myTEKNOVO Listings on eCRATER SUMMARY: *Important Note: This DIY KIT has been fully assembled and tested. Buyer will receive a complete and soldered functional KIT. If you have any questions, please ask over the eCRATER messages, thank you. *LEDs on PCB: The KIT comes soldered with GREEN LEDs only, thank you. What will I receive? 2 pcs x Fully Assembled KIT LM358 Audio Level Indicator as pictured (VU Meter). Sample Video: View sample video --HERE-- Description: The LM358 is implemented as an amplifier to the audio input provided by the microphone. Note that the microphone can be replaced and instead use it as line input. Line input example: Audio output from a CD-Player/MP3 Player etc. If the user decides to utilize the audio output from an already amplified audio signal, then the sensitivity of the VU Meter must be set to minimum. The sensitivity can be adjusted by the 470 KOhm variable resistor (please refer to circuit schematic for details). The remainder 5-LM358s (bottom of circuit schematic) are used as voltage comparators to indicate the audio/sound signal level. USA Inventory / Stock: All items for sale are in stock at hand and shipped from California. True USA Based Seller. ======= You can view more DIY KITs at our store - Click Here -. ======= Related: LED, LED Bargraph, LED Bar Graph, Arduino BarGraph, LED Display, LM3915, audio/sound level indicator. *** If you have any questions, please contact us. *** INTERNATIONAL BUYERS ARE WELCOME SHIPPING AND HANDLING: Depending on the size and weight of the item(s) being sold, your order will be delivered via the following shipping carriers: To verify the shipping carrier being used, please check the "Shipping Information" section at the bottom or top part of this ad. Make sure to also check the processing time of the order. If we have delays on your order we will contact you within 24-48 hrs. We combine shipping charges, please ask us for the correct invoice once you have completed your order. PAYMENT METHODS: PayPal payments. Credit Cards (managed through PayPal only). myTEKNOVO: Visit our listings on eCRATER for more cool items. You can contact us regarding any bulk(by quantity) order that you would like to place. We give discount on bulk orders, please ask us. myTEKNOVO