Low power timer switch
Posted on Mar 28, 2007
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 VTG-01 is designed to display user defined text over a composite video signal. This is useful...
This circuit is a 20W Audio Amplifier kit, based on the TDA2005 IC, a class B dual audio...
This simple circuit is a gain-of-1000 inverting amplifier. It will amplify submillivolt signals...
A window detector is a specialized comparator circuit designed to detect the presence of a...
The temperature sensor provides an input to pin 3 of the NE5037 of 32 mV/°C. This 32 mV is the...
The base of Ql is connected to the car`s ignition circuit; the easiest point to make that...
All you need to do is supply a resistor (I used 200 Ohms, with a 3. 3V supply) to the power line,...
Piezo buzzers can be found everywhere, next time you throw out an old smoke detector be sure to...
This circuit was taken from a remote control tarantula transmitter operating at 49. 86MHz. The...
You can clearly see the three stages found in many audio amps (and op amps today). However,...
To design and build a wireless transmitter that works over the FM frequency and allows the...
Both transistors should be low noise types. In the original circuit, I used BC650C which is an...
The Intersil ICL32XX devices are 3. 0V to 5. 5V powered RS-232 transmitters/receivers which meet...
This broadband AM receiver enables you to monitor` the shortwave radio band. The circuit has been...
Human approach detector circuit is composed of integrated operational amplifier, gate circuit and...
These "ion chambers" are nothing more than a bare wire stuck through a hole into a metal can! No...
You need to find a reliable full bridge driver to drive your flyback transformer? Well, This is...
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