Cheap positive and negative circuit
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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An LM556 dual oscillator/timer, U1, configured as a two-tone oscillator drives U2, a dual4-watt...
An IBM PC can operate the two 12-bit A/D converters in Fig. 1 via its printer port. The...
This is a single zone alarm - with independently adjustable Exit, Entry and Siren Cut-Off timers....
The losses in a bridge rectifier can easily become significant when low voltages are being...
Many fire alarm circuit is published in different website. But, here in this website is a simple...
The lighting source (i. e. bulb, tube light) glow according to their specified watt rating. If we...
With the advent of modern ICs, sophisticated circuits today no longer have to be complex and...
A photodiode, SFH2030 as an infra red sensor. A MOSFET opamp, CA3140 is used in the differential...
This project uses just one tube. However, the tube chosen (13EM7) actually contains two separate...
How to take the triangle wave waveform and bend it into a sine wave. To help adjust its transfer...
This simple AVR Programmer able to transfer hex programs to mostATMEL AVR microcontrollers. It is...
A surprising number of modules still have an interface based on RS232. No wonder, as RS232 is...
Tesla coils are air-core, resonant transformers. Working at high frequencies, they can generate...
The LM35 series are precision integrated-circuit temperature sensors, whose output voltage is...
The circuit illustrated produces a clean sine wave signal ideal for audio testing, or wherever a...
This circuit uses a Cmos 4017. The 4017 is a decade counter. The count starts at zero. And it...
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