Sound Star KIT with 60 LEDs Microphone and Vu-Meter
#LED
#microphone
#Vu-Meter
#sound reactive
#60 LEDs
#audio visualization
#light effects
#DIY kit
#sound detection
#decoration
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Low impedance microphone amplifier
The circuit is a microphone amplifier for use with low impedance (~200 ohm) microphones. It will work with stabilized voltages between 6-30VDC. If you don`t build the impedance adapter part with T1, you get a micamp for higher impedance microphones....
The LED car voltmeter (2)
This document introduces an LED car voltmeter constructed using the op-amp LM312 and LED components. It is designed to display six voltage levels ranging from 10V to 15V, with each level representing a 1V increment. The working principle of the...
puff to off circuit
This is a circuit diagram of a simple circuit in which the LED can be activated only by a gust of air. A condenser microphone (M1) is used to detect breath. When the S1 button is pressed, transistors Q2 and...
LED Counter with IC 4017
The circuit presented this month is a basic configuration of the very versatile 4017 IC Chip. In the most common use of the IC, it will turn on 10 separate outputs sequentially. Typically, the circuit is used to turn on...
Flashing Eyes
This circuit is designed as a humorous Halloween gadget. It is intended to be placed at the back of a badge or pin featuring a typical Halloween character image, such as a pumpkin, skull, black cat, witch, or ghost. Two...
Phone in use indicator by LED
This circuit is useful to show when your line is busy. I used for this a pair of SMT transistors, the LEDs on when the voltage drops down to 40 V.
The circuit described functions as an indicator for a busy...
Portable Mic Preamplifier
This circuit is mainly intended to provide common home stereo amplifiers with a microphone input. Using a stereo microphone the circuit must be doubled. In this case, two separate level controls are better than a dual-ganged stereo potentiometer. Low current...
Battery Operated LED Lantern
Photo. This is the test circuit -the basic driver is only two transistors, two resistors, the circuit was evaluated using a white LED, but when it was time to button it up and archive it, I replaced the expensive white...
stereo led power vu meter
This circuit detects the AC audio voltage supplied to car radio loudspeakers and visually represents it as power using an LED bar graph, creating an appealing visual effect. It is designed to accommodate typical car radio output power ranges but...