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ADE7763 SPI register read issue – I an currently working on SPI communication between PIC24FJ64GA006 and ADE7763. I tried to read the register values of the ADE7763 from PIC but I’m not getting the values. Is there any special initialization needed for ADE7763? Read more

0.2V voltage at PWM output waveform during OFF period – In this PWM output waveform (which is collected from pin PWM0 of a PIC18F4431), there is a 0.2 V drop below zero in the PWM output waveform. In the output waveform of the PWM I see that there is a +5v rise during ON period. But also there is a -0.2 V fall during OFF period. What’s the reason behind this? Read more

Three-phase, fully controlled rectifier design– I am doing a simulation in Proteus. I am using a three-phase AC voltage source. I want to know is it good to:

1. Use one ZCD circuit for say Phase R and then fire the first SCR pair at alpha (firing angle) and then fire the successive SCR pairs with a 60 degree (50 Hz AC, 3.33ms) difference or 3.33ms difference from the previous trigger time?

2.Use three ZCD circuits, one for each phase and fire the SCR pairs? Read more

PIC-to-PC communication and value storage – I am thinking of starting a new project where I would like to use a microcontroller to communicate temperature readings from a temperature sensor that is connected to it to my PC and then have the PC store the data in a text file. In the past, I have experimented with TTL USB UART connection to display readings into putty, but have never saved or collected such data. What would be the best communication protocol? Read more

SMD SMPS power supply – I am designing a Line follow robot which is included step up power supply to boost voltage from 6V to 12 ( DC to DC ) Reason to use Vboost to maintain constant voltage at line detection sensors and motor controller even battery voltage dropped  please advice about a chip that I can use to boost 6v to 12 V and keep it constant even voltage reduced up to threshold level. Read more

How to disable or extend 8-bit timer? – I have a 10-minute timer in an old piece of audio equipment I would really like to get rid of. Inside the device, there is a micro controller CXP5058 that consists of 8-bit timers. In this case an, external oscillator is present which I think is referred to for timing reference. What would be the easiest way extend or disable the timer? Read more

mikro c programming help  -I want to change the value of a byte like this through serial communication. But I don’t know how to have a specified address for a byte on micro AVR ATMEGA64 8 Mhz. Read more

Storage problem in serial memory 24c04 – I have made alarm clock by using an RTC DS1307. I am using serial memory 24c04 for storing multiple alarms and the alarm clock was running successfully without any storage error. But now I purchased a new 24c04 and the alarm hour stored but the alarm minutes are not stored. I have tried three different ICs but the problem is same. Read more

ds3231 I2C1_Wr Issue – I am trying to connect DS3231 RTC to my PIC microcontroller 18f46k22. But my code is getting stuck at I2C1_Wr(DS3231_Write_addr) command. Any idea whats the issue. Read more

Arduino to Atmel Studio – I’m slowly moving from Arduino IDE to Atmel Studio to program the popular Atmega328p. Since the Serial.print() Arduino function is very comfortable and useful, I’m looking for an easy way to display the values of the variables when using Atmel Studio. What is the best way in your opinion? Read more