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Isolated dc-dc/minimum load
1. In one of my circuit I need isolated dc-dc converter. 2. Input is 4.5 to 6V & output required is 5V. I have selected a 9V dc-dc & then will use a linear regulator to...
Monday, 16 March 2015 - 08:29
Selecting right buffer for dac
I am using TI's Dac8568 (16 bit 0-5V). I need a buffer IC at output of each dac. 1. Buffer IC should be operate from single supply 5V. 2. Able to supply upto 10mA (flexible on...
Monday, 16 March 2015 - 08:20
Phase control Shaded pole motor
1. I have to control the speed of shaded pole motor. For this i have selected phase control method using TRIAC. I have a connected a 10K pot at adc input of MCU, as pot is rotated...
Friday, 13 March 2015 - 11:57
ADXL375 offset register/Shock Threshold
1. I have to write offset register values in adxl375. On putting device so that x = 0g , y = 0g & z = 1g I get output valuesfrom adxl375 as; xreg = -14 , yreg = 15 & zreg...
Wednesday, 11 March 2015 - 11:58
Purpose of Strange pcb track
I have attached some of PCB's showing strange PCb track. (zoom out file to 50% for clarity). What is their purpose. Shouldn't they be straight way connected?  
Monday, 9 March 2015 - 06:50
Dac - 16 bit; 0-5V
I am looking for 16 bit dac & 16 channel with 0-5V. Also application is battery powered, so I need DAC to put in sleep when not required. I had found this octal dac;low power...
Saturday, 7 March 2015 - 15:27
Solving bridge equation
1. I am using wheatstone bridge to measure change in resistance. 2. Bridge is excited by IDAC instead of voltage source. 3. I have made a equation for it in term of voltage output...
Wednesday, 4 March 2015 - 08:55
Relay turn on resistance increases
1. I have a digitally controlled resistance series network. 2. What I have done is placing a resistor at output terminals of each relay. I have 6 relays. Whenever i need that...
Saturday, 28 February 2015 - 06:44
Street light communication
1. I am planing a project explaining how street light can be made more intelligent with smart batteries & other features. 2. I am thinking on what communication should I use....
Friday, 27 February 2015 - 08:55
Calibrating time measured on pulses received
1. I have to measure time between two pulse signal coming on two pins. As soon as rising edge comes on pin 1, I start the timer until second signal on other pin. So basically time...
Monday, 23 February 2015 - 10:15
Control RPM motor
1. I have to control the rpm of motor. There is feedback in pulses by which I can see what is the rpm of motor. 2. I am planning to do it by phase control.  a. Read PWM...
Thursday, 19 February 2015 - 10:17
Ideal diode alternative
I have to place a ideal diode in my circuit. ideal didoe means very low power.  My applicaiton is to to reverse polarity protection. Vin = 20V max & Iout = 1A max....
Thursday, 12 February 2015 - 11:03