A simple buzzer to convert to an oscillating buzzer so as to obtain the sound similar to that of an automobile`s reverse indicator. I`ve posted a schematic(borrowed from electroschematics. com) below. I intent to replace the LED with my buzzer and omit the resistor. I hope by building this circuit, to make my buzzer `buzz`(or make noise) at an interval of 1 second(since its a 1
Click here to download the full size of the above Circuit.
Hz pulse generator). Would the results be similar to my needs Thank you Steve. I had checked for its current requirements but the device came in a black plastic containment with nothing marked on it. I am not sure of its current requirements and hence decided to omit the resistor to prevent any shortage. Since its a buzzer that runs on a wide range of voltage input(3 volts-12 volts), I figured a bit too much current wouldn`t be a problem either. It will be a problem for the 555 ! It can`t supply an infinite amount of power. You MIGHT get away with just the chip. Measure the current of the buzzer on your bench. There are EQUATONS to calculate the resistors for desired output, but I bypassed those many years ago and just did experiments to determine aproximate value for the charging capacitor to get desired output. Here are my results: Also, for the values of resistors R1 and VR can effect the DUTY-CYCLE. That is the ratio of ON-TIME to the OFF-TIME of the waveform. If the thing you build seems to pulse at ONE second, but it is only a quick "ON-PULSE" then the OFF PULSE seems to last a lot longer. you need to place a variable resistor in place of the R1 resistor and adjust the two variable resistors untill you get the desired DUTY-CYCLE. The 555 circuit you are building will put out a one second pulse, but will not make the TONE you want to hear. But you say you are using a BUZZER for that or just lighting an LED. Be sure...
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.....
characters left: