The LM3900 is a Quad Amplifier IC that has become quite popular in electronic circuits. This IC is capable of producing a frequency of square wave in two levels, which can be extremely useful in creating sound alarms for various purposes. One great application of LM3900 is a two tone alarm, which can be used to alert individuals of potential hazards or incidents.
The two tone alarm using LM3900 generates a high frequency and a low frequency sound, which is then mixed together to create a warning sound. This type of alarm is especially effective in alerting individuals of potential danger, as the sound produced is attention-grabbing and easily recognizable.
To make the two tone alarm, we will need a few components, including the LM3900 IC, resistors, capacitors, a loudspeaker, and a power mosfet. The first step is to connect the LM3900 to the power source, which can either be a battery or an AC adapter. Next, we will connect our capacitors and resistors to the LM3900, as per the circuit diagram.
Once we have successfully connected the LM3900 to the power source and the capacitors and resistors, we can then connect our loudspeaker to the IC. It is recommended that we use a power Mosfet to link up the loudspeaker, as this will improve the overall quality of our alarm system.
By following these steps, we will have successfully created a two tone alarm system that uses LM3900 as the primary component. This alarm can be extremely useful in a variety of settings, including factories, laboratories, and other high-risk areas where safety is paramount.
In conclusion, the two tone alarm using LM3900 is an important circuit that has found numerous applications in different industries. Its ability to produce a high and low frequency sound and mix them together to create a warning sound, makes it an effective alarm system that can alert individuals of potential danger. We hope that this guide has been useful in helping you create your own two tone alarm system using LM3900!