Electronic watchdog 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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An AC millivoltmeter - calibrated in dB - with a range of 30V down to 3mV full scale (80dB range)...
This is a mini FM transmitter built and powered using 2 transistors, designed by Tony van Roon....
The employment of the circuit IC1 which build survive astable multi vibrator circuit....
Schematics circuits for guitar effects with vacuum tubes and solid state electronics. DOD R825...
Hmmm, if it is resistive, AC is equivalent to pulsed DC and the sensor is degraded in any case...
This is the circuit of waveform generator. Waveform generator is very useful in electronic...
The 1K resistors in the circuit are essential so that the LED`s turn on at different audio...
This is an automatic emergency lamp with day light sensing, means it senses darkness/night and...
This simple micro-control circuit controls a servo motor according to a 3-state switch. A servo...
This is a new design of a tutorial board based on the popular PIC16F84A microcontroller. It...
The circuit schematic below represents one method for the design on an audio mixer. The active...
A number of operational amplifier circuits are provided here that are set up to be squarewave...
A differentiating circuit is a circuit that produces pulses or that fades out input waveforms...
1.53 voltage controlled gain amplifier FET connected between the two inputs to the op amp as...
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