Digital Entry Lock
Posted on Nov 8, 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 decision to use either AM, narrowband FM Oess than 15kHz), or wideband FM (greater than 30...
The AD537 uses its two reference outputs—one fixed at 1 V, the other of which varies with...
This article is for those who wants to make their own car amplifier. The basics of calculation...
After buying an arduino and some 8x8 LED matrices I really needed a project to make good use of...
The following diagram is the schematic diagram of Active Tone Control circuit, or we often call...
I`ve found some interesting schematic of Load Cell amplifier. As we know, load cell amplifier is...
It is a low frequency Wiew bridge sinusoidal oscillator for the audio range with very low...
The Accu charger circuit is very simple and easy to make, because it only requires a few...
This MOT`s LSI is very suitable for designing ham rigs` VFO, which has 4 digit BCD preset...
This set of two circuits from the basis for a very simple light wave transmitter. A LASER beam is...
This circuit seems interesting and I wanted to simulate and construct it, but the problem is I do...
Channel 7 has a circuit diagram of a smart temperature sensor MAX6698 is shown in Figure:...
Figure 1-30 is an example of an OCL power amplifier circuit, the following specific analysis: In...
characters left: