Description:
The LM3915 block diagram consists of ten comparators, on the inverse inputs of which an input signal is applied through a buffer operational amplifier, and direct inputs are connected to…
The LM3915 block diagram consists of ten comparators, on the inverse inputs of which an input signal is applied through a buffer operational amplifier, and direct inputs are connected to the taps of the resistive voltage divider.
The outputs of the comparators are sink current generators, which allows you to connect LEDs without using limiting resistors. Indication can be made either by one LED (point mode), or by a line of luminous LEDs, the height of which is proportional to the level of the input signal (line mode).
The input signal will come from a microphone amplifier, assembled on a low-noise operational amplifier NE5532, at the input of the LM3915 microcircuit chip.
The circuit contains two stages with controlled gain. The gain of the first stage is continuously adjustable by a potentiometer in the range of 1 ... 10 times. The gain of the second stage can be changed in steps using a jumper. If the jumper leads are not shorted together, the gain will be greatest, which is determined by the ratio of R8 and R5 resistors. When a jumper is connected to R6 or R7 in parallel with R8, the gain will be less.
The technical features:
Operating modes: point, line.
LED incremented by one step for every 3dB.
Sound comes from microphone amplifier.
Quantity of LEDs: 20 multi-colored.
Power supply voltage: DC9V - 12V.
Contents in the package:
2 Printed circuit boards.
Radio components.
Fasteners.
Transparent plexiglass.
Power supply.
Instruction.
Additional Information:
Installation and soldering of radio components must be done by yourself.
No country selected, please select your country to see shipping options.
No rates are available for shipping to .
Enter your email address if you'd like to be notified when VU Meter Kit can be shipped to you:
Thanks! We'll let you know when the seller adds shipping rates for your country.
Rates to
Shipping Rate
Tracked
Ships From
First Item
Additional Items
:
Hobby Home Electronics Shipping Policy:
Delivery price depends on the destination country! Shipping price is indicated up to one kilogram of weight!
Shipping rate include a tracking code! You can check the shipping cost using an online calculator. You can find more detailed information on delivery by following the link: https://www.pasts.lv/en/Category/Service_Calculator/
Buyer responsible for custom tax of fees on their country!
If my product is broken in transit, send it back for a full refund or exchange, it’s that easy! If you are not totally satisfied with your purchase and it does not work exactly as described, send me a message and we can arrange a return. I will either send you a replacement or give you a full refund.
Buy with confidence.
Our Tindie Guarantee protects your purchase from fraud. Learn More
By clicking Register, you confirm that you accept our Terms & Conditions
What is a Tindarian?
We recognize our top users by making them a Tindarian. Tindarians have access to secret & unreleased features.
How does one become a Tindarian?
We look for the most active & best members of the Tindie community, and invite them to join. There isn't a selection process or form to fill out. The only way to become a Tindarian is by being a nice & active member of the Tindie community!
/i/849742/products/2020-12-14T14%3A29%3A49.758Z-20200414_161812_006%20%281%29.jpg?1607927447)
