Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [blink]

48 questions
33
votes
5 answers

Why do car blinkers flash at twice the speed when a blinker light has burned out

On my 1999 Ford Escort, the brake lights double as turn signal blinkers. A left brake light burned out recently and my blinkers went much faster than normal when signaling a left turn. This is a convenient (and embarrassing) way to be alerted to a…
David Costanzo
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29
votes
9 answers

Blink an LED with just a capacitor?

Is it possible to blink an LED using just a capacitor? (and maybe a resistor). For example, if I want to LED to blink once every 2 seconds. Is that possible? I know it can be done with a 555 as well as with a capacitor and transistor.
mesh
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7
votes
5 answers

simple, energy efficient circuit to make single IR LED blink

I'm using a 850nm IR LED (spec sheet), and in order to extend my battery life, I'd like to make the LED blink (UF 1.9 V, IF 100 mA). I found a couple of links 1, 2, 3 but they either a) require two LEDs that blink in alternation, or a bunch of…
memyself
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7
votes
4 answers

Blinking an LED using a generator as the source of electricity

I made a little windmill which is turning a small generator to light up an LED, but the voltage is too low even with high wind speed for the LED to glow. I thought maybe the electricity could be stored somehow maybe by a capacitor and released when…
hellwisp
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3
votes
3 answers

Strange pin behavior with pic16f88

I have been learning(trying to at least) how to work with pic microcontrollers, and I have noticed this behavior that I am not sure whether it is just my fault or is supposed to happen. I wrote the below program with hopes to make an led blink. It…
a sandwhich
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3
votes
2 answers

Hello world VHDL program - blinking LED

I am trying to get a simple blinking LED program working on my FPGA and I am having problems. Instead of blinking the LED stays on the entire time. I tried writing my on but then I just copied an example program so I'm sure the program is fine. Thi…
ballaw
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2
votes
3 answers

Create a circuit that can flash IR LEDs at 38.5kHz and be turned on or off by microprocessor

Several other questions are posted about methods for flashing an LED, but one additional requirement I have is the ability to turn the circuit on or off with a micro controller (Netduino, 3.3v). This schematic is very close. What changes would be…
James Cadd
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2
votes
6 answers

Blink when input is constant?

I would like to have a status LED to make sure my microcontroller software hasn't faulted. From software, I will alternate an output so if it dies, the output will be constant. I want the status LED to blink when there's a fault instead of blinking…
Drago Rosson
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2
votes
1 answer

How to get two buttons to work with the 16f628a - C, Hi-tech comp, mplabx

I'm just began exploring my new hobby - mcu electronics. I have bought an 16f628a after reading some forumposts suggestion that is a good mcu for beginners. I have download mplabX, the hi-tech compiler and the isis program for simulating my circuit…
Bjorn
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2
votes
6 answers

How to blink an LED (~5Hz) at 3.3V (coin battery) with minimal components to save power?

I need to build a circuit to blink an LED (about 5Hz) with a coin battery, so on 3.3V. Main specifics: Single coin battery (3.3V.) The LED is an SMD5050 with 3V and 100mA maximum. I would save battery as long as I can. The circuit must be very…
Noisemaker
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2
votes
2 answers

Blinking LED at two different frequencies

I am trying to build a circuit that will make a LED to blink at a certain frequency, probably by using 555 timer. As the circuit will be supplied by a 3 Volt battery, so I want to extend a feature that LED should start blinking at a higher…
Arun Lal
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2
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2 answers

STM32F103 GPIO not working

I am programming for LPC microcontrollers (mostly LPC1769), for the past few months with success. I decided though to give STM32 series a try. I just received a no-name board using an STM32F103C8 MCU like the pictured one. I am using Eclipse to…
Fotis Panagiotopoulos
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1
vote
1 answer

How to mimic running lights, turn signals and hazards with LEDs for diecast model

20 years ago I took electronics in school. Did very well, but never used it much since so I have forgotten just about all of it. I have been testing in LTspice and just cannot get anywhere with this. Spent about 12 hours total before searching…
Mtgtnt
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1
vote
2 answers

Launchpad blink with button

I am trying to make LED in MSP430G2 Launchpad keep blinking / off with button like Switch example (http://www.arduino.cc/en/Tutorial/Switch) in Arduino/Energia but I seem to miss something stupid and i don't know what... const int buttonPin = PUSH2;…
Cagurtay
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1
vote
2 answers

Minimum files for Atmega1284p AVR-GCC?

does someone have the minimum setup (ie. a 1284p Makefile and an example blink.c) for an ATMega1284p and AVR-GCC? I seem to be stuck setting things up with using the Arduino IDE and I'd like to test my breadbord setup with a simple blinking LED to…
Christian
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