Digital Entry Lock Circuit
Posted on Jun 28, 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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The following diagram is for the main circuit of the motor driver. A testing version is...
This circuit was designed to make switching of a 48-channel mobile transceiver safe to operate...
This is one of mine projects which can be helpful for controlling water level in water tank. I...
This includes a 220uF capacitor and two diodes to slow down the switch-on to reduce the output...
The photodiode can be used to detect IR reflected from the object. However, IR produced by the...
This is a minimal circuit which I built to individual of my audio amplifier projects to control...
The whole system was built in a package that was about 70mm x 96mm x 30mm which contained the...
A photo or slightly activated relay normally open relay in the closed circuit / contact with the...
This is a slight modification of that circuit. In the previous circuit you have to keep the...
After the unexpectedly big success of my JFET bass preamp I decided to build an onboard version....
An electrical circuit that ensures that when two or more generators are connected in parallel to...
To resolve SSB or CW, a BFO signal may be coupled into the intermediate frequency amplifier. In...
Xpressnet is a bus system for model railways to interconnect input devices, computer interfaces...
This is an enhanced version of the simple Garage/Shed Alarm. The Entry and Exit delays have been...
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