Daylight alarm with 555
Posted on Jun 28, 2012
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 circuit can be used to simulate large capacitances using small value components. With the...
This encoder uses a single contact per key keyboard and provides all other switching function...
Two 555s and a quad NAND-gate IC can simulate an electrocardiograph signal and a -y-wave...
This schematic shows a peak-reading diode voltmeter driven by two stages of amplification. A...
This circuit will power up a water pump when the water reaches a predetermined level. Then it...
This lead acid battery charger circuit is designed in response to a request from Mr. Devdas. C....
This circuit is especially designed for those who often need to wake up early in the morning....
The clock described on this page is the result of both events, a simple single digit nixie clock...
The project is a continuation of the 5kW Boost converter project. After a few failed attempts, I...
Avramenko is a Russian scientist and invented the plug shown in Fig. 1 to transmit electrical...
Novel timing switch circuit in addition to a general timing circuit "Variable Timing"...
characters left: