Two line intercom
Posted on Apr 5, 2012
New Circuits
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This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of.... -
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is.... -
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to.... -
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This.... -
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the.... -
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,.... -
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the.... -
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power.... -
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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Clean the surface to be glued components to the printed circuit. Use a sheet of very fine...
The above pictured schematic diagram is just a standard constant current model with a added...
A cadmium sulfide photocell (LDR1, which is a light-dependent resistor) is connected to the base...
A simple solenoid driver uses incandescent lamp filaments as on-indicators to limit power...
The input voltage, V1, causes C1 to charge and produce a ramp voltage at the output of the 741 op...
Non inverting audio amplifier schematic. This Non-inverting audio amplifier circuit may be...
This Phone FM transmitter connects in series to your telephone line and transmits the telephone...
This ultra-simple remote control extender is ideal for use with a hidden video recorder. The...
A simple passive (no power required) circuit to match an antenna to a radio receiver. This will...
This small FM transmitter with a range of about 50 meters designed for connection to the USB...
A low cost high performance programmable home security system using few LDR`s as an input...
A "video-digitiser" (also known as a "frame grabber") captures still pictures frames from a TV...
This simple circuit can be used to program the PIC16F84 and similar "flash memory" type parts. It...
UGN-3501T Hall sensor due to the composition of the counter circuit diagram UGN-3501T has a high...
Activities Modern exhibition, advertising, promotion and propaganda extensive use of sound,...
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