Universal Instrument Amplifier Development Board ( Prototype Board) Using SMD Components
Universal Instrument Amplifier Development Board ( Prototype Board) Using SMD Components
The Universal Op-Amp Development board is a general purpose blank circuit boards that simplify prototyping circuits for a variety of Op-Amp circuits. The evaluation module board design allows many different circuits to be constructed easily and quickly.
Universal Dual Operational Amplifier (Op-Amp) board is designed to aid in the evaluation and testing of the low voltage/low power and some precision operational amplifiers. This board will accommodate Dual op amp that are assembled in a 8 Pin Dip package. This board is designed to use single or dual amplifiers. Many different circuits can be made such as inverting, non-inverting, differential-In amplifiers and low-pass, band-pass, band reject, or notch second order filters. The amplifier can be powered with single or dual supplies. These circuits can be configured without any modifications to the board, all that is necessary is to select the correct resistors and capacitors. The other optional components can be left open or shorted depending on the configuration desired.
Power is applied to the Header connector pins labeled VCC,-VEE, GND, If a single supply is used, then -VEE should be connected to GND.
This board mainly support lots of Texas instruments Op-Amps, On Semi, Analog Devices
List Of Op-Amps Can be use
Inverting Operational Amplifier Circuit ( Universal Op-Amplifier Development Board)
This is most widely used operational amplifier circuit. It is an amplifier whose closed-loop gain is set by R27 & R18. It can amplify AC or DC Signal.
Non Inverting Operation Amplifier ( Universal Op-Amplifier Development Board)
This simple circuit is a non-inverting Operation Amplifier can be made using universal Op-Amplifier Development Board. Output voltage has same phase as the input voltage ( For DC Input)
Universal Dual Op-Amp Development Board using SMD Components
DC solid state Relay build using optically isolated Mosfet gate driver & high current Mosfet, this relay also provides current feedback as voltage output and fault TTL voltage output when current goes above set point. Current feedback designed around op-amp as signal conditioning which measure the current across low ohm shunt resistor. On board preset (trimmer pot) to adjust the fault current set point. Normally current fault output is high TTL it goes low if fault condition occurs. Circuit available at www.twovolt.com
0-30V , 0-1A Bench Top Power Supply With Constant Current & Constant Voltage
WHAT IS CONSTANT CURRENT AND CONSTANT VOLTAGE POWER SUPPLY??
A Constant Voltage Power Supply
A constant voltage power supply will attempt to hold the target voltage no matter how much current it’s asked to source. So for simplicity’s sake, assume you have a variable resistor (a potentiometer) across the output of a constant voltage power supply and you then vary the resistance which in turn varies the amount of current drawn from the power supply. For an ideal constant voltage power supply the voltage across the variable resistor will hold constant, no matter how much current its delivering.
Of course actual devices will have design limits and at some point you’ll hit a current that’s more than the circuitry of the power supply can handle and at this point the voltage will start to drop and you’ll hit a maximum current. Well designed power supplies will have current limiting or short circuit protection built in to they won’t blow up if someone shorts the output terminals.
A Constant Current Power Supply
An ideal constant current power supply will deliver a constant current to the load no matter how much voltage it needs to do this. So once again for simplicity assume the same variable resistor across the output of a constant current power supply. This time assume that you set the resistance to zero – a short circuit, or very close to a short circuit. The power supply will now deliver the few millivolts or whatever is necessary to drive the specified current, say 1 amp for example.
Now you increase the resistance to 1 ohm. The constant current power supply will increase the output voltage to 1 volt so it can maintain the constant 1 amp current, and so on.
Once again, real world supplies will have design limits and at some point when the load resistance gets too high the supply will no longer be able to drive the voltage high enough to deliver the asked for current and you’ll hit a maximum output voltage.
Above Information Courtesy Mr. Jack Woida Information from https://www.quora.com
Arduino Based open Source Robot Controller With I/O using Dual LMD18201 3Amps Each H-Bridge Motor Driver & Sensors ( Compatible with M-BOT )
Arduino Based open Source Robot Controller With I/Os using Dual L293 h-Bridge Motor Driver & Sensors Compatible with M-BOT
Board Includes following Things
Reflective Object Sensor- Optical Proximity Switch Using PLL LM567
The simple circuit is based on LM567 PLL IC and optical sensor QRD1114 from Fairchild semiconductor. The QRD11114 reflective sensor consists of an infrared emitting diode and an NPN silicon photo Darlington mounted side by side in a black plastic housing. The on-axis radiation of the emitter and the on-axis response of the detector are both perpendicular to the face of the QRD1113/14. The photo Darlington responds to radiation emitted from the diode only when a reflective object or surface is in the field of view of the detector.
Dual-Channel Quadrature Hall-Effect Bipolar Switch Module For Magnetic Encoder for Motion Control application.
The A1230 is a dual-channel, bipolar switch with two Hall-effect sensing elements, each providing a separate digital output for speed and direction signal processing capability. The Hall elements are photolithographically aligned to better than 1 µm. Maintaining accurate mechanical location between the two active Hall elements eliminates the major manufacturing hurdle encountered in fine-pitch detection applications. The A1230 is a highly sensitive, temperature stable magnetic sensing device ideal for use in ring magnet based, speed and direction systems located in harsh automotive and industrial environments.
The A1230 monolithic integrated circuit (IC) contains two independent Hall-effect bipolar switches located 1 mm apart. The digital outputs are out of phase so that the outputs are in quadrature when interfaced with the proper ring magnet design. This allows easy processing of speed and direction signals. Extremely low-drift amplifiers guarantee symmetry between the switches to maintain signal quadrature. The Allegro patented, high-frequency chopper-stabilization technique cancels offsets in each channel providing stable operation over the full specified temperature and voltage ranges.
Additionally, the high-frequency chopping circuits allow an increased analog signal-to-noise ratio at the input of the digital comparators internal to the IC. As a result, the A1230 achieves industry-leading digital output jitter performance that is critical in high performance motor commutation applications. An on-chip low dropout (LDO) regulator allows the use of this device over a wide operating voltage range. Post-assembly factory programming at Allegro provides sensitive switch points that are symmetrical between the two switches.
Bipolar Switch Applications and Working from Allegro Micro
There are four general categories of Hall-effect IC devices that provide a digital output: unipolar switches, bipolar switches, omnipolar switches, and latches. Bipolar switches are described in this application note. Similar application notes on unipolar switches, omnipolar switches, and latches are provided on the Allegro™ website.
Bipolar sensor ICs are designed to be sensitive switches. (Note that the term “bipolar” refers to magnetic polarities, and is not related to bipolar semiconductor chip structures.) A bipolar switch has consistent hysteresis, but individual units have switchpoints that occur in either relatively more positive or more negative ranges. These devices find application where closely-spaced, alternating north and south poles are used, resulting in minimal required magnetic signal amplitude, ΔB, because the alternation of magnetic field polarity ensures switching, and the consistent hysteresis ensures periodicity.
Applications for detecting the position of a rotating shaft, such as in a brushless dc motor (BLDC) are shown in figure 1. The multiple magnets are incorporated into a simple structure referred to as a “ring magnet,” which incorporates alternating zones of opposing magnetic polarity. The IC package adjacent to each ring magnet is the Hall bipolar switch device. When the shaft rotates, the magnetic zones are moved past the Hall device. The device is subjected to the nearest magnetic field and is turned-on when a south field is opposite, and turned-off when a north field is opposite. Note that the branded face of the device is toward the ring magnet.
Inside HP E3610A, HP E3611A, HP3612A Bench Top Power Supply