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Why can’t I connect an external clock oscillator to an ATMEGA64A-AU?

I’ve decided to change my crystal oscillator for one of those smaller (and also expensive-er!) SMD clock oscillators on ATMEGA64A-AU. I’ve found this image on the web, which seems right: So I built my schematic like this : But I’ve got all sort of abnormalities in my MCU when I set it to use the […]

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problem in parsing LTspice data

I am using the ltspice python package to extract the data from the .raw file as seen in this link. However, when I try to apply it to my raw file I get the following error: *Traceback (most recent call last): File "<stdin>", line 1, in <module> File "C:\Python37\lib\site-packages\ltspice\ltspice.py", line 98, in parse self.data_raw = […]

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Need help designing a hairdryer

I’m designing a hairdryer as project for a university class, but I’m having trouble regarding the choice of the motor. I need it to have two possible speeds. My first idea was to use an AC motor and a diode as in the schematic below, when the current flows through the diode, half of the […]

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Polarity tester for 1V to 60V circuit

I am making a circuit board to test the polarity of the batteries. The batteries will have different voltages from 1V to 60V. I want to detect the polarity with two LEDs. See below circuit diagram I drew. It works, but when nothing is connected still one LED turns on.

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nRF24 PCB Antenna Choices

I am trying to create RF module using the nRF24L01P. I am trying to maximize the range while still using a trace antenna. My plan is to combine the simple trace antenna design with the long range antenna design. Short range nRF24 Module Long range nRF24 Module My understanding of the long range design is […]

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Camcorder internal battery identification [closed]

Whenever I change the external battery of a Panasonic HC-VXF999 camcorder, the device forgets the time set previously. I’m assuming this happens because the internal battery is broken and I’d like to replace it. I disassembled the camera but I can’t find it. Any idea which component is the battery? EDIT: The manual in the […]

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Arduino Ask Engineering

How can I use separate power source for the Arduino and the motors

How can use a separate power source for powering Arduino, and another battery for powering the motors? How can I make connections through the motor driver module L298N? I know how normally we use one battery to power the Arduino as well as the motors. But I am facing the problem while using different power […]

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Arduino Ask Engineering

Multi tasking alternative on NodeMCU ESP8266

I’m trying to make an RGB LED strip controlled via Wi-Fi and IR. Until now, I just have made the Wi-Fi server, and It worked just fine. But I wanted to be able to turn the LED strip on and off via IR, the only problem is that I can’t read IR data because of […]

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Connect output of Arduino DUE to input of Arduino Uno

I have a distance sensor connected to an Arduino DUE and I want to wire its output to an Arduino UNO. In Arduino DUE, after calculating the distance, I convert a range of distances (0-10cm) to Volts (0-5V), then I map these to 0-255 values and I do AnalogWrite at the DAC pin. In Arduino […]

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Bitcoin Cryptocurrency Mastering Development

Can anyone give any insight into this command? I believe it’s linked to an JSON-RPC API

Sorry for possibly asking a daft question but during some research I’ve come across the following command: GetBitcoin_blockchain_old Can anyone provide some context for this and how it would be used?