This beautiful sound level meter is a perfect chip replacement for a standard analog meter. The entire circuit is based on the LM3915 's audio level IC, using very few external components.
schematic diagram
schematic diagram
Original schematic
Components
Comment
1. V + can be anywhere from 3V to 20V.
2. The input is designed for standard audio line voltage (1V PP) and the maximum input voltage is 1.3V.
3. Pin 9 can be disconnected from ground, allowing the circuit to use a moving point instead of a bar graph display.
At present, flat Zinc bar is the ideal material for the zinc static and dynamic balance block of vehicle wheel, with good corrosion resistance.
Excellent mechanical properties,elongation is up to 20% or more,the yield of balance pieces stamping is high.
Product specification: Ñ„19mm(width)*2.65mm(thick)
Product packing: 30-150kgs(special packaging specifications can be negotiated)
Flat Zinc Bar,Anode Zinc Bar,Galvanized Zinc Flat Bar,Zinc Coated Steel Flat Bar
Shaoxing Tianlong Tin Materials Co.,Ltd. , https://www.tianlongspray.com