Audio Noise Meter

-
Normally, sound intensity up to 30 dB is pleasant. Above 80 dB, it becomes annoying. And if it goes beyond 100 dB, it may affect your psychomotor performance, detracting your attention and causing stress. Noise pollution may also affect your hearing ability.

Comments

Post a Comment

Popular posts from this blog

LCD/LED TV FLASH BIOS / EPROM programming with Serial Flash Memory - W25Q32FV

-
Image
The Winbond 25Q32 is a really cool part : high capacity (32 MBytes), very fast, good support for many standard instructions, supports wide bus modes... But it can be expensive depending on the application. Winbond 25Q32 is commonly used flash memory in the LED/LCD Tv's. Electricians in Sri Lanka call this with the different names such as  FLASH IC PROGRAMMABLE IC BIOS IC EEPROM IC EMMC IC SPI IC There are different series of IC's available in the market i'll mention few here 24 Series  25 Series  29 Series  Electricians mostly call this 24 Series only as Flash IC and the 25 series IC's called as EPROM/ SPI IC.  25 series is the one commonly used for LED or LCD TV's. SPI stands "Serial peripheral Interface" Serial peripheral means electronic device which can operate out of the microcontroller and which supports microcontroller functions. Also this is called as EPROM means "Erasable Programmable Read Only Memory". you can programme this with a ...
Read more

Sony Bravia 55" Double image / Image Flickering ( CKV - Clock Vertical Signal ) LED Panel Repairing

-
Image
Double Image fault solution through CKV, CKVB and STVP Signal Cutting. What is Ckv CKVB STVP in LCD TV?  Pulse-pulse CKV, CKVB, STVP used as pulse “Row driver” or also called “Gate – driver”. … What is CKV in LED TV?  The CKV signal detection circuit comprises a first LED, a second LED, a first light sensor, a second light sensor and a judging module. A node between the first LED and the second LED is used for receiving CKV signals output by the control panel. What is pair a signal ? Pair signals mean after the level shifter section we will get the separate output like CKV 1 , CKVB 1 and STV 1. before entering to Gate Driver IC [ COF ] these three signals are synchronizing each other its called signal paring. depending on COF ic this pair will be increase or decrease. example single COF IC is available in scalar board single pair signal only available (ckv 1,ckvb 1, stv 1) ckv is a positive pulse and ckvb is a generally negative pulse. CKV SIGNAL Other Names  COG, Gate dr...
Read more

CIRCUIT TO CREATE 16 DIGITAL INPUTS FROM 5 DIGITAL PINS OF ARDUINO MEGA

-
Image
If the circuit is not working, remove the potential divider resistors connected to the 9 th  pin of both 74165 ICs and connect the 9 th  pin of both 74165 ICs to corresponding digital pin of arduino mega directly without any resistors. That is, connect 9 th  pin of 1 st  74165 to digital pin 12 of arduino mega and 9 th  pin of 2 nd  74165 to digital pin 10 of arduino mega. From the circuit, it is clear that A – H pins of both 74165s is connected to 5V through pull up resistors of 1K. Pull up resistors helps to keep the state of A – H pins of 74165s to HIGH when the press button switches are not pressed. Similarly, when the press button switches are pressed, corresponding pins of 74165 get grounded through the press button switches. That is, state of that pins will become LOW.  Pin out Diagram of 74165 Pin out diagram of 74165 is given below. 74165 has 16 pins out of which eight pins (A, B, C, D, E, F, G and H) are paral...
Read more