Magnetic Field Sensor With Linear Output Using AD22151

Magnetic field sensor project using AD22151 IC from Analog Devices, The AD22151 is linear magnetic field transducer. The sensor output is a voltage proportional to a magnetic field applied perpendicularly to the package top surface. The sensor combines integrated bulk Hall cell technology and instrument technology to minimize temperature related drifts associated with silicon Hall cell characteristics.

Features

  • Supply 5V DC @ 25mA
  • Power Led On Board
  • Header connector for supply and output
  • Normal Output 1.800V
  • South side Magnet Output 4.800V
  • North side Magnet Output 0.042V

Applications

  • Throttle Position Sensing
  • Pedal Position Sensing
  • Suspension Position Sensing
  • Valve Position Sensing
  • Absolute Position Sensing
  • Proximity Sensing

 

Download PDF Schematic

Download Document

Download Datasheet AD22151

Video With Bar-Graph Display

 

 

 

 

 

 

 

 

 

 

3.1W Stereo-SE Audio Power Amplifier with DC Volume Control LM4952

The LM4952 is a dual audio power amplifier primarily designed for demanding applications in flat panel monitors and TV’s. It is capable of delivering 3.1 watts per channel to a 4Ω single-ended load with less than 1% THD+N when powered by a 12VDC power supply. Eliminating external feedback resistors, an internal, DC controlled, volume control allows easy and variable gain adjustment. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4952 does not require bootstrap capacitors or snubber circuits. Therefore, it is ideally suited for display applications requiring high power and minimal size. The LM4952 features a low-power consumption active-low shutdown mode. Additionally, the LM4952 features an internal thermal shutdown protection mechanism along with short circuit protection. The LM4952 contains advanced pop & click circuitry that eliminates noises which would otherwise occur during turn-on and turn-off transitions.

Key Specifications

  • Supply 12V DC
  • Quiescent Power Supply Current 18mA (typ)
  • VDD = 12V, RL = 4Ω, 10% THD+N 3.8W (typ)
  • Shutdown current 55μA (typ)
  • Volume Control : 0 To 3.3V DC

Features

  • Pop & click circuitry eliminates noise during turn-on and turn-off transitions
  • Low current, active-low shutdown mode
  • Low quiescent current
  • Stereo 3.8W output, RL = 4Ω
  • DC-Controlled volume control
  • Short circuit protection

Download Data Sheet LM4952

 

Applications

  • Flat Panel Monitors
  • Flat panel TV’s
  • Computer Sound Cards

 

 

 

 

68W High Performance Stereo Audio Amplifier Using LM3886

The LM3886 is a high-performance audio power amplifier capable of delivering 68W of continuous average power to a 4Ω load and 38W into 8Ω with 0.1% THD+N from 20Hz–20kHz.

The performance of the LM3886, utilizing its Self Peak Instantaneous Temperature (°Ke) (SPiKe) protection circuitry, puts it in a class above discrete and hybrid amplifiers by providing an inherently, dynamically protected Safe Operating Area (SOA). SPiKe protection means that these parts are completely safeguarded at the output against overvoltage, under voltage, overloads, including shorts to the supplies, thermal runaway, and instantaneous temperature peaks.

The LM3886 maintains an excellent signal-to-noise ratio of greater than 92dB with a typical low noise floor of 2.0µV. It exhibits extremely low THD+N values of 0.03% at the rated output into the rated load over the audio spectrum, and provides excellent linearity with an IMD (SMPTE) typical rating of 0.004%.

Note : Amplifier Required Large Size Heat sink

Features

  • 68W Cont. Avg. Output Power into 4Ω at VCC = ±28V
  • 38W Cont. Avg. Output Power into 8Ω at VCC = ±28V
  • 50W Cont. Avg. Output Power into 8Ω at VCC = ±35V
  • 135W Instantaneous Peak Output Power Capability
  • Signal-to-Noise Ratio ≥ 92dB
  • An Input Mute Function ( J1 & J2 Jumper)
  • Output Protection from a Short to Ground or to the Supplies via Internal Current Limiting Circuitry
  • Output Over-Voltage Protection against Transients from Inductive Loads
  • Supply Under-Voltage Protection, not Allowing Internal Biasing to Occur when |VEE| + |VCC| ≤ 12V, thus Eliminating Turn-On and Turn-Off Transients
  • Input Slandered Audio Line signal

 

 

 

 

 

 

3W Stereo Audio Amplifier Using TDA7266

Tiny stereo audio amplifier board has been designed around SMD TDA7266D IC from ST. The TDA7266D is a dual bridge amplifier specially designed for Portable Audio, for LCD TV/Monitor, PC Motherboard, and TV applications. This circuit provides high quality audio output of 3W approx.  on each channel with standard audio signal input.  The circuit works with 3.5V to 5V. Due to low supply input this amplifier suitable for small size audio gadgets and portable audio applications like MP3 player, Voice messaging system, Warning signals, Annunciator.

Key Features

  • SUPPLY VOLTAGE RANGE 3.5 to 5V (Maximum supply 5V due to small PCB and   small thermal Area)
  •  OUTPUT POWER 3+3W @THD = 10%, RL = 8Ω, VCC = 3.7V (3W Approx.)
  • SINGLE SUPPLY
  • MINIMUM EXTERNAL COMPONENTS NO SVR CAPACITOR NO BOOTSTRAP NO BOUCHEROT CELLS INTERNALLY FIXED GAIN
  • MUTE FUNCTIONS (Jumper Closer)
  • SHORT CIRCUIT PROTECTION
  • THERMAL OVERLOAD PROTECTION

Download Data Sheet TDA7266

 

 

 

 

 

 

 

1.2V To 37V, 3Amp Adjustable Power Supply Using LM2576

This regulator board delivers 3Amp current and adjustable voltage range 1.23V to 37V, with input voltage 40 V.The board built around LM2576-ADJ from Texas instruments. A 3.0 A output current capability power supply that features an adjustable output voltage,  In order to achieve a 10 or more times reduction of output ripple. LM2575ADJ IC also can be used in same project if output current requirement is low as 1Amp.LM2576HVT-ADJ IC Can help to provide higher voltage output range 1.2V-50V @ 3Amp current.

Features

  • Output 1.2 to 37 VDC @ 3 A
  • Onboard Trim-Potentiometer for output voltage adjust
  • On Board Power LED
  • Header Connector For Input & Output
  • Adjustable Version Output Voltage Range, 1.23 to 37 V +/-4%
  • Maximum Over Line and Load Conditions
  • Guaranteed 3.0 A Output Current
  • Wide Input Voltage Range 40V
  • 52 kHz Fixed Frequency Internal Oscillator
  • TTL Shutdown Capability, Low Power Standby Mode
  • High Efficiency
  • Thermal Shutdown and Current Limit Protection

 

 

 

 

 

 

 

 

Download Data Sheet LM2576ADJ

Download Data Sheet LM2575ADJ

 


LM2576HVT Based Circuit can provide higher voltage output Range 1.2V to 50V DC , current upto 3Amps

 

 

12V To 24V, 1Amp Step Up DC-DC Converter Using LM2588

12V To 24V Booster is based on LM2588-ADJ IC from Texas Instruments. The LM2588-ADJ regulator integrated circuit specifically designed for fly-back, step-up (Boost) , and forward converter. The board provides 24V DC 1A DC output, Input 8V to 16V DC. project  has minimum components, screw terminal provided for input & outputs.

Note : Use LM2588-ADJ IC

Features

  • Supply Input 8V To 16V DC ( Ideal 12V DC)
  • Output 24V 1A

 

 

 

 

 

 

 

 

 

Download LM2588 Data Sheet

 

12V-SLA Lead Acid Battery Charger Using BQ24450

The project has been developed to charge the SLA (Lead Acid Battery) . The project helps to charge 12V Lead acid battery up to 12Ah, specific current output possible altering the current sense Resistor.  The BQ24450 chip contains all the necessary circuitry to optimally control the charging of valve-regulated lead-acid batteries. The IC controls the charging current as well as the charging voltage to safely and efficiently charge the battery, maximizing battery capacity and life. Depending on the application, the IC can be configured as a simple constant-voltage float charge controller or a dual-voltage float-cum-boost charge controller.

The built-in precision voltage reference is especially temperature-compensated to track the characteristics of lead-acid cells, and maintains optimum charging voltage over an extended temperature range without using any external components. The ICs low current consumption allows for accurate temperature monitoring by minimizing self-heating effects.

The IC can support a wide range of battery capacities and charging currents, limited only by the selection of the external pass transistor. The versatile driver for the external pass transistor supports both NPN and PNP types and provides at least 25mA of base drive.

In addition to the voltage- and current-regulating amplifiers, the IC features comparators that monitor the charging voltage and current. These comparators feed into an internal state machine that sequences the charge cycle. Some of these comparator outputs are made available as status signals at external pins of the IC. These status and control pins can be connected to a processor, or they can be connected up in flexible ways for standalone applications.

 

  • Input Supply 16V-20V DC
  • Charging Voltage 12V SLA(Lead Acid Battery),AGM
  • Lead Acid Battery 5-12Ah  ( 500mA)

 

 

The circuit is to use dual Transistor for current up to 1A-15Amps, use proper transistor as per current requirement.

NOTE : This board has been designed for dual transistor, for load current up to 1Amp use single PNP transistor as such TIP32 TO220, Omit Q2 and use Q1, Transistor pins configuration as shown in bellow picture. Omit R5 and R6 is 0 Ohms.

 

 

 


6V Lead Acid SLA Battery Charger Circuit Using BQ24450

The bq24450 board assists users in evaluating the BQ24450 linear battery charger IC. The User’s guide the bq24450 bill of materials, schematic. The bq24450 contains all the necessary circuitry to optimally control the charging of lead-acid batteries. The IC controls the charging current as well as the charging voltage to safely and efficiently charge the battery, maximizing battery capacity and life. Depending on the application, the IC can be configured as a simple constant-voltage float charge controller or a dual-voltage float-cum-boost charge controller. This 6V Lead Acid Charger circuit from www.ti.com EVM manual

  • Input Supply 9-13V DC
  • Charging Voltage 6V SLA(Lead Acid Battery),AGM
  • Lead Acid Battery 5-12Ah  ( 500mA)

Download : BQ24450 Data Sheet

Circuit Courtesy www.ti.com

 

 

10 Level AC Motor Speed and ON/OFF Controller Circuit For Modern Appliances Using LS7311

The project specifically designed for motor speed control application in appliances such as blenders, etc. Tact switches provided for selecting/indicating from 1 to 10 power levels ( Speed Levels).  The project is ideal for universal and shaded-pole motor speed control for modern appliances design. Eliminates awkward mechanical switch assemblies and multi-taped motor winding.

Features

  • 10 Tact Switch for Speed Selection
  • 10 LEDS for speed indication
  • On Board Stop and Start Switches ( Start Switch Latch Operation)
  • Momentary Run Switch
  • Supply 230V ( 110V Possible Refer Data sheet for components Change)
  • 300W Load
  • On Board snubber for Inductive Load
  • No Separate DC power supply required

Download Data Sheet LS7311

Download PDF Schematic

 

 

 

 

 

 

Digital Potentiometer Using Optical Rotary Encoder & LS7184

The primary application of the project is to replace the mechanical potentiometer with optical encoder which is long life, accurate, smooth in operation. The simple project has been designed around LS7184 quadrature clock converter IC from LSI semiconductor, AD5220-10 Digital potentiometer from Analog Devices, and optical encoder from Burns.

Quadrature clocks derived from optical encoder, when applied to the A and B inputs of the LS7184, are converted to strings of Clock and an Up/down direction control. These outputs interfaced directly to AD5220-10 Digital potentiometer IC.

The AD5220-10 contains a single channel, 128 positions, and digitally-controlled 10K ohms variable resistor (VR) device. This device performs the same electronic adjustment function as a potentiometer.

Jumper J1 provided for scale of the 3-state input to select resolution x1, x2 or x4. The input quadrature clock rate is multiplied by factors of 1, 2 and 4 in x1, x2 and x4 mode, respectively, in producing the output UP/DN clocks. x1, x2 and x4 modes selected by the MODE input logic.

levels are as follows:

Mode = 0 : x1 selected

Mode = 1 : x2 selected

Mode = Float : x4 selected

Features

  •     Supply 5V DC
  •     J1 Encoder pulse multiplication ( Jumper JL Close =1X, Jumper JH Close = X2, J1 Open = X4)
  •     Header Connector for Supply and Output
  •     Potentiometer Resistance 10K Ohms
  •     R5 Resistor For Programmable output pulse width (200ns to 140μs) – Read Data Sheet
  •     X1 , X2 and X4 mode selection
  •     Excellent regulation of output pulse width
  •     On-chip filtering of inputs for optical or magnetic encoder applications.
  •     TTL compatible I/Os

Note : Input for external component connection. A Resistor (R5) connected between this input and VSS adjusts the output clock pulse width (Tow). Refer to graph for appropriate bias resistor value.

 

 

 

 

 

 

 

 

EXAMPLE CIRCUITS OF LS7184 & LS7183

 

 

DOWNLOAD DATA SHEET LS7184

DOWNLOAD DATA SHEET AD5220

DOWNLOAD DATA SHEET ENA1J-B28-L00128L

 

RC Signal Monitor Using 20 Bargraph LEDs Including RC Switch ( RC Signal Reader Using Bar-Graph Display)

The versatile Bar-Graph SMD components based R/C signal monitor & R/C switch is a great tool for R/C hobbyist R/C modeller and DIY robotics, Tiny Bar-Graph displays provide a Red color bright, easy to read display of Radio Control (R/C) signal from 1mS to 2mS.  This Bar-Graph has 20 segments in single color and display R/C signal in span of 1mS to 2mS. The Barograph RC Signal reader is based on PIC micro-controller PIC16F886. This high performance measurement provides unique capabilities and can be used in various applications like Radio Signal Monitor, Robotics, Machine Control, RC Remote Tester, RC Signal to ON/OFF switch by connecting Relay board or Solid state relay at output of any suitable LED. Multi switches also possible connecting relay boards on all separate LEDs. Solder Jumpers provided on bottom side of PCB to select particular output to interface with Relay or Solid state Relay. PIC16F886 is heart of the project.

Note: This board has been designed for multiple options and has few extra components. Check BOM carefully before soldering the components.  Solder the parts as described in parts list. 

 

 Features

  • Supply 5V DC
  • Input 1mS to 2 Ms
  • Display Range 1.5mS to 2mS Center to Left 10 LEDs & 5mS to 1mS Center to Right 10Leds
  • Output Display 20 Color RED SMD LEDs
  • Compact Board with SMD Components
  • Supply input Header Connecter
  • Solder Jumper on each LED for Output Control, Alarm, and Relay

 

 

 

 

 

 

 

 

 

 

 

 

 

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