Door circuit text display logic pen 2 CD4011
Posted on Dec 11, 2010
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 circuit enables me to measure inductance of the inductor labeled LX which is the...
A power transistor can be used to provide a high powered zener voltage from a low wattage zener....
In the presence of smoke or gas, the ac output voltage increases and becomes rectified, filtered...
This circuit uses the speed and drive capability of the HA-5190 coupled with two high-speed DMOS...
Water is a precious resource in many parts of the world, and many people rely on water tanks to...
The basic technique is the same like the last lesson except fact that we have added a counter...
A board design that is supposed to measure a loadcell. We have finally tracked a system accuracy...
Solar PV Modules: UL Listed and installed world wide, these solar panels are reliable, with an...
A couple of changes on the dead band and Pulse Stretcher resistors, and the Position feedback...
C1=1000 Micro Farad aluminum electrolytic capacitor (For loads less than 100mA you can sustitute...
This is Wide band high frequency amplifier circuit,Wide frequency band between 75-150 MHz,Using...
The IEEE-1284 bus defines a parallel printer bus specification with speeds above 1MBps. IEEE-1284...
This project article was originally written in 2004 when most computers had parallel ports. This...
The TDA2040 is a monolithic integrated circuit in Pentawatt package, intended for use as an audio...
Circuit R1 R2 + RP + size branch resistance value determines the magnitude of the current I, the...
As shown in FIG MC14541 constituted by a simple timing circuit. The circuit uses IC MC14541...
DC power supply under-voltage, over-voltage indicator circuit shown in Figure 13-93, use it to...
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