Timer with alarm
Posted on Jun 2, 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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A complete schematic diagram of the voice disguiser is shown. Microphone MIC1 picks up the voice...
Two gates of a 4011 arc used as a comparator. When the resistance of R4 decreases the voltage at...
As the only electronics engineer in my family and circle of friends, it is sometimes not possible...
The on-off-type DC/ DC converter has two kinds of operating modes: One kind keeps the switch duty...
Field bus technology and intelligent instrument technology are automatic and controlling the...
In pure servo mode, it is expected that up to 4 unmodified servos are attached to the board. The...
Be sure to use the correct 9-pin `D` type connector so the pins fit in the board. The two outer...
The LinkSwitch-XT LNK363DN based‚ flyback power supply shown in Figure 1 generates a single...
The PCD3360 is a CMOS integrated circuit, designed to replace the electro-mechanical bell in...
BPS Servo Controller -Digital is total metering and control solution for servo stabilizers for...
This is one of the smallest and neatest FM transmitters to be presented as a construction project...
Application of automatic plotters for measuring solar Schottky gate capacitance - voltage...
As shown in Figure 8 times the low-pass filter circuit. This circuit uses eight low-pass filter...
Darlington is a tube made double clam touch switch circuit is characterized by a touch sheet and...
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