Delay electronic doorbell circuit - touch doorbell amplifier circuit
Posted on Dec 11, 2010
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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 first circuit energizes the relay when the light rises above the preset level. The second...
Here we use the PIC16711. Rechargeable battery capacity is rated in mAH (milliampere-hours). The...
The functional generator is a device that would have any better equipped electronic lab should...
Ever Imagined controlling your home appliances using your cell phone. You can find a lot of...
This is a car alarm simulator which using the LED as a simulation output. This simple circuit can...
This is the circuit diagram of a light activated switch based on National Semiconductors...
The main component of this circuit is an operational amplifier (such as the 741 or 351),...
This design adopts a well established circuit topology for the power amplifier, using a...
If you want to connect a video signal to several destinations, you need a distribution amplifier...
Consumers have been found manipulating their electric meters, causing them to stop,...
The new TNT features both pre-amp and output gain selection switches, selectable 8watt and 2 watt...
Dynamic‚ip-‚ops ignore pulses at their inputs that are shorter than 40 ns or do not have TTL...
This is higher input or output for L200 voltage regulator circuit. This circuit is designed to...
As shown in FIG constituted by L4960 + 5 ~ + 40V switching power supply circuit. AC 220V voltage...
Dispenser (Aucma) temperature detection control circuit It shows the dispenser (Aucma)...
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