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Doorphone Intercom Circuits using LA4100, LA4101, LA4102

Doorphone Intercom Circuits using LA4100, LA4101, LA4102 Doorphone Intercom Circuits using LA4100, LA4101, LA4102 R1 …….. 5K6 R2 …….. 3K R3 …….. 47 RX …….. 220(6V) 390 (9V) 560(12V) C1,3 …… 10nF C2 …….. 100nF C4,6 …… 47uF/10V C5 …….. 47pF/50pF C7 …….. 10uF/10V C8,9 …… 100UF/10V C10 ……. 220uF/10V D1 …….. 1N4001 D2 …….. […]

Amplifier Circuit

Amplifier Circuit using LA4505 Amplifier Circuit using LA4505

Modified Electronics circuit power supplay

Further adjustments include a rectified and filtered heater supply to the triodes eliminating AC hum coupled to the signal path via parasitic wiring capacitances. A power transformer with a 350V-0-350V secondary supply an increased voltage supply to the output section with is then stepped down to the 5F6-A’s voltage supplies to the phase splitter, cathode […]

InPowered battery charger circuit

InPowered battery charger circuit diagram schematic 6V-12V using NE555, LM7812, 2SA671, 1N4002, BC549 auto battery charger circuit On a lithium-ion cell, 3.8V/cell indicates a state-of-charge of about 50%. It must be noted that utilizing voltage as a fuel gauge function is inaccurate because cells made by different manufacturers produce a slightly different voltage profile. This […]

60W Audio Amplifier Circuit STK4392

60W Audio Amplifier Circuit STK4392 Class G/H headphone amplifiers. No compromise to power/performance on Sanyo Amplifiers ISO 9001 certified, full warranty

Fire Alarm circuit diagram for home security

Fire Alarm circuit diagram for home security Equipment designed to detect changes associated with fire, monitor the integrity of their operations and provide automatic control, the transmission of information necessary to prepare the facility for fire, temperature, light based on a predetermined sequence. The panel also supply electrical energy to operate the associated sensors, controls, […]

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