Tagged Questions

4
votes
2answers
107 views

Have I fried my Arduino UNO?

So I've recently been playing with my first Arduino, until it, for some weird reason, stopped working. What I did: I had it attached to a breadboard. When I say attached, I mean it was supplying ...
0
votes
2answers
132 views

5v output to 3.3v?

I have a microcontroller and a Raspberry Pi, both running off of the same 5v supply, in parallel. The microcontroller has 4 5v output pins and the other is a Raspberry Pi, that can only accept inputs ...
1
vote
1answer
69 views

Digital Circuit question - sensing input across power rails using a micro

In the Circuit shown below, I am trying to achieve the following (I know my circuit is not correct, it is an attempt). Problem: WHen INPUT_N = 0V, the input to the microcontroller does not go low. ...
1
vote
1answer
107 views

ZXCT1009 as a current monitor

I am currently using ZXCT1009 high side monitor for monitoring the current consumption on a bus line for an embedded system we are developing. I am currently using tek scope with Labview for ...
2
votes
3answers
143 views

Lowering voltage linear [duplicate]

Possible Duplicate: How can I use a 12 V input on a digital Arduino pin? I want to measure a car battery voltage (range is between 10-13v). But my AVR accepts analog inputs from 0-5v. How ...
2
votes
2answers
108 views

Interfacing signals between two parts at different voltage levels

I would like to connect four output pins of a certain IC to four input pins of an AVR microcontroller (Atmega328). I'm running the IC at VCC that varies between 3.50V and 4.00V. It outputs signals ...
3
votes
1answer
155 views

How to use an audio codec as an ADC?

I would like to add ADC functionality to a TI C6748 dev board. I need 16bit precision, but relatively low sample rate(~5K). Not finding any suitable daughter ADC card, I am considering the ...
2
votes
2answers
1k views

Driving a large 7 segment display using a micro-controller

I need to drive a large seven segment display (segment length is a about 2 inches) using a micro-controller (PIC 16F877). I've driven normal seven segments directly from PICs without issues, but I ...
5
votes
5answers
437 views

Running my atmega8 at 5.5V, risky?

I have just received my first microcontroller, an Atmega8. I will soon be making a voltage regulation circuit for it to run at 5V, but I don't have all the parts yet. Instead, I have a 5V DC 1000mA ...
1
vote
2answers
1k views

how can i measure voltage in range -15V to 50V with ADC in microcontroller in a single circuit arrangement for scaling? [duplicate]

Possible Duplicate: How do I measure a negative voltage with a ADC? How do I sample a -2 V to +2 V analog signal with a PIC microcontroller? i want to measure the negative and positive DC ...
3
votes
1answer
188 views

Arduino LilyPad Input Voltages Below the Input Voltage in Specs

The LilyPad spec page says: Input Voltage 2.7-5.5 V I understand that an input voltage greater than 5.5 V would damage the device, but what if it's below 2.7 ...
3
votes
2answers
980 views

3.3v to 5v Translation

I'm in a bit of a pickle here. I need to translate 3.3v to 5v ttl levels. The devices I'm driving (12 total) are not low current devices so I don't want to interface directly, even with a current ...
1
vote
2answers
219 views

Connect a microcontroller to a gadget

Although I have average programming skills, I'm not far from being an noob concerning electronics! I therefore want to kindly ask you to help me connect my (already programmed) Arduino Uno to the ...
2
votes
3answers
461 views

Does this amplifier work with 5V?

I'm using an Arduino to read an analog signal from an electret microphone. Here is the circuit: But I will be powering it with 5V from the Arduino, So would this work okay? Thanks!
6
votes
3answers
1k views

Wide voltage supply for PIC microcontroller

I am looking to power a PIC microcontroller with a supply voltage that ranges from 4.5V to 18V. This will be a battery powered device so I would like to conserve power, ie. linear regulators like the ...