Off timer with alarm with description
Posted on Feb 4, 2014
Related Circuits
New Circuits
-
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.....
.
The coil is about 25 turns #28 wire on a T-44-6 core, tapped at about 5 turns. I'm too lazy to...
The VTG-01 is designed to display user defined text over a composite video signal. This is useful...
Its frequency depends on the capacitance of the vary cap diode. The center frequency is changed...
The circuit uses an ICM7213 precision one minute/one second timebase generator using a 4.1943 MHz...
The circuit disconnects the battery from the load when output voltage falls below a preset level....
This circuit provides for accurate half wave rectification of the incoming signal. For positive...
The amplifier picks up the TV"s audio output signal and amplifies it to drive a set of earphones...
Over time, many things can cause electrical problems with your Mustang. Components will get old...
The program makes use of the built-in AD converter of the PIC16F874 for sensing the touch...
Wien bridge oscillator is an audio frequency sine wave oscillator of high stability and...
The circuit given here is of a simple H bridge motor driver circuit using easily available...
Inverter or ondulator, is an electronic circuit used to turn direct current (DC) into alternating...
The HS-3182 is a monolithic dielectrically isolated bipolar differential line driver designed to...
The IR Theremin hardware schematic is deliciously simple in that the main input and output...
An AM voice transmitter with variable tuning. The antenna circuit is also tuned and transmits via...
characters left: