http://www.electrokits.com/ Electronic Circuits and Kits by ElectroKits en-us Email@ElectroKits.com http://www.electrokits.com/Motors/10Amp-3055-Adjustable-Motor-Control Control RC motor speeds with this 10 amp adjustable motor controller circuit. Uses a total of 5 2N3055 high power transistors. Wed, 19 Mar 2008 11:19:23 -0500 http://www.electrokits.com/Motors/Mini-Low-Rate-Motor-Speed-Control A small motor control electronic circuit schematic. Control the speed of your motors with this low rate speed control electronic circuit. Wed, 19 Mar 2008 09:21:50 -0500 http://www.electrokits.com/Security/Fire-Alarm-Smoke-Detector This smoke detector acts as a fire alarm by setting off an alarm when smoke is detected. It uses a very simple bulb and LDR approach. Thu, 13 Mar 2008 11:24:29 -0500 http://www.electrokits.com/Electric-RC-Cars/Tiny-RC-Car-Transmitters Build super cheap and small RC car transmitters that operate on 27 and 49 MHz. Meant for small remote control (RC) cars. Very easy to build, and cheap. Plus battery charger. Tue, 11 Mar 2008 14:00:41 -0500 http://www.electrokits.com/Datasheets/BC547-Datasheet The BC547 is a common NPN small signal transistor. View the datasheet and information for the BC-547 transistor from various manufacturers. Mon, 10 Mar 2008 11:46:07 -0500 http://www.electrokits.com/FM-Radio-Transmitters/3V-BA1404-FM-Transmitter Very small Hi-Fi Stereo FM Transmitter circuit that uses only 1 chip (BA-1404), and is very easy to construct. Operates from 1.5-3 Volts DC (just 1 or 2 AA batteries). Tue, 04 Mar 2008 07:18:38 -0500 http://www.electrokits.com/Ringers-Buzzers/Visual-Doorbell-Alert Ever missed the doorbell because you couldn't hear it? Well this visual doorbell circuit will allow you to see a flashing light instead! Mon, 03 Mar 2008 14:09:17 -0500 http://www.electrokits.com/Security/Motorcycle-Theft-Alarm Build a motorcycle alarm for your motorcycle. This electronic circuit sense when your motorbike is moved and sets of an alarm for 2 minutes. Cheap motorcycle alarm! Thu, 28 Feb 2008 15:36:43 -0500 http://www.electrokits.com/Security/Digital-Alarm-Keypad A digital keypad lock / opening circuit. Build your digital safe or alarm, which is operated by entering the right codes on a keypad. Thu, 28 Feb 2008 13:08:46 -0500 http://www.electrokits.com/LED-Circuits/Alternate-LED-Flashing An LED circuit that alternately flashes two LED's on and off. Perfect for a hazard or warning sign. When one LED is on the other is off. Thu, 28 Feb 2008 12:15:21 -0500 http://www.electrokits.com/Misc/Metal-Detector-Circuits Metal detectors a tons of fun. These metal detector electronic circuits will enable you to go hunting for all kinds of cool stuff, wherever you like! Wed, 20 Feb 2008 09:10:50 -0500 http://www.electrokits.com/Receivers/Aircraft-Receiver Aircraft radio receiver circuit that receives aircraft radio signals in the 220-400 MHz band. This kit is small and simple to build, and it's a lot of fun to listen to aircrafts! Wed, 20 Feb 2008 08:26:24 -0500 http://www.electrokits.com/Telephone/Cellphone-Battery-Charger A very clever portable cell phone battery charger that uses 8x1.5 AA cells (batteries) to charge cell-phone / mobile phone batteries while mobile. No more need for a mains outlet! Wed, 20 Feb 2008 07:59:10 -0500 http://www.electrokits.com/Electric-RC-Cars/RC-Car-Controller-Project This is a RC car project is the transmitter and receiver modules for a Remote Control car, with speed control and continuous steering. Tue, 19 Feb 2008 19:32:37 -0500 http://www.electrokits.com/Audio-Amplifiers/MOSFET-25W-Audio-Amp This audio amplifier electronic circuit uses MOSFET transistors to create more than 25 Watts output power. Uses IRF530 and IRF9530 MOSFET transistors. Tue, 19 Feb 2008 13:47:06 -0500 http://www.electrokits.com/Computers/Null-Modem-Circuit Shows the pins and wiring instructions for creating an RS-232 Null Modem for your PC. Tue, 19 Feb 2008 07:36:10 -0500 http://www.electrokits.com/Computers/MS-6541-Motherboard MS-6541 Motherboard information, drivers and links. Find the information you need about MS-6541 computer motherboards. Sun, 17 Feb 2008 11:00:31 -0500 http://www.electrokits.com/Audio-Amplifiers/Electret-Microphone-Amplifier Amplifier circuit for electret microphones (condenser microphones). Amplifier the audio signals picked up by the electret microphone, using 741 op-amp and a 2N2222 transistor. Thu, 14 Feb 2008 18:21:33 -0500 http://www.electrokits.com/Receivers/AM-Radio-Antenna Circuit diagram for an AM radio antenna preamplifier that amplifiers the signal before it get to the AM receiver, thus making the AM radio signals stronger for better reception. Wed, 13 Feb 2008 10:21:38 -0500 http://www.electrokits.com/Ringers-Buzzers/Ding-Dong-DoorBell Simple schematic for a doorbell electronic circuit that produces a ding-dong sound when your visitors presses the door-bell button. Based on IC 8021-2. Thu, 07 Feb 2008 07:58:27 -0500 http://www.electrokits.com/Sound-Activated/Ultrasonic-Whistle-Circuit Alternative ultrasonic-whistle electronic circuit diagram schematic. Emits high pitch frequency in the 11-22 kHz range, which can be heard by dogs and other small insects. Mon, 04 Feb 2008 09:28:37 -0500 http://www.electrokits.com/Sound-Activated/Vibration-Seismic-Sensor An electronic circuit that uses a regular 2-inch speaker to detect for low frequency vibrations in the ground (such as those cause by a deer or human walking), and sounds an alarm. Mon, 04 Feb 2008 08:56:05 -0500 http://www.electrokits.com/LED-Circuits/LTC3201-White-LED-Driver Circuit diagram for an ultra low-noise driver/supply circuit for white LEDs, using the IC LTC3201. Ensures a stable brightness in white LED driven items. Wed, 30 Jan 2008 09:27:44 -0500 http://www.electrokits.com/Sound-Effects/Transistor-Organ Schematic / circuit diagram for a tunable transistor electronic organ. Easy to tune the notes that are generated. Wed, 30 Jan 2008 09:12:29 -0500 http://www.electrokits.com/Transmitters/AM-Transmitter-Hams AM Transmitter circuit diagram, designed for transmission of AM (Amplitude Modulation) DSB (Double Side Band) radio signals. Ideal for HAM's Tue, 29 Jan 2008 10:14:40 -0500 http://www.electrokits.com/Fun-Games/Hangman Electronic circuit schematic that works as a Hangman LED game. Fun game to play with a friend, and very educational and entertaining circuit to build. Tue, 22 Jan 2008 11:19:17 -0500 http://www.electrokits.com/Fun-Games/Roulette-Wheel Schematic for an electronic circuit that behaves as an electronic version of a Roulette wheel. Flashed 10 LEDs in sequence with slowing pace until only 1 remains illuminated. Tue, 22 Jan 2008 10:46:47 -0500 http://www.electrokits.com/Telephone/Mobile-Phone-Call-Detector A simple circuit that flashes an LED when a cell phone has an incoming call. Uses a coil to pick-up the signal emitted during an incoming call event. Cell phone call detector. Tue, 22 Jan 2008 10:16:19 -0500 http://www.electrokits.com/RF-Amplifiers/40W-FM-Amp Circuit diagram and construction notes for a very nice 40 Watt FM Amplifier, with wide-band operational characteristics. Includes low pass filter design. Very good notes. Mon, 21 Jan 2008 17:06:02 -0500 http://www.electrokits.com/Audio-Amplifiers/Earphones-Amplifier This high gain earphones amplifier electronic circuit has a microphone, the sound from which it amplifies by a very high level so you can listen things to with lower volume easily. Sun, 20 Jan 2008 16:33:00 -0500 http://www.electrokits.com/FM-Radio-Transmitters/5Watt-PLL-Transmitter Interesting, hand-drawn schematic for a PLL FM Stereo Transmitter, with approximately 5 Watts RF output power. Thu, 17 Jan 2008 15:26:41 -0500 http://www.electrokits.com/Testing/Geiger-Counter-Circuit Complete instructions and circuit diagram for a Geiger counter meter device, which will allow you to measure radiation levels. Thu, 17 Jan 2008 10:37:56 -0500 http://www.electrokits.com/Receivers/SUPRX-FM-Receiver Schematic, circuit design and comprehensive details about a SUPRX FM radio receiver, featuring high sensitivity and very low noise and distortion. [PDF] Wed, 16 Jan 2008 08:45:39 -0500 http://www.electrokits.com/DC-Power-Supplies/0.7-24V-Power-Supply Variable-voltage DC power supply circuit. The output DC voltage is adjustable from 0.7-24V, with current limiting range from 50mA up to 2 Amps. Main transistor is the 2N3055. Tue, 15 Jan 2008 15:25:03 -0500 http://www.electrokits.com/Misc/Lightning-Detectors Schematics for electronic circuits that detect lightning in the sky by sensing signals at approximately 300kHz. Circuit theory of operation is discussed at length. Easy to build! Tue, 15 Jan 2008 12:44:55 -0500 http://www.electrokits.com/FM-Radio-Transmitters/Veronica-1W-PLL-FM The Veronica 1 Watt PLL FM Transmitter is a pretty decent broadcast PLL exciter or transmitter that can be used alone or with an RF power amplifier for high power radio broadcast. Tue, 15 Jan 2008 11:04:41 -0500 http://www.electrokits.com/Lights/Flashing-Car-Headlights Flash you car's headlights on/off, either together or alternatively, with this flashing lights electronic circuits. Don't know if it's legal but it's pretty cool :) Fri, 11 Jan 2008 12:59:37 -0500 http://www.electrokits.com/Sound-Effects/2-Tone-Train-Horn An electronic circuit that uses a 556 (Dual timer) IC to produce a two-tone train horn sound effect. Equivalent circuit using two 555 timers (single timers) is given. Fri, 11 Jan 2008 09:52:37 -0500 http://www.electrokits.com/Fun-Games/Game-Show-Circuits Circuits that operate just like the real gameshows, where a light shows up for the first contestant to hit their answer button. Thu, 10 Jan 2008 09:55:36 -0500 http://www.electrokits.com/Sound-Activated/Clap-Switch-Clapper This super cool circuit behaves as a clapper-switch. You clap and the circuit turns on. Clap and it turns off. Great as a light clap switch. Thu, 10 Jan 2008 09:42:02 -0500 http://www.electrokits.com/Telephone/Telephone-Ringing-Alert Electronic circuit that connects to phone line and produces and flashing LED and audible sound when there is an incoming call. Thu, 10 Jan 2008 09:16:02 -0500 http://www.electrokits.com/LED-Circuits/LED-Audio-VU-Meter Schematic for an electronic audio level VU meter that uses LED's to display the volume/audio levels. Wed, 09 Jan 2008 14:22:28 -0500 http://www.electrokits.com/DC-Power-Supplies/LM317-Variable-DC-Supply An extremely simple and cheap DC power supply with variable voltage (1.2-25 Volts) control. The circuit uses an LM317 integrated voltage regulator Ic. Wed, 09 Jan 2008 12:49:52 -0500 http://www.electrokits.com/DC-Power-Supplies/Variable-1-30-VDC-5Amp A very simple variable power supply with a DC output voltage adjustable from 1-3- Volts, with a maximum DC current of 5 Amps. Uses LM338 DC voltage regulator IC. Wed, 09 Jan 2008 10:49:04 -0500 http://www.electrokits.com/Fun-Games/TV-Bingo-Game A very curious TV Bingo game electronic circuit that will display the Bingo draw numbers on your TV. Tue, 08 Jan 2008 08:31:46 -0500 http://www.electrokits.com/Fun-Games/Simple-Lie-Detector-Circuit This is an extremely simple lie detector electronic circuit that can help tell if somebody is lying to you (oh how we hate liars!). Tue, 08 Jan 2008 08:09:29 -0500 http://www.electrokits.com/FM-Radio-Transmitters/500mW-FM-Transmitter Simple 4-transistor transmitter electronic circuit that produces a Frequency Modulated (FM) signal at approximately 100MHz. Mon, 07 Jan 2008 09:49:28 -0500 http://www.electrokits.com/Audio-Amplifiers/Low-Noise-Mic-Preamp This microphone preamplifier circuit features high gain, super low-noise and balanced input. Mon, 07 Jan 2008 09:23:21 -0500 http://www.electrokits.com/Audio-Amplifiers/Headphone-Amp-Balance This simple stereo audio amplifier will amplify audio for your low-medium impedance headphones and give you left/right balance control Mon, 07 Jan 2008 08:54:09 -0500 http://www.electrokits.com/Receivers/5-15-MHz-Microvolt-Receiver This 3-transistor radio receiver circuit is capable of receiving radio signals in the 5-15 MHz Shortwave band, and apparently costs on $10 to build. Fri, 04 Jan 2008 16:56:11 -0500 http://www.electrokits.com/LED-Circuits/8-Flashing-LEDs A circuit with 8 LEDs that flash in a somewhat random fashion (well it's not actually at random, but it does visually appear that way). Fri, 04 Jan 2008 02:31:28 -0500 http://www.electrokits.com/Lights/Neon-Desk-Lamp A low power consumption circuit that uses few components in order to power a 6 inch fluorescent tube (AC) from 12 Volts DC. Thu, 03 Jan 2008 08:33:44 -0500 http://www.electrokits.com/Misc/Lamborghini-Murcielago-Diablo-Videos Now, these aren't related to electronics, but we get a lot of hits from search engines related to Lamborghini videos, so here are some videos to satisfy! Thu, 03 Jan 2008 08:07:10 -0500 http://www.electrokits.com/FM-Radio-Transmitters/Very_Basic_1.5V_FM_Transmitter Dick Cappel's page illustrates an extremely basic small FM transmitter that rebroadcasts sounds using a 1.5 Volt battery. very simple circuit. Wed, 02 Jan 2008 10:22:03 -0500 http://www.electrokits.com/FM-Radio-Transmitters/Portable-1W-TX Schematics / circuit diagrams for a PLL 1 Watt FM radio transmitter that is enclosed in a casing. Oscillator, PLL circuits. Wed, 02 Jan 2008 09:58:02 -0500 http://www.electrokits.com/Sound-Effects/Emergency-Siren-Chime This page links to two electronic circuits. Once circuit produces emergency siren noises (police, fire, ambulance), and the other is a chime type sound effect. Tue, 01 Jan 2008 17:28:59 -0500 http://www.electrokits.com/Audio-Amplifiers/100W-Guitar-Amplifier-MkII PCB plans and circuit diagram (schematic) for what appears to be an extremely nice 100 watt guitar amplifier. Includes preamplifier and power amplifier circuit diagram and PCBs Mon, 31 Dec 2007 12:57:33 -0500 http://www.electrokits.com/Audio-Amplifiers/100-150-Watt-Cheap-Audio-Amp Describes the schematic (circuit diagram) and PCB (Printed Circuit Board) for a cheap 100-150 Watt audio amplifier with few components. Mon, 31 Dec 2007 12:37:53 -0500 http://www.electrokits.com/Audio-Amplifiers/Simple10WAudioAmpSchematic Shows an electronic circuit diagram (schematic) for a simple 10 Watt audio amplifier, using only 4 transistors. Mon, 31 Dec 2007 12:08:48 -0500 http://www.electrokits.com/Datasheets/TL494 Datasheet and PDF Data sheet for the TL494 Pulse Width Modulation (PWM) Control Circuit. Sun, 30 Dec 2007 14:34:35 -0500 http://www.electrokits.com/Datasheets/7805-Datasheet Data sheet for the 7805 (LM7805), a compact IC 5v DC voltage regulator integrated circuit. This page further describes the 7805 and provides Datasheets for the IC device. Sun, 30 Dec 2007 13:16:14 -0500 http://www.electrokits.com/References/Morse-Moris-Code Our Morse Moris code guide shows the Morse code beeps and sounds for the alphabet, which will help you read Morse Code moris code. Also features Alphabetic sounds for Moris Code. Sat, 29 Dec 2007 23:32:34 -0500 http://www.electrokits.com/Telephone/Useful-Telephone-Circuits Features a telephone ring generators, phone line in-use indicators and an audio interface circuit. Sat, 29 Dec 2007 21:52:15 -0500 http://www.electrokits.com/Notch-Filters/Hum-Notch-Filters These 50/60 hz hum filters help remove the unwanted AC mains-line humming or buzzing sound from audio Remove 60 Hz hums. Sat, 29 Dec 2007 14:17:17 -0500 http://www.electrokits.com/FM-Radio-Transmitters/Harrys-v7b-150mW-FM-Transmitter Harry Lythall shares his v7b FM transmitter circuit design. The transmitter outputs 150-300 milliWatts of RF power in the 88-108 MHz band. Fri, 28 Dec 2007 21:41:54 -0500 http://www.electrokits.com/RF-Amplifiers/1-Watt-2.3GHz-RF-Amp-MRF2001 MicroStrip 2.3 GHz (GigaHertz) RF amplifier with 1 Watt RF output power. Fri, 28 Dec 2007 16:40:56 -0500 http://www.electrokits.com/components/HiTechnic_NXT_Circuit_Boards The company HiTechnic has recently released a new NXT Prototyping Board Wed, 28 Nov 2007 02:22:01 -0500 http://www.electrokits.com/components/Identifying-Components Nice article with pictures that assists in the identification of electronic components Sun, 18 Nov 2007 01:28:18 -0500 http://www.electrokits.com/ElectroKits-News/New-News-Section Electrokits launches the News and Articles section Sat, 17 Nov 2007 20:50:03 -0500