Battery discharge status indicator circuit
Posted on Mar 28, 2007
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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 linear power supply, shown in the schematic, provides 0-30 volts, at 1 amp, maximum, using a...
The acoustic filters are met in various points in the sound systems. The knownest application...
A general purpose audio power amplifier is a must have for the electronics amateur. It's not a...
Fuzz is one of the classic guitar effects, and this simple circuit generates it quite well. The...
Receiver. Output from the transducer is amplified by Ql and Q2, and rectified by Dl. Voltage on...
The A/B Switch circuit consists of three ICs and a handful of resistors. Two gates from a 4011...
A 4017 decade counter/divider driven from a low-frequency oscillator (Ul-a and Ul-b) is used to...
Stepper motors are a subject that keeps recurring. This little circuit changes a clock signal...
You can control any electrical gadget from any part of the world through your cell phone, that...
The G‚result of the lcd is not correct the thermometer does not show the room temperature but...
A newer version of this circuit board is available. Rev 4 includes a faster CPU, more memory,...
This circuit provides a cheap alternative to the LM3915 series LED displays. The meter relies on...
1C foot VIII made a number of training device, from the trigger terminal CI. f-off positive input...
As shown, the circuit including a four 2-input NAND gate and a CMOS CD4011 type 555, and thus...
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