tag:blogger.com,1999:blog-4609238170931947864Thu, 05 Sep 2024 20:05:31 +0000AudioAmplifierTransmitterPower supplyFM TransmitterInverterLED CircuitsBattery ChargerSTKRFTV TransmitterPIC ProgrammerAudio power AmplifierHamDC ConvertersRegulated Power SupplyRelayon-off switch555Active AntennaDelayLead Acid Battery ChargerVariable DC Power SupplyAM TransmitterDTMFDimmerElectronic ThermostatRF AmplifierTime DelayTone ControlUltrasoniclight and LEDremote controllertimer100W Audio Amplifier50 Watt Power AmplifierAudio level MeterBass-TrebleChristmasHeat Sensitive SwitchInfra Red SwitchMosFet Audio AmplifierPreAmplifierReceiverSubwhooferSurround SoundTV ModulatorTelephoneaudio level indicator circuit120 VAC Inverter60 Watt Power AmplifierAlertAntennaAtmel ProgrammerAudio circuitsAudio mixerBalanced Line ConverterChristmas StarDual Power SupplyFixed Power SupplyGuitar AmplifierHigh current SupplyInfra RedInfra Red AudioInfra Red Night VisionLamp FaderLoudspeaker protectionMicrocontrollerModular Audio PreamplifierMuscular Bio StimulatorNi-Cad Battery ChargerOver / Under voltage cut-offProximity DetectorStrobe LightUPSVHF TransmitterVoltage InverterVolume Controllercw Transmitter12 Volt 30 Amp PSU13.8V/10A power supply13.8V/20A power supply13.8V/40A power supply150W Audio Amplifier15W Audio Amplifier17W Audio Amplifier18W audio amplifier200W Audio Amplifier25 Watt Audio Amplifier2n3055 Amplifier3-30/2.5A Stabilized power supply30 Meter Receiver Project40 m Band Direct Conversion Receiver500W (220V) Inverter5v power supply circuit5v/1A power supply6V to 12V converter9V 2A power supplyAC Current MonitorAlarmAllpass network shifts signals 90°Amplifier TimerAmplifier of acoustic frequenciesAutomotive 12V to +-20V converterBFOBass AmplifierBatteryBattery-Tester (1.5-15V)Burglar AlarmBuzzer CircuitsCB TransmittorClass-A Audio AmplifierCode LockCommunicationDC12V to DC50V converterDC13.8V to DC250VDoor Bell circuitsFM 30W TransmitterFM PLL TransmitterFM Stereo EncoderFM StereoTransmitterFrequency GeneratorsFull-duplex IntercomGyrator CircuitH-BridgeHeadphone AmplifierHi-FiIR Remote-Control CheckerIgnition CircuitIncreasing Regulator CurrentL200 PSULA4440LCD DisplayLED TimerLaserLaser TransmissionLight/dark activated relayLong Loopstick AntennaMAX 2606Mains LEDMini-box 2W AmplifierMorse CodeMotorola Hi-Fi power amplifierMusic CircuitsOp-Amp radioOver voltage Protection for LM317PSU with Overvoltage ProtectionParallel Port Relay InterfaceParrot Sounding buzzer circuitsPassive Aircraft ReceiverPrescalerProgrammable LED FlashersProgrammerQROQuadraphonic AmplifierRadioSecuritySelf Switching PSUSleeping-AidSolar PanelsTTL Power SupplyTV AmplifierTV Signal AmplifierToysTransmitter power AmplifierUnbalancedUniversal PSU -L200Video Signal AmplifierWhistle Responderelectronic mosquito repeller cd4047low pass filtermosquito repellersoft start PSUsound Operated SwitchstarElectronic Circuits, Hobby Circuits, Audio-video circuits, Radio circuits, Power supply, Digital Circuits, Embedded Circuits, Amplifiers 無料の電子回路、ホビー回路、オーディオ-ビデオ回路、無線回路、電源、デジタル回路、組み込み回路、アンプhttp://electronics4everyone.blogspot.com/noreply@blogger.com (renlabs)Blogger323125en-usnoElectronic Circuits, Hobby Circuits, Audio-video circuits, Radio circuits, Power supply, Digital Circuits, Embedded Circuits, Amplifiers 無料の電子回路、ホビー回路、オーディオ-ビデオ回路、無線回路、電源、デジタル回路、組み込み回路、アンプElectronic Circuits, Hobby Circuits, Audio-video circuits, Radio circuits, Power supply, Digital Circuits, Embedded Circuits, Amplifiers 無料の電子回路、ホビー回路、オーディオ-ビデオ回路、無線回路、電源、デジタル回路、組み込み回路、アンプnoreply@blogger.comtag:blogger.com,1999:blog-4609238170931947864.post-937516184409763359Mon, 30 Jan 2012 16:01:00 +00002012-01-30T08:02:13.672-08:00Subscribe to Electronics Circuits by Emailhttp://electronics4everyone.blogspot.com/2012/01/t2012.htmlnoreply@blogger.com (renlabs)0tag:blogger.com,1999:blog-4609238170931947864.post-8377455785295049571Tue, 01 Feb 2011 02:24:00 +00002011-01-31T18:25:28.242-08:00Subscribe to Electronics Circuits by Emailhttp://electronics4everyone.blogspot.com/2011/01/t2.htmlnoreply@blogger.com (renlabs)0tag:blogger.com,1999:blog-4609238170931947864.post-4883404657332437405Thu, 28 Oct 2010 20:04:00 +00002010-10-28T13:04:27.424-07:00Subscribe to Electronics Circuits by Emailhttp://electronics4everyone.blogspot.com/2010/10/te.htmlnoreply@blogger.com (renlabs)0tag:blogger.com,1999:blog-4609238170931947864.post-330112448191332959Fri, 24 Sep 2010 02:39:00 +00002010-10-05T10:34:28.184-07:00AmplifierAudioAudio circuitsSubscribe to Electronics Circuits by EmailThis is just another 20W audio amplifier circuit , but this time based on the LM1875 audio amplifier IC from National Semiconductors. With a 25V dual power supply LM1875 can deliver 20W of audio power into a 4 ohm speaker. The LM1875 requires very less external components and has very low distortion. The IC is also packed with a lot good features like http://electronics4everyone.blogspot.com/2010/09/subscribe-to-electronics-circuits-by.htmlnoreply@blogger.com (renlabs)1tag:blogger.com,1999:blog-4609238170931947864.post-4081203483499451932Thu, 01 Jul 2010 06:20:00 +00002010-07-01T02:36:00.411-07:00Solar PanelsSubscribe to Electronics Circuits by EmailI hope to cover this article with the following. Don’t know I have succeed in this.What are solar panels?How do solar panels work?How to make panels?Solar Panels use arrays of solar photovoltaic cells to convert incoming photons from sun into usable electricity. With solar panels we are using echo friendly renewable energy from the sun.Solar panels are http://electronics4everyone.blogspot.com/2010/06/all-about-solar-panels.htmlnoreply@blogger.com (renlabs)1tag:blogger.com,1999:blog-4609238170931947864.post-6510772265000650266Tue, 01 Jun 2010 04:03:00 +00002010-07-01T02:38:11.877-07:00BatteryLead Acid Battery ChargerHistory of Lead Acid BatteryThe lead-acid storage battery, an important energy storage device, is the most widely used secondary storage cell by automobile and other industries. Storage cells are devices which release a flow of electron through an external circuit as a result of reactions occurring between the active electrode materials and ions transported by the electrolyte. The cells in which http://electronics4everyone.blogspot.com/2010/05/lead-acid-storage-battery.htmlnoreply@blogger.com (renlabs)1tag:blogger.com,1999:blog-4609238170931947864.post-6820212094446907704Wed, 31 Mar 2010 04:44:00 +00002010-07-01T02:39:34.990-07:00Atmel ProgrammerMicrocontrollerIntroduction This ISP Programmer can be used either for in-system programming or as a stand-alone spi programmer for Atmel ISP programmable devices. The programming interface is compatible to STK200 ISP programmer hardware so the users of STK200 can also use the software which can program both the 8051 and AVR series devices. HardwareFigure 1 shows the circuit http://electronics4everyone.blogspot.com/2010/03/isp-flash-microcontroller-programmer.htmlnoreply@blogger.com (renlabs)0tag:blogger.com,1999:blog-4609238170931947864.post-2171788554306685820Mon, 11 Jan 2010 09:15:00 +00002010-07-01T02:40:20.925-07:00FM TransmitterMAX 2606TransmitterSubscribe to Electronics Circuits by EmailHere’s a single chip FM transmitter circuit using Maxim semiconductors IC MAX2606. The MAX2606 is a compact, high-performance intermediate frequency VCO specially designed for wireless communication circuits. They have monolithic construction with low-noise and a low-power operation in a compact 6-pin SOT23 packing .Th1s low-noise IC feature an on-chip http://electronics4everyone.blogspot.com/2010/01/single-chipmax-2606-based-fm.htmlnoreply@blogger.com (renlabs)0tag:blogger.com,1999:blog-4609238170931947864.post-7560776599605323955Thu, 31 Dec 2009 08:58:00 +00002010-03-30T21:17:34.649-07:00DTMFremote controllerRFTelephoneHere is a circuit of a remote control unit which makes use of the radio frequency signals to control various electrical appliances. This remote control unit has 4 channels which can be easily extended to 12. This circuit differs from similar circuits in view of its simplicity and a totally different concept of generating the control signals. Usually remote control circuits make use of infrared http://electronics4everyone.blogspot.com/2009/12/radio-remote-control-using-dtmf.htmlnoreply@blogger.com (renlabs)0tag:blogger.com,1999:blog-4609238170931947864.post-4817045890496161717Tue, 01 Dec 2009 03:41:00 +00002009-11-30T19:45:21.676-08:00ChristmasChristmas Starlight and LEDSubscribe to Electronics Circuits by EmailHere is a low-cost circuit of Christmas star that can be easily constructed even by a novice. The main advantage of this circuit is that it doesn’t require any step-down transformer or ICs. Components like resistors R1 and R2.capacitors C1, C2, and C3, diodes D1 and D2, and zener ZD1 are used to develop a fairly steady 5V DC supply voltage that provides http://electronics4everyone.blogspot.com/2009/11/mains-operate-christmas-star.htmlnoreply@blogger.com (renlabs)0tag:blogger.com,1999:blog-4609238170931947864.post-8337093327964991393Mon, 30 Nov 2009 12:10:00 +00002009-11-30T19:46:05.475-08:00ChristmasChristmas Starlight and LEDSubscribe to Electronics Circuits by EmailUsing light effects for decoration on festive occasions is a normal practice. Designers are coming up with varieties of electronic circuits to fill the imagination of users. Here is an easy-to-assemble circuit for christmas decoration as shown in Fig.1. It comprises four transistors, eighteen LEDs, a few resistors and two capacitors. Transistors T1 and http://electronics4everyone.blogspot.com/2009/11/led-lighting-for-christmas.htmlnoreply@blogger.com (renlabs)0tag:blogger.com,1999:blog-4609238170931947864.post-2015345722067524648Wed, 28 Oct 2009 11:13:00 +00002009-10-28T04:16:49.212-07:00FM TransmitterTransmitterSubscribe to Electronics Circuits by EmailThis circuit is a circuit diagram fm transmitter. This circuit is somewhat different from the previous fm transmitter circuit. Transmitter circuit described here has the additional RF power amplifier stage, after the oscillator stage, to increase the power output of 200-250 milliwatts. With a good matching 50-ohm ground plane antenna or multi-element yagihttp://electronics4everyone.blogspot.com/2009/10/long-range-fm-transmitter-circuit.htmlnoreply@blogger.com (renlabs)0tag:blogger.com,1999:blog-4609238170931947864.post-7480110858045118957Wed, 28 Oct 2009 11:01:00 +00002009-10-28T04:07:34.310-07:00InverterPower supplySubscribe to Electronics Circuits by Email This DC to AC inverter circuit work based on unstable multi vibrator does. In this circuit, IC CD4047 is chosen as a heart of unstable multi vibrator, because this IC type gives a complementary output that has opposite phase to another ( pin 10 and 11 as seen in Figure 1), and has 50 % duty cycle that satisfy to generate a pulse for http://electronics4everyone.blogspot.com/2009/10/simple-dc-to-ac-inverter.htmlnoreply@blogger.com (renlabs)0tag:blogger.com,1999:blog-4609238170931947864.post-4194838748841896174Fri, 23 Oct 2009 11:46:00 +00002009-10-23T04:55:53.022-07:00Audio circuitsBuzzer CircuitsDoor Bell circuitsMusic CircuitsParrot Sounding buzzer circuitsHere is a mains-operated doorbell that produces parrot-likesweet voice without requiring any musical IC. The circuit is cheap and easy to construct. The AC mains is fed to the circuit without using any step-down transformer.The complete circuit is shown in Fig. 1. The main components of the circuit are a resistor-capacitor network, transistor BC337 and audio output transformer X1. The oscillationhttp://electronics4everyone.blogspot.com/2009/10/parrot-sounding-ac-door-bell.htmlnoreply@blogger.com (renlabs)0tag:blogger.com,1999:blog-4609238170931947864.post-3350051494127558054Wed, 30 Sep 2009 05:40:00 +00002009-09-29T22:58:20.935-07:00AudioAudio power AmplifierSubscribe to Electronics Circuits by EmailThe Circuit present here is a 20Watts Car Stereo Amplifier. The main features of this powerful MULTIWATT® package (a trademark of SGS-THOMSON Microelectronics), a power amplifier IC chips designed specifically for car radio application, are the high current capability (3.5A) and the capability to drive a very low impedance (down to 1.6R). Here is the http://electronics4everyone.blogspot.com/2009/09/20-watts-rms-amplifier-using-tda2004.htmlnoreply@blogger.com (renlabs)0tag:blogger.com,1999:blog-4609238170931947864.post-2967426024743847142Thu, 17 Sep 2009 03:40:00 +00002009-09-16T20:45:56.359-07:00Strobe LightStrobe lights are widely used by disco lovers to create wonderful visual effects in disco halls and auditoriam. The circuit of a battery operated portable miniature strobe light, which can be constructed using readily available inexpensive components, is described here. For convenience and simplicity, an ordinary neon lamp is used here in place of the conventional Xenon tube. The whole gadget canhttp://electronics4everyone.blogspot.com/2009/09/strobe-light.htmlnoreply@blogger.com (renlabs)0tag:blogger.com,1999:blog-4609238170931947864.post-962803378226300505Mon, 31 Aug 2009 09:18:00 +00002009-08-31T02:37:44.332-07:00DC ConvertersPower supplyThe selected switching topology is called a "push-pull" converter, because the transformer has a double primary (or a "centre-tapped" one, if your prefer). The centre tap is permanently connected to the car battery (via an LC filter to avoid creating peaks in the battery lines, which could affect other electronic equipment in the car). The two ends of the primary are connected to a pair of http://electronics4everyone.blogspot.com/2009/08/sg3525-dc-converter-12v-to-35v-35v.htmlnoreply@blogger.com (renlabs)0tag:blogger.com,1999:blog-4609238170931947864.post-7162698627493869474Thu, 30 Jul 2009 09:02:00 +00002009-07-30T02:07:10.362-07:00AmplifierAudioSurround SoundIt is fun to make a variable space in your small room, but it’s hard to make the actuator to move your wall or room partition. Using analog audio line delay, you can adjust your room virtually. Just turn a knob in your audio set and you can adjust your room size. The circuit described here will make your dream come true, giving a feel that your speaker is located 15 meters behind you, even thoughhttp://electronics4everyone.blogspot.com/2009/07/analog-audio-delay-line3d-sound.htmlnoreply@blogger.com (renlabs)0tag:blogger.com,1999:blog-4609238170931947864.post-8208452528287847328Fri, 03 Jul 2009 05:24:00 +00002009-07-02T22:26:03.960-07:00Heat Sensitive Switchon-off switchUsing a thermistor in the position shown makes a heat activated sensor. A change in temperature will alter the output of the op amp and energize the relay and light the LED. Swapping the position of the thermistor and 47k resistor makes a cold or frost alarm.http://electronics4everyone.blogspot.com/2009/07/temperature-monitor.htmlnoreply@blogger.com (renlabs)0tag:blogger.com,1999:blog-4609238170931947864.post-907843771310898010Fri, 03 Jul 2009 05:22:00 +00002009-07-02T22:24:00.682-07:00on-off switchsound Operated SwitchThis sensitive sound operated switch can be used with a dynamic microphone insert as above, or be used with an electric (ECM) microphone. If an ECM is used then R1 (shown dotted) will need to be included. A suitable value would be between 2.2k and 10kohms. The two BC109C transistors form an audio preamp, the gain of which is controlled by the 10k preset. The output is further amplified by a http://electronics4everyone.blogspot.com/2009/07/sound-operated-switch.htmlnoreply@blogger.com (renlabs)0tag:blogger.com,1999:blog-4609238170931947864.post-8837486460069968869Fri, 03 Jul 2009 05:19:00 +00002009-07-02T22:21:47.283-07:00on-off switchTime DelaytimerA switched timer for intervals of 5 to 30 minutes incremented in 5 minute steps. Simple to build, simple to make, nothing too complicated here. However you must use the CMOS type 555 timer designated the 7555, a normal 555 timer will not work here due to the resistor values. Also a low leakage type capacitor must be used for C1, and I would strongly suggest a Tantalum Bead type. Switch 3 adds an http://electronics4everyone.blogspot.com/2009/07/5-to-30-minute-timer.htmlnoreply@blogger.com (renlabs)0tag:blogger.com,1999:blog-4609238170931947864.post-268048199642611816Fri, 03 Jul 2009 05:13:00 +00002009-07-02T22:14:16.882-07:00AudioAudio mixerThe mixer circuit below has 3 line inputs and 3 mic inputs. The mic inputs are suitable for low impedance 200-1000R dynamic microphones. An ECM or condenser mic can also be used, but must have bias applied via a series resistor. As with any mixer circuit, a slight loss is always introduced. The final summing amplifier has a gain of 2 or 6dB to overcome this. The Input line level should be around http://electronics4everyone.blogspot.com/2009/07/6-input-mixer.htmlnoreply@blogger.com (renlabs)0tag:blogger.com,1999:blog-4609238170931947864.post-2805703977236275718Tue, 30 Jun 2009 12:18:00 +00002009-06-30T05:22:26.928-07:00TransmitterTV TransmitterVHF TransmitterHere's a simple video transmitter for VHF TV channel will accept baseband video input, hence it can be driven by most CCD cameras and VCR video outputs. It ouputs roughly 80mW and when used with a 40cm telescopic antenna over 100 metres range is possible.The transistor of the video transmitter can be a BC108, BC546, BC337 or a 2N2222. L1 is wound on a 10 mm air former. Use 6 turns 24 SWG for http://electronics4everyone.blogspot.com/2009/06/vhf-video-transmitter-60-200-mhz.htmlnoreply@blogger.com (renlabs)0tag:blogger.com,1999:blog-4609238170931947864.post-5043756897466041492Thu, 28 May 2009 08:42:00 +00002009-05-28T02:11:06.575-07:00AmplifierAudioAudio power AmplifierThis circuit is a 1 watt mono amplifier using the TDA 7052 from Philips. It is designed to be used as a building block in other projects where a battery powered audio amplifier is required to drive a small speaker. It will operate best from 6 – 12 V DC and requires no heatsink for normal use.Circuit Description :There are only 5 external components. C1 is the input coupling capacitor, which http://electronics4everyone.blogspot.com/2009/05/1w-mono-amplifier-with-ic-tda7052.htmlnoreply@blogger.com (renlabs)0tag:blogger.com,1999:blog-4609238170931947864.post-7940402130772351218Fri, 24 Apr 2009 10:10:00 +00002009-10-15T23:43:25.641-07:00electronic mosquito repeller cd4047mosquito repellerUltrasonicHere is the circuit diagram of an ultrasonic mosquito repeller.The circuit is based on the theory that insects like mosquito can be repelled by using sound frequencies in the ultrasonic (above 20KHz) range.The circuit is nothing but a PLL IC CMOS 4047 wired as an oscillator working at 22KHz.A complementary symmetry amplifier consisting of four transistor is used to amplify the sound.The piezo http://electronics4everyone.blogspot.com/2009/04/electronic-mosquito-repeller.htmlnoreply@blogger.com (renlabs)1