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“ELECTRONIC CIRCUITS”的内容更新

累计：18 篇（自 2009-10-11 起）

更新：约8篇/年，最后更新855 天前

ELECTRONIC CIRCUITS

Ballast for energy-saving lamps

this compact ballast is intended for driving a 20-watt ‘bare’ compact fluorescent lamps (cfl) tube or bulb, that is, one without a driver circuit built into its socket that makes it ready to screw into an existing lamp socket. pin-base cfls are designed to be used with a separate ballast. as with a linear fluorescent system, the lamp and ballast must b... (302 天前)

http://inezha.com/w/ir8g659

ELECTRONIC CIRCUITS

Radio Wave Alarm 4093 CMOS IC

this very simple alarm circuit is sure to have the police beating a path to your door - however, it has the added advantage of alerting you to their presence even before their footsteps fall on the doormat.the alarm circuit transmits on mw (medium wave) (this is the small problem with the police). ic1a, together with a sensor (try a 20cm x 20cm sheet ... (302 天前)

http://inezha.com/w/vihil5u

ELECTRONIC CIRCUITS

Oxygen Sensor Simulator

this oxygen sensor simulator is built from a 555 and few other common parts. just when i thought i'd seen all the uses for the 555. the oxygen sensor on a cars exhaust is used to determine how efficiently the fuel mixture is to an engine.the oxygen sensor simulator as built on a protoboard. note the cigarette lighter plug used for power source. the adjus... (302 天前)

http://inezha.com/w/mazpu5a

ELECTRONIC CIRCUITS

Car Parking Sensor

this circuit was designed as an aid in parking the car near the garage wall when backing up. led d7 illuminates when bumper-wall distance is about 20 cm., d7+d6 illuminate at about 10 cm. and d7+d6+d5 at about 6 cm. in this manner you are alerted when approaching too close to the wall.all distances mentioned before can vary, depending on infra-red tran... (302 天前)

http://inezha.com/w/7s8wrxq

ELECTRONIC CIRCUITS

20 Watt Automotive Power Amplifier - LM2005

the high current capability of the lm2005 allows it to continuously endure either ac or dc short circuit of the output with a maximum supply voltage of 16v. this will protect the loudspeaker in a bridge mode, when a dc short of the output occurs on one side of the speaker.the device will prevent the speaker from destruction by reducing the dc across th... (302 天前)

http://inezha.com/w/s1hx2xl

ELECTRONIC CIRCUITS

Water Level Indicator

this electronic circuit is a water level indicator. it is simple and practical measure and know the level of reservoir. the component ic cmos 4066 used as switcher on any level detector/sensor that connect the negative polarity pin of each led to ground. buzzer will be sounded if full level sensor achieved. it's a cool electronic circuit.features:po... (302 天前)

http://inezha.com/w/wezubx8

ELECTRONIC CIRCUITS

AC Ohmmeter - ESR Meter

the esr meter is basically an ac ohmmeter with special scales and protective circuitry. it provides a continuous reading of series resistance in electrolytic capacitors. it operates at 100 khz to keep the capacitive reactance factor near zero. the remaining series resistance is due to the electrolyte between the capacitor plates and indicates the state o... (302 天前)

http://inezha.com/w/lh8njxe

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