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Questions tagged [timer]

Circuit to generate a signal at a specific time after a trigger event. The timing can be defined by an RC time constant, or by clock pulses from an oscillator.

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STM8S003 TIM1 prescaler seemingly not affecting anything

I'm trying to use an STM8S003 chip for a pretty basic function, so I'm standing up the TIM1 peripheral to use output compare. Everything seems to be functioning correctly, except that the pre-scaler ...
InBedded16's user avatar
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0 answers
39 views

How to short time delay controller?

I have an old keyboard which I use for decorative purpose. It has RGB lights which turns on for few seconds when a key is pressed. I want to keep them on at all times. How to achieve this? Can I ...
Saransh Bairagi's user avatar
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1 answer
52 views

ATMEGA2560-16AU PWM control using AVR-C

I'm working on a microcontroller board that also features a couple of motor drivers which can be controlled using PWM signals. I also intend to precisely control the positioning of the motors using ...
hdaniu's user avatar
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1 answer
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STM32L432KC Timer interrupt only triggers once

I am trying to send a message through UART based on Timer 6 interrupt on STM32L432KC microprocessor. The prescaler is set to 39999 and the auto reload is set to 19999 to get an interrupt every 10 ...
kefecik's user avatar
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1 vote
0 answers
14 views

Creating a short signal transmission in HT12E based RF communication

In HT12E we continuously transmit even when the input data pins are not changed.My problem is battery optimisation. I am transmitting only ON/OFF switch state through HT12E based RF module and Since ...
Anandhan A's user avatar
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23 views

AVR128Dx TCB Input Capture issue

Ive made a code for reading SENT sensor using TCB interrupt with event system. It works 90% of the time, but those 10% seems like it doesnt read correct high pulse duration, mby someone will see, what ...
Ralfs Volis's user avatar
4 votes
3 answers
636 views

Do capacitor packages make a difference in MLCCs?

I have a circuit which has an RC dependent timer. I got two types of ceramic capacitors, both of them have literally the same value, but different voltage ratings: 1206  4.7 μF, 25 V capacitor 0805 ...
Hazardous Voltage's user avatar
0 votes
2 answers
105 views

Why is the Relay "Chattering"?

I have this circuit which measures if there is under/over voltage from the AC mains voltage and it consist of two parts: Part one: measuring the input voltage (I had it cropped because it is not the ...
Hazardous Voltage's user avatar
1 vote
1 answer
37 views

Circuit design for a timer and relay

I'm designing a timer circuit that detects white cards with black stripes, which needs to be inserted in a specific position to activate. The black stripe sensor must remain disabled when the card is ...
John Madureira's user avatar
2 votes
2 answers
133 views

Wiring basics for timer relay

I'm not an engineer or electrician, but trying to figure out how I can make this timer relay work for my project. Or figure out if there's a different timer relay better suited to the job. The relay ...
pilibeen's user avatar
1 vote
1 answer
78 views

How to implement a blinking led circuit that is dependent on its voltage input?

I am designing a circuit with two LEDs, where one LED will blink when the output voltage (Vout) is 5V and the other LED will blink when Vout is grounded. I am confident in the functionality of the ...
Ewheel's user avatar
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1 vote
0 answers
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TCC timer from ATSAME54 resets itself

I use an ATSAME54P20A. I want to use the timer TCC0 as a counter. An important function is that I can stop and start the counter again without it resetting itself. According to the data sheet, the ...
userName's user avatar
0 votes
1 answer
29 views

Astable 555 timer staying on

I've recently followed Ben Eater's tutorial on how to make an astable 555 timer with parts that were just hanging around my house, albeit with a NE555P instead of his HA17555. I did not have a 10kOhm ...
Stressed 's user avatar
0 votes
1 answer
50 views

How to use a monostable 555 one shot circuit with a single dc rise at the trigger

In order to measure battery contact fidelity/degradation I am developing a "one shot" current measurement circuit. Basically, when a HV battery is plugged into a connector I will have a ...
wgthompson's user avatar
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0 answers
29 views

Problems with OCR1B on Atmega328p

Trying to control 4 servos (SG90) using 4 pots on an arduino nano and the one connected to OC1B keeps having problems, with bits of jittering and it just not moving correctly (occasionally spinning), ...
jimothy's user avatar
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0 answers
53 views

STM32 DMA timer triggered at specific period with external trigger

I'm trying to interface a CPU that has a parallel bus, and trying to connect it to STM32. The CPU bus is connected to PORTD, I mean by that CS1, CS2, A1, and it's data bus D0 to D7. The CPU has IOWR ...
Andre's user avatar
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0 answers
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N DMA Transfers based on a timer trigger using stm32F429I

I'm trying to use timer 8, stm32f429I, as advanced timer, to do N DMA transfers, that copies data from port D to memory and it does trigger on PC6 after triggering, an N DMA transfers should be shot I ...
Andre's user avatar
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0 votes
2 answers
118 views

How to create a 38 kHz pulsating signal using two 555 timers

I need to create a circuit that will send out a 38 kHz, 50% duty cycle wave for 0.52 ms and then off for 0.39mS. I have searched various sites and I get conflicting information. Some sites state to ...
Rick's user avatar
  • 3
0 votes
1 answer
67 views

DS1307 RTC Time Drift

Do you Know, how much the tolerance of ds1307 RTC is per day? Most importantly, is this time tolerance a fix value or it has random error. Can we fix this problem with code? Edit: By the ...
Saeed's user avatar
  • 21
0 votes
1 answer
48 views

Using STM32F407 to drive 8 pulse pins

I have an application where I need to send send signals to 8 stepper drivers on my STM32F407 Discovery board. Each stepper driver requires an independent PULSE, DIRECTION, and SLEEP signal. DIRECTION ...
jlaufer's user avatar
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0 answers
66 views

Two basic timers on an STM32 don't work simultaneously

I have an STM32L073RZ and it has TIM6,7 basic timers. I need a timer interrupt. TIM7 works fine as I want, but TIM6 doesn't. I tried different settings of prescaler and counter: same as TIM7, almost ...
sneiksus's user avatar
1 vote
0 answers
45 views

how to set 4 timers on ATMEGA2560 to output signals

I am using proteus and C language to compile the code. I have 8 input signals, 4 timers and using it I need to output 4 signals (PF0-PF3). My pin PF0 refuses to work with T2 timer. I can't understand ...
Lex's user avatar
  • 11
0 votes
1 answer
58 views

PWM on STM32F411 is not working using timer1

I am trying to use this code to control brightness of a LED using channel 3 of Timer 1 (PA10 pin) on the STM32F411: ...
JPgiq's user avatar
  • 59
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2 answers
56 views

What type of registers/timers do PIC MCUs use?

Timer1 has the following features: 16-bit timer/counter register pair (TMR1H:TMR1L) What I can't understand is that I couldn't find on the Internet what actual sequential circuit is hiding beneath ...
Awe Kumar Jha's user avatar
0 votes
2 answers
98 views

"Click-to-reset and hold-to-bootloader" button design scheme for an ESP32-S3 development board design

I'm trying to design a development board using an ESP32-S3 MCU. The goal is to have the boot select button act as the lone button as well as do this with a completely analog design: When the ...
Gigoiy's user avatar
  • 1
0 votes
0 answers
21 views

Impulse period measurement using NUCLEO-F401RE board and input capture mode

I have an encoder sensor, which produces high and low levels. I want to capture the period (or frequency) of these levels using NUCLEO-F401RE board and input capture mode for TIM1. I don't want to use ...
Dominykas's user avatar
  • 433
-1 votes
1 answer
44 views

Need help for the definition of timer function

I've found below code that belongs to the timer declaration function but the definition is hidden by the author. Can anyone help me to provide a definition for the same? I want this to be utilized in ...
Ramandeep Singh's user avatar
0 votes
1 answer
144 views

Timed momentary switch modifier

I would like to design a circuit that adds a power off delay What would you suggest, is it possible to solve that basing only on the circuits batteries? Modifier from the market uses own 9V power ...
JSK's user avatar
  • 35
-1 votes
2 answers
125 views

Configuring an astable 555 timer to milliseconds

I am working on a Tinkercad project and I would like a 555 astable clock for it. I am trying to configure the astable 555 timer for every millisecond (or something close). I don't know how to do it, ...
some human's user avatar
0 votes
1 answer
58 views

How can I implement my binary countdown from the output of JK flipflops to two seven segment displays from 15-0?

I am currently making a 2-way traffic stoplight. The stoplight signals are now fully functional. I have no idea how I can implement the 4 bits (not including my MSB because I just need to display 15-...
Yuan Marquez's user avatar
4 votes
3 answers
1k views

Timer circuits - difficulty analyzing

I'm looking for timer circuits without 555 IC and trying to understand them. There are some examples that seem easy to understand, but cannot wrap my head around the others. simulate this circuit &...
steve d.'s user avatar
  • 175
0 votes
1 answer
181 views

NE555 Delay On Off Timer Schematic

I'm trying to make a timer that turns on at a certain time and turns off after 3 seconds, i found a circuit in youtube and made it in proteus, but the output is not the same. Is there a problem with ...
Noobielectrix's user avatar
0 votes
4 answers
105 views

Is there a component that can record circuit on-time without a battery? [closed]

I don't know if such a thing exists already. I'm looking for a component that can record how long a circuit has been powered on. Kind of like the "change filter" light on a fancy vacuum ...
BobaJFET's user avatar
  • 1,012
0 votes
2 answers
90 views

Adding on and off state in a 555 timer clock circuit

I'm making a clock signal for my circuits, and I'm utilizing the 555 timer for this. I made this circuit below which outputs a clock signal. And now I'm trying to figure out how can I add on and off ...
Noobielectrix's user avatar
2 votes
7 answers
424 views

A circuit that temporarily keeps the toy on after pressing the button

I'm working on a project to add a time delay to the button, so that when pressed, the toy plays for, say, 15 seconds and turns off. The toy is intended for children with disabilities and sometimes ...
JSK's user avatar
  • 35
1 vote
1 answer
72 views

Runtime display for last 24 hours

I'm working on a BRX PLC connected to a C-More HMI. I'm using Do-More Designer to write ladder code. I'm looking for ladder logic that will give me the runtime of a circulating pump in the last 24 ...
Geo's user avatar
  • 45
0 votes
2 answers
127 views

15 minute timer between battery and main switch [closed]

I am making a 15 minute timer between battery and main switch such that it doesn't run unnecessarily. I want such that if we press the switch in between it resets to 15 minutes again. I tried using ...
Gaurav Kumar's user avatar
1 vote
1 answer
242 views

Can I use a different channel of a timer at the same time?

I am using AVR128A for a project. It comes with two 16-bit timers (Timer 1 and Timer 3) and two 8-bit timers (Timer 0 and 2). Timer 1 has two channels whereas Timer 3 has three. I have all the timers ...
RK Eshat's user avatar
  • 153
0 votes
1 answer
108 views

555 Timer Delay on Trigger

I am trying to build a circuit which will have an IR sensor. The type of IR sensor is active high. I need to connect the output of the IR sensor to a circuit which will give low output when the sensor ...
Kailash Kumaravel's user avatar
0 votes
3 answers
145 views

Words on 7-Segment Displays [closed]

I'm working on a project that uses three 7-segment displays. My aim is to show the words 'CAT', 'DOG', and 'FOX' using the 3 displays, one word at at time with a 1 second delay in between. To achieve ...
Michael's user avatar
  • 31
0 votes
1 answer
113 views

555 circuit with high input and pulse adjustable output

I found a 555 timer that works with a pulsed input and gives an adjustable single pulse output. (see below). I need the same circuit to work with a constant high input. 8ms input high 4ms output high ...
Energy Hack's user avatar
0 votes
0 answers
75 views

Oneshot Circuit Design Improvement

Question is related to my this question here. I want to trigger a buzzer for 500ms to 1sec whenever a switch is opened, answers on that question didn't produce satisfactory results so I came up with a ...
asim's user avatar
  • 600
0 votes
3 answers
130 views

One Shot buzzer

I want to drive a buzzer for 500 ms when reed switch opens, in simple schematics, when reed switch is closed it keeps Q1 pulled high (maybe I need a resistor too) but the problem with the design is ...
asim's user avatar
  • 600
0 votes
1 answer
89 views

STM32F407 ADC with timer trigger not working for some reason

For STM32F407 discovery board, I tried to establish ADC for measuring voltage at a point, using timer to trigger the ADC, every clock cycle. Somehow I have missed something, because the timer clock is ...
DaveFenner's user avatar
0 votes
1 answer
906 views

Delay with timers for a non-blocking delay

I need microsecond/millisecond delay in my project but I don't want to affect the process flow. I am using an STM32G4. I am using a timer for microseconds delay. This is the function: ...
Sireesha's user avatar
0 votes
1 answer
228 views

How to boost the output voltage of my 555 timer design?

I'm fairly new to the world of electronic design. I'm building an astable 555 timer with the limitation being I can only drive it with a 3v coin cell battery (design has to be lightweight). I've been ...
Eric D's user avatar
  • 1
0 votes
1 answer
80 views

Capture/compare interrupt flag resetting without reading the CCRx

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0 votes
1 answer
103 views

Replacing three-wire timed switch with a microcontroller

The building is surrounded by 6 lights and 4 buttons, 3 of which are illuminated. Right now the circuit is managed by a Perry 1IT 1051. Here are the official schematics: While I'm happy with the ...
Davide Beatrici's user avatar
2 votes
1 answer
123 views

Opinion on Solution for minimal CPU use for STM32 based precision external ADC conversion timing

I have been working on a data acquisition system that requires fairly high sample rates given the resolution and dynamic range requirements. The front end performs well, but to avoid wasting large ...
Luke Gary's user avatar
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0 votes
5 answers
794 views

Is there an extremely simple circuit using 3V to have LED only on for 30 seconds?

Apologies in advance for this probably-grade-school-level question, but, of all the silly things, I want to make a light-up card that turns off after about 30 to 45 seconds. Fading would be a bonus ...
BirdsInMyBrain's user avatar

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