3Amps DC Motor Speed & Direction Controller Using LMD18201 & 555 Timer

The circuit shown here are a DC Motor Speed and Direction Controller. Driver can handle DC Motor Load Up to 3Amp and DC supply 12V to 48V DC, The board is based on LMD18200 which is H-Bridge driver & 555 Timer IC generate PWM signal for speed control. Slide provided for direction Control. PWM duty cycle 10% 95%.

The LMD18201 is a 3A H-Bridge designed for motion control applications. The device is built using a multi- Shorted Load Protection technology process which combines bipolar and Internal Charge Pump with External Bootstrap CMOS control circuitry with DMOS power devices on Capability the same monolithic structure. The H-Bridge configuration is ideal for driving DC and stepper motors. The LMD18201 accommodates peak output currents up to 6A.

  • Motor Supply 12V 48V DC
  • Motor Load 3Amp 12V 48V DC
  • Logic Supply 5V DC
  • SW1 : Slide Switch To Change the Motor Direction CW/CCW
  • Duty Cycle 10% To 95%
  • Frequency 5Khz Approx.
  • Potentiometer Speed Adjust
  • LED Power Indicator

Note : J1 Jumper Close For Normal Operation.

 

MPXM2010GS 0 To 10kPa (0 To 1.45 PSI) Pressure Sensor Module

The MPXM2010GS silicon piezoresistive pressure sensors provide accurate and linear voltage output directly proportional to applied pressure. These sensors house a single monolithic silicon die with strain gauge and thin film resistor network integrated. The sensor is laser trimmed for precise span, offset calibration and temperature compensation. The series includes a strain gauge and thin-film resistor network integrated on each chip

 

Features

  • Temperature Compensated over 0 to +85 C
  • 0 To 10kPa (0 to 1.45psi)
  • Output 25mV Full Scale
  • Supply 10V DC (10-16V Possible)

Applications

  • Respiratory Diagnostics
  • Air Movement Control
  • Controllers
  • Pressure Switching

This Details is from NXP Application AN1950

The resolution of the system is determined by the mm of water represented by each A/D count. As calculated above the system has a span of 226 counts to represent water level up to and including 40cm. Therefore, the resolution is:

Resolution=mm of water/Total # counts=400mm/127 counts=3.1 mm per A/D count

 

Bellow Schematic from NXP Application Note

Window Comparator Circuits

Comparator based window comparator is tiny board, compare the coming voltage weather it is within a specific voltage window. You can set the upper and lower limits of the voltage by adjusting with onboard presets. Circuit works with 5V DC

 

Digitally Controlled Analog Microphone Preamplifier Using PGA2505

The project is based on PGA2505 which is a digitally controlled, analog microphone preamplifier designed for use as a front end for high performance audio analog to digital converters (ADC). The PGA features includes low noise, wide dynamic range, and a differential signal path. An on chip dc servo loop is employed to minimize dc offset, while a common mode servo function may be used to enhance common mode rejection. PGA2504 features a gain range of 9dB through 60dB (3dB/Step) , along with unity gain setting.

 

Universal Dual Op-Amp Development PCB & Schematic using THT 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

  • OPA2350
  • OPA2340
  • LM358
  • LF422

 

 

 

 

 


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)

DC Solid State Relay Using Mosfet & Optically Isolated Gate Driver With Current Feedback & Fault Output

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

 

  • DC Supply 90V DC Maximum
  • Maximum Current Load 15Amps
  • Gate Driver Supply 15V DC

 

1 2 3 4 44