Communication

Home Telephone Call RecorderHome Telephone Call Recorder

Home Telephone Call Recorder

This is the circuit connection of home telephone call recorder that uses very few components. In order to understand its…

55 years ago
Infrared (IR) Cordless HeadphoneInfrared (IR) Cordless Headphone

Infrared (IR) Cordless Headphone

This is the schematic diagram of Infrared (IR) cordless headphone. Maybe it also can be called "wireless headphone", but it…

55 years ago
Simple Sensitive Tester for Infrared (IR) Remote ControlSimple Sensitive Tester for Infrared (IR) Remote Control

Simple Sensitive Tester for Infrared (IR) Remote Control

This kind of circuit is a helpful device for testing of infrared (IR) based remote control transmitters utilized for TVs…

55 years ago
Remote Control TesterRemote Control Tester

Remote Control Tester

Here is the remote control tester circuit. This circuit is really a simple and easy tester for verifying the basic…

55 years ago
Long Range/Distance Infrared TransmitterLong Range/Distance Infrared Transmitter

Long Range/Distance Infrared Transmitter

Here the long range/distance Infrared transmitter circuit, give you extra power for your Infrared transmitter. The majority of the IR…

55 years ago
Low-Cost and Simple IntercomLow-Cost and Simple Intercom

Low-Cost and Simple Intercom

This is a low-cost and simple intercom circuit design. Some intercom circuits is build by applying integrated circuits. The circuit…

55 years ago
Toy Car Remote ControlToy Car Remote Control

Toy Car Remote Control

The circuit, consisting of an infrared transmitter-receiver pair, utilizes IR beam transmission to switch the toy car "on" or "off',…

55 years ago
Laser Communication (Transmitter – Receiver)Laser Communication (Transmitter – Receiver)

Laser Communication (Transmitter – Receiver)

This is the circuit diagram of laser communication system that transmit the sound or music signals by way of a…

55 years ago
Telephone SwitcherTelephone Switcher

Telephone Switcher

This diagram is the schematic diagram of telephone switcher using relays. This device connects to the telephone line and can…

55 years ago
Telephone Amplifier using LM386Telephone Amplifier using LM386

Telephone Amplifier using LM386

The following diagram is the circuit diagram of telephone amplifier, build based small amplifier IC LM386. This is a easy…

55 years ago