Two Op-Amp Differential Amplifier
The Input Impedance of this module is very high and is symmetric. This circuit can be used for strain gauges and for four wire measurements. If inputs are in mV use OP07. The merit...
LM311 Square Triangle Oscillator for PWM
LM311 is a comparator, It operates from single 5V supply or dual supplies,input current 150 nA, 50 V-50 mA output drive capability. TTL-CMOS compatible output. Even LM324 can be used as a comparator Water Level...
RS232 with Opto-Isolation
I had to once interface an high voltage circuit to PC, The uC had to communicate thru RS232–Comm port–Serial Port.
Insulation Resistance Analyzer Required
Please quote for Insulation Resistance Analyzer DRT101 -mail got around 2002
Current Amp digital control – DMM Project
R6 is the Shunt thru which the current to be measured passes. F1 fuse is to protect shunt. D1-D4 ensures that the current flow is not broken if the shunt blows. The Ammeter is...
Lighting and Power control Automation
i am researching for a project for industrial automation . in this i am having one concept that is following below if any one of person is in room the electrical power should be...
Current Source for Resistance Measurement
Here is a current source you can build for resistance measurement. When the current is held constant, you know as per Ohm’s Law the Voltage across Resistor is proportional to Resistance value. The supply...
Long Duration Linear Sweep or Ramp Generator
I hope you can help me with a circuit. Its a voltage sweep circuit that will sweep from 0v to10v in a 45 min time period, I’m using it for an input on a...
Usage of Schmitt trigger NAND Gates
I have a question about your “Long Duration Timer” circuit, del20017 found here ..Long Duration Timer Clock. You have labeled U1 as a 4093. A 4093 is a NAND with schmitt trigger inputs, yet...
Buffer or Unity Gain Op-Amp
If output impedance of a point is a high value then connecting another circuit at that point will load it resulting in malfunction or error. Buffers are used as interface between circuits. Low impedance...
Single Digit Voltmeter Improvements
I would like to improve that circuit of a single digit voltmeter, I want to make it measure voltage from -9 V to +9 V but I don’t have any idea.so would you please...
uC Board is Buggy on Brown Out
I’m working on a project which involves battery Ni-Mh 4×1.2v, 2100mAh], which power-ups the boards. The current consumption is about 150mA. Now what I wish to do is disconect the load when my battery...
