This is an 8-layer diode-based VCA audio compressor PCB Design that works in mono. The compressor has LED-based gain reduction metering, input gain preamplification control, output gain control, and a fast-attack switch akin to the SSL channel-strip compressors. Included is a full-wave rectifier module I published to the library which is connected to a peak detector block for the attack and release implementation. The module is to be powered by a regular outlet.

This is a peak detector circuit. It comprises of a full-wave rectifier to ensure that both positive and negative peaks are accounted for when taking measurement of the signal peak. It has a response adjust switch terminal that can be used further to determine detection speed.

DAC, Audio 16 b, 24 b, 32 b 384k PCM 20-TSSOP #CommonPartsLibrary #IntegratedCircuit #ADCs #DACs #Data-Acquisition #PCM5102

Bipolar (BJT) Transistor NPN 40V 200 mA 300MHz 300 mW Surface Mount SOT-23-3 (TO-236) The MMBT3904LT1G is a general-purpose NPN bipolar junction transistor designed for switching and amplification applications. It is housed in a compact SOT-23 surface-mount package, making it suitable for high-density PCB designs. This transistor is widely used in low-power signal processing, digital switching, and analog amplification circuits due to its reliable performance and fast switching characteristics. Key Features General-purpose NPN transistor Compact SOT-23 surface-mount package Fast switching speed Low saturation voltage Suitable for low-current and low-power applications High reliability and stability Pb-free, Halogen-free, and RoHS compliant Electrical Characteristics (Typical @ 25°C unless otherwise specified) Collector-Emitter Voltage (VCEO): 40 V Collector-Base Voltage (VCBO): 60 V Emitter-Base Voltage (VEBO): 6 V Collector Current (IC): 200 mA (max) DC Current Gain (hFE): 100 – 300 Collector-Emitter Saturation Voltage (VCE(sat)): 0.2 V (typ) Transition Frequency (fT): ~300 MHz Absolute Maximum Ratings Collector Current (Continuous): 200 mA Power Dissipation: ~225 mW Junction Temperature: +150°C (max) Operating Temperature Range: -55°C to +150°C Storage Temperature Range: -55°C to +150°C Mechanical Characteristics Package Type: SOT-23 (TO-236AB) Mounting Type: Surface Mount Number of Pins: 3 Marking Code: Dependent on lot/manufacturer marking Applications General-purpose switching circuits Signal amplification Digital logic interfacing LED drivers and small load switching Audio and RF signal processing #CommonPartsLibrary #TransistorBJT #MMBT2222

Dual High-Performance, High-Fidelity Audio Operational Amplifier 8-SOIC #CommonPartLibrary #IntegratedCircuits #Amplifiers #Instrumentation #OPAmp #BufferAmps #Linear #LM4562

Telecom Relay DPDT (2 Form C) Through Hole The G6K-2P-Y DC5 is a compact, ultra-miniature signal relay designed for high-density PCB mounting applications. Manufactured by Omron, this relay features a DPDT (2 Form C) contact configuration and operates with a 5 VDC coil. It is optimized for switching low-level signals and is commonly used in telecommunications, test and measurement equipment, and consumer electronics where space-saving and high reliability are critical. Key Features Ultra-miniature, low-profile design for high-density mounting DPDT (2 Form C) contact configuration High sensitivity coil (low power consumption) Gold-clad contacts for low-level signal switching High reliability and long mechanical life Fully sealed construction (flux protection) Suitable for surface-mount and through-hole variants (depending on suffix) Electrical Characteristics Coil Specifications Rated Coil Voltage: 5 VDC Coil Resistance: ~125 Ω Coil Current: ~40 mA Power Consumption: ~200 mW Must Operate Voltage: ≤ 75% of rated voltage Must Release Voltage: ≥ 10% of rated voltage Contact Specifications Contact Configuration: DPDT (2 Form C) Contact Material: Gold-clad silver alloy Contact Rating: 1 A at 30 VDC 0.5 A at 125 VAC Maximum Switching Voltage: 125 VAC / 60 VDC Maximum Switching Current: 1 A Maximum Switching Power: 30 W (DC) 62.5 VA (AC) Timing Characteristics Operate Time: ≤ 3 ms Release Time: ≤ 3 ms Insulation Characteristics Insulation Resistance: ≥ 1,000 MΩ (at 500 VDC) Dielectric Strength: Between Coil and Contacts: 1,000 VAC (1 min) Between Open Contacts: 500 VAC (1 min) Mechanical Characteristics Mounting Type: Through-hole (Y variant, PCB terminal) Weight: ~1 g Enclosure: Sealed (flux-resistant) Environmental Specifications Operating Temperature Range: -40°C to +70°C Storage Temperature Range: -40°C to +85°C Vibration Resistance: 10 to 55 Hz, 1.5 mm double amplitude Shock Resistance: 1,000 m/s² Life Expectancy Mechanical Life: ≥ 100 million operations Electrical Life: ≥ 100,000 operations (at rated load) Applications Telecommunications equipment Test and measurement instruments Audio signal routing Industrial control systems Consumer electronics Package Information Manufacturer: Omron Electronics Series: G6K Part Number: G6K-2P-Y DC5 #commonpartslibrary #relay

ADC, Audio 24 b 216k DSP, PCM 28-SSOP #CommonPartsLibrary #IntegratedCircuit #DataAcquisition #ADC

Sound Plus™ Low-Power, Low-Noise, High-Performance Dual Bipolar-Input Audio Op Amp VSSOP-8 #CommonPartLibrary #IntegratedCircuits #Amplifiers #Instrumentation #OPAmp #BufferAmps #Linear #OPA1692

Buzzers Indicator, Internally Driven Magnetic 3 V 30mA 2.7kHz 80dB @ 3V, 10cm Through Hole PC Pins #commonpartslibrary #audio #buzzer

Audio Amplifier 2 Circuit Rail-to-Rail 8-SOIC #commonpartslibrary #integratedcircuit #audioamplifier

Amplifier IC Headphones, 2-Channel (Stereo) Class AB 16-WQFN (3x3) #Amplifier #Audio #commonpartslibrary