The uA723 is a precision integrated-circuit voltage regulator, featuring high ripple rejection, excellent input and load regulation, excellent temperature stability, and low standby current. The circuit consists of a temperature-compensated reference-voltage amplifier, an error amplifier, a 150-mA output transistor, and an adjustable-output current limiter.The uA723 is characterized for operation from 0C to 70C.

• Input Offset Voltage Options of 6.0 mV and 15 mV Max
• Low Input Bias Current: 30 pA
• Low Input Offset Current: 5.0 pA
• Wide Gain Bandwidth: 4.0 MHz
• High Slew Rate: 13 V/s
• Low Supply Current: 1.4 mA per Amplifier
• High Input Impedance: 1012

• Can drive 2 DC motors simultaneously in either direction
• Wide voltage supply range: 4.5V to 36V
• Separate input-logic supply
• Internal ESD protection
• High-noise-immunity inputs
• Thermal shutdown
• Output clamp diodes for inductive transient suppression

• Very low supply current drain (500 A)  essentially independent of supply voltage
• Low input offset voltage: 2 mV
• Input common-mode voltage range includes ground
• Differential input voltage range equal to the power supply voltage
• Large output voltage swing: 0V to V+  1.5V
• Internally frequency compensated for unity gain
• Large dc voltage gain: 100 dB
• Wide bandwidth (unity gain): 1 MHz (temperature compensated)

4N35 optocoupler consists of gallium arsenide infrared LED and a silicon NPN phototransistor.Isolation test voltage 5000 VRMS. Input-output coupling capacitance < 0.5 pF . 4N35 optocoupler consists of gallium arsenide infrared LED and a silicon NPN phototransistor.Isolation test voltage 5000 VRMS. Input-output coupling capacitance < 0.5 pF . 4N35 optocoupler consists of gallium arsenide infrared LED and a silicon NPN phototransistor.Isolation test voltage 5000 VRMS. Input-output coupling capacitance < 0.5 pF .

• Four individually operated voltage comparators
• Low noise interference among comparators
• Single Supply Operation: +3.0 V to +36 V
• Dual Supply Operation: +18V and -18V
• Low Input Bias Current: 25 nA
• Low Input Offset Current: 5.0 nA
• Low Input Offset Voltage
• Input Common Mode Voltage Range to GND
• Low Output Saturation Voltage: 130 mV @ 4.0 mA
• TTL and CMOS compatible
• ESD Clamps on the inputs increase reliability without affecting device operation
• Pb Free, Halogen Free/BFR Free and RoHS compliant

LM386 is a widely used audio amplifier IC manufactured in 8 pin dip, VSSOP, SOIC and other packages. The IC is basically designed for low voltage commercial applications, apart from commercial applications it is also a famous IC among electronic hobbyists and experimenters. The internal gain of the IC is set to 20 but it can be adjusted by connecting a resistor and a capacitor in series between the pin number 1 and 8, by this procedure the user can adjust the gain between 20 to 200. Due to the small size, low quiescent current and low voltage requirements this IC is ideal to use in wide variety of portable battery operated applications and devices.

The ATMEGA328P-PU is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATmega328P-PU achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.
The AVR core combines a rich instruction set with 32 general purpose working registers. All the 32 registers are directly connected to the Arithmetic Logic Unit (ALU),allowing two independent registers to be accessed in one single instruction executed in one clock cycle. The resulting architecture is more code efficient while achieving throughputs up to ten times faster than conventional CISC microcontrollers.

The ATmega328P-PU AVR is supported with a full suite of program and system development tools including: C Compilers, Macro Assemblers, Program Debugger/Simulators, In-Circuit Emulators, and Evaluation kits.