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  • Rain Sound Generator Circuit

  • Created: Sep 03, 2014

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Summary

The Rain Sound Generator device is designed to replicate the sound of the rain by using MCP6001 operational amplifier. It supports rail to rail input and output swing and has a gain bandwidth of 1MHz. Rain sound assumed to induce relaxation as well as to help boost concentration to humans. As observed, cities are evidently noisy considering the existence of industries, automobiles and other entities that affect our sense of hearing and nervous systems causing distractions and deterioration of organ functions. However, with the rain sound generator, it may be minimized by benefitting the listeners to sleep better and increase their level of concentration in studying or while working on something.

The MCP6001 is a single general-purpose op amp offering rail-to-rail input and output over the 1.8V to 6V operating range. This amplifier has a typical GBWP of 1MHz with typical quiescent current of 100 microamperes. The MCP6001 is available in SC-70 and SOT-23 packages. The MCP6001 is a single general-purpose op amp offering rail-to-rail input and output over the 1.8V to 6V operating range. This amplifier has a typical GBWP of 1MHz with typical quiescent current of 100µA. The MCP6001 is available in SC-70 and SOT-23 packages.

In the circuit, Q1 is used as a noise generator and the MCP6001 IC amplifies its signal. Thru Q2, R7 and C4 go to a headset with low resistance. If you do not want to use the headphones then use a speaker with impedance between 4Ω and 16Ω. With the help of RP1 can adjust sound level and with RP2 the tone. This makes a perfect rain sound effect, which will mostly alleviate insomnia problems. Insomnia treatment consists mostly of sleeping pills consumption but this circuit is an alternative for that and consists of a simple circuitry that generates a rain sound effect. The Japanese researchers were the first to discover that sound of rain has a relaxing effect. With the help of this simple circuit we can generate the rain sound, which can be a sleep aid in case of insomnia.

3 Comments


Charles Bell

Are the VIN_P and VIN_N ports of the op-amp reversed in the schematic? I'm going to try building the circuit. v/r Charles Bell

Posted: Oct 26, 2014


StevenJGreenfield

This wasn't copied from someone else's page, was it? I ask because I notice that part of the explanation says "741", and it refers to the transistors, Q1 and Q2, as T1 and T2. RP1 and RP2 are referred to as P1 and P2. I'm a bit surprised that this is a featured project in my EEWeb email. It could have been drawn a lot better. No pin numbers on the IC? A non-standard confusing box instead of an Op Amp symbol? Strangely placed grounds and components? And as Charles Bell points out, the inverting and non-inverting inputs seem to be reversed. Very strange.

Posted: Oct 27, 2014


Microchip Technology

Hi Steven, its just a little error on our side. The OpAmp used is a standard MCP6001. You could check the IC on microchips website.

Posted: Oct 27, 2014


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