,R3____ 100K  1/4W Resistors R4___     47K  1/4W Resistor R5_____   2K2 1/4W Resistor (See Notes) R6_____   6K8 1/4W Resistor R7________22K  1/2W Carbon or Cermet Trimmer R8_______ 2K7 1/4W Resistor C1,C6_____100nF  63V Polyester or Ceramic Capacitors C2,C3___ _10µF  63V Electrolytic Capacitors C4________22µF  25V Electrolytic Capacitor C5________22nF  63V Polyester or […]

DC Power Supplies with Remote

DC Power Supplies with Remote DC Power Supplies with Remote circuit modules using MTP75N06, SG3525, BC549 Variable Programmable DC power supply 30v to 12v, some DC–DC converters include “Remote Sense” connection points

TDA7088T FM receiver circuit

TDA7088T FM receiver circuit for battery supply Equipped with all stages of a mono receiver from antenna to audio output, Mute circuit, Search tuning with a single varicap diode. Mechanical tuning with integrating AFC, AM application supported,  Power supply polarity protection,  Power supply voltage down to 1.8 V.  Mechanical tuning, this is possible with or […]

LCR RIAA AND TUBES Phono Schematic

LCR RIAA AND TUBES Phono Schematic using EQ600

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