555 Fm Circuit Circuit
Posted on May 18, 2012
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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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Probably the easiest way of doing automatic switch off is with relay logic. In the diagram, the...
The circuit will modulate the light from the LED using a crystal microphone or a loudspeaker...
This power factor controller accept voltage from 90 to 268 Vac, that`s why we call it power...
This circuit was submitted by Lazar Pancic from Yugoslavia. The sound card for a PC generally has...
Keyboard is a basic and essential element of an embedded or microcontroller system. For small and...
Here`s the circuit diagram based on PIR motion sensor module BS1600 (or BS1700) that can be used...
Speed regulation is accomplished by sensing the motor current with R17 and using it as positive...
This smoke detector circuit diagram is based on the SD2 CMOS Photo-Electric Smoke Detector...
The 74L121 and 74L122 ICs pin out diagram works any any style 74xx121 or 74xx122 DIP chip, but...
This is a fan controller for an audio/video cabinet. It uses a PICAXE 08M and a DS18B20...
The circuit described here is of an economical smooth variable power supply which offers 0V to...
4X4 matrix keyboard system settings, including 0 ~ 9 numeric keys. A ~ F as function keys. The...
Electronic thermometers as shown in the circuit. RT is the thermistor, A is an integrated...
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