« Electronic Circuits Homepage

Transmitter Circuits: Build Your Own Radio Transmitter -...

Build a radio transmitter from scratch with these free circuits and schematics.

The plans and schematics listed below provide all of the information need to build your own FM transmitter at home, without any expensive test equipment.

Photo: * USB PLL FM Stereo Transmitter (FCC Approved) * USB PLL FM Stereo Transmitter (FCC Approved)
An excellent Stereo FM Transmitter which operates through the USB port of essentially any computer. FCC Compliant!
Ding-Dong Doorbell. Make your Door Bell go Ding-Dong!
4 Comments - in Ringers / Buzzers
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.
Photo: Motion Detector Movement Detector Components Motion Detector Movement Detector Components
A bit different from other kits. We supply the three basic components for you to make your own movement detector. Included is a PCB mounted fresnel lens, a PIR movement sensor and the latest movement IC just released. Eight pages of application notes show
Photo: Broadcast Warehouse All-in-One 1 Watt FM Transmitter PCB (Fully Assembled) Broadcast Warehouse All-in-One 1 Watt FM Transmitter PCB (Fully Assembled)
This is the Brodcast Warehouse All-in-One PCB 1 Watt FM Transmitter. This item has a built in limiter / compressor & stereo encoder!
Make Your Car Headlights Flash On/Off
0 Comments - in Lights
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 :)
Bingo Game on Your TV - Electronic Circuit
0 Comments - in Fun and Games
A very curious TV Bingo game electronic circuit that will display the Bingo draw numbers on your TV.
Photo: Robotic Curriculum k-12 Robotic Curriculum k-12
Select OWI products for establishing a technology center in your classroom or school. It features: Reproducible printed activities in a lab format for each robot and kit Teacher suggestions and ideas for using the package Complete set of answer keys for a
Photo: LCD PLL Expansion Board LCD PLL Expansion Board
This LCD expansion board upgrades your exisiting BW PLL exciter / transmitter so that it has an LCD readout and easier frequency adjustment.
Photo: PCI Max 2004 - FM Transmitter (PCI Slot FM Transmitter) PCI Max 2004 - FM Transmitter (PCI Slot FM Transmitter)
This PCI-Slot Stereo FM Transmitter broadcasts MP3's and steams on the FM band from your PC. It is controlled via software and will broadcast anywhere on the FM band. Plugs into PCI - FM Transmitter
Photo: PCI FM Transmitter - PCI Max 2004 - FM Transmitter via. PCI Slot PCI FM Transmitter - PCI Max 2004 - FM Transmitter via. PCI Slot
Our PCI-Max 2004 is a Stereo PCI FM Transmitter that broadcasts MP3's and steams on FM from your PC (PCI slot). It is controlled via software and will broadcast anywhere on the FM band.
Photo: Electronic Telephone Kit Electronic Telephone Kit
Learn how a telephone works. Comes complete with all parts and manual. Has the latest features such as automatic redial, mute and flashing neon lights when ringing. The clear plastic case allows you to show your friends your accomplishment.
Photo: Panel Meter 3 1/2 Digit Panel Meter 3 1/2 Digit
This LCD panel meter is a very flexible design that can be customized to your own VOLT meter or AMP meter needs. It may be customized to measure any voltage range, standard or not. Or you can customize it to measure input from a transducer; full details a
Photo: Flasher Multi Sequential 5 LED Flasher Multi Sequential 5 LED
Flashes five very bright LED's in any one of seven, user-selectable, patterns. A COB (chip-on-board) IC makes assembly very easy; the chip is supplied premounted on its own board and a motherboard contains the entire circuit. Operates on 3 volts DC, batte
Photo: Light Alarm Electronic Kit Light Alarm Electronic Kit
A sensitive photo Darlington transistor is used with a CMOS nand gate. The circuit detects light and triggers a siren. You could add your own triac or relay and switch practically anything. The kit uses the MEL12 Darlington super alpha phototransistor, ty
Photo: Sound Activated Electronic Switch Sound Activated Electronic Switch
Adjust the sensitivity of this circuit to control a Relay that can turn on whatever is connected to the contacts of the relay. Very practical circuit for a variety of projects. Turn on a light when your dog barks, or set of a siren when an intruder makes
Photo: Electronic Combination Lock Electronic Kits Electronic Combination Lock Electronic Kits
This really is an excellent introduction to security devices. Set your own four digit code; any wrong key-in sequence resets the lock; correct sequence activates the relay (up to 240VAC contacts). A 9-digit key pad circuit board is separate and connects v
Photo: Photo Sensor with Control Relay Photo Sensor with Control Relay
The most popular use for this kit is to make you own night-light. It can also be used to switch just about any appliance on or off in light or darkness. Light sensitivity is adjustable over quite a range. The relay can handle up to 10 Amps at 110VAC. Oper
Photo: OWI Hyper Line Tracker, Robot Kit, Educational Robot Kit OWI Hyper Line Tracker, Robot Kit, Educational Robot Kit
Similar to lail couriers used in large corporations, the Line Tracker follows a designed course. By using an infrared emitter and light-sensor circuitry, it demonstrates how robots "see" a pathway. Make a pathway with a black felt marker or blac
Photo: Low Cost Stereo Encoder / Generator (Assembled Version) Low Cost Stereo Encoder / Generator (Assembled Version)
Our low cost stereo encoder is the perfect way to transform your radio statio into stereo sound with a low budget.
Photo: Low Cost Stereo Encoder / Generator (Kit Version) Low Cost Stereo Encoder / Generator (Kit Version)
Our low cost stereo encoder is the perfect way to transform your radio statio into stereo sound with a low budget.