LM358 Audio Level Indicator DIY KIT. SUMMARY: *Important Note: The DIY KIT requires soldering/assembly. No instructions sheet is provided, however, any person with basic-electronic circuit Reading/Assembly will be able to solder all parts to the PCB correctly. Overall assembly difficulty level is Easy. If you have any questions, please ask, thank you. What will I receive? 2 pcs x Complete as pictured LM358 Audio 10-Level Indicator DIY KIT (LED VU Meter). 12 pcs x IC Sockets 8-PIN for the LM358s. Sample Video: 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 and shipped from California. ------- More VU Meters at our store: . ------- International Buyers are Welcome! Any questions that you may have, please contact us, thank you! SHIPPING AND HANDLING: Depending on the size and weight of the item(s) being sold, your order will be deliver 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 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 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