CMOS Combination lock
Posted on Mar 10, 2013
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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This signal generator uses a three channel DAC to generate Composite video signal (CVBS) and S...
The following design is capable of overlaying the time and date onto any existing PAL (or...
Simple circuitry suitable for moving-magnet cartridges Passive high-frequency equalization. This...
Most of the IR remotes work reliably within a range of 5 metres. The circuit complexity increases...
Compact Fluorescent Lamps [CFL] are low in price, plentiful and easy to find. Unfortunately, the...
The T7024 is a single supply front-end IC especially designed for applications in the 2. 4 GHz to...
Diagram shows the basic construction of a forward converter. Whereas the energy is temporarily...
This circuit provides you with wireless audio and visual transmission to a TV. The TV acts as a...
This example shows a tunnel diode used to make an oscillator. The two resistors bias the diode in...
You should notice that the opto-isolator LEDs are connected to three wires labeled "FWD", "REV",...
This circuit should be the easiest to tune as well (Reason: when the pulse is at 6V, all...
At some point every ham working with FM radios has need to do some tuning of the transmitter and...
LM4782 uses the system of protection of National Self Peak Instantaneous Temperature ( Ke)...
ptPC1891A application circuit, where in SA is working state switch, a total of four to choose...
1200 to 6000A-10V three-phase thyristor power regulator circuit plating It consists of a main...
A circuit towel} {more i guess oscillations are composed, respectively r Houle Wang oscillator...
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