Automatic emergency lamp circuit
Posted on Mar 28, 2007
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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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Pressing the pushbutton of the transmitter, a sound and/or light alert is activated in the...
This circuit will generate a smaller DC output voltage from a larger DC input voltage.It is quick...
I2C are widely use for to communicate with external peripheral such as port expender, EEPROM,...
The Colpitis sinusoidal oscillator provides stable output amplitude and frequency from 0°F to...
The circuit receives its power from a 15-V wall adapter (not shown). The circuit takes advantage...
This system is a control system based on one-chip computer, control the system light in...
In many projects use is made of alphanumeric LCDs that are driven internally by Hitachi`s...
We`ve all had occasion to be annoyed at inconsiderate dog owners whose animals relieve themselves...
This is a very excellent 40W power amplifier design using TDA2030 IC and two transistors. The...
This SMD FM transmitter has an operating frequency of about 80 to 115MHz. Under reasonable...
However since the ROM is mapped in at &F000, this in binary is %1111 0000 0000 0000; or in other...
Binary Coded Decimal is a number system that only counts from 0 to 9 and then repeats. The table...
The CODE and CONST memory classes are typically stored in ROM that may be either off-chip or...
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