Delay insensitive circuit Puns

Is there any way to create a delay circuit that initially takes, say for example, 1s to turn on, turns on for 2s, then turns of for 10s, then repeat? ive tried to figure out a solution, and all I could come up with is some sort of daisy-chaining delays that wouldn’t work

Update: I came up with a possible solution (however ugly it is) So, I have a power source that powers a delay that, after a given amount time (for example, 31 seconds), turns on for 1s. The power supply would really be powering 29 delay circuits in this example, each taking one second longer than the next to turn on. After 60 seconds, which is when each delay has triggered, the power supply would disconnect, and transistors would short each of the capacitors in the delays, essentially resetting it.

This should work, but boy is it ugly.

Update 2: I forgot to mention that the reason why I turn the first delay on at 31 seconds is because if I do it at, say 29 seconds, it would trigger again at 58 seconds, which I don't want. Now that I think about it, I don't need the second delay, I just made it more complicated

Hi friends!

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Looking for, in order of priority. I can add cash, especially if you’ve got one of my top wants

Red Panda Tensor (!!!!)

Meris Polymoon or Enzo

Demedash T-120

Other red panda stuff (particle 2, raster 2)

Other Meris stuff (not M7 or Hedra)

Whatever might tickle my fancy, always wanted to try an Echo Dream 2. Pretty good on dirt unless you have a new smaller Alpha Haunt, Carcosa or Karma Suture.

As always, shoot your shot as a shot shot is better than an unshot shot when it comes to shooting your shot.

Hey everyone! I hope y’all can help here.

B&K used a pretty minimal design to make these afaik. The amps are a great value, but they didn’t include things like a time delay/soft start, so you get a pop every time the speakers are switched on. I’ve heard of people using a relay to fix this, but I have no idea where to start to avoid harming the sound of the amp! I found some time delay relays but none looked very “audio oriented.”

thanks for any help!

Hobbyist here looking to see if this might be able to be done with a 555 or other components. I can do a Pi if necessary but haven't gotten into those as much.

I have (4) 12VDC LEDs on potentiometers for dimming for a kids playset that do as the title says. Since this is for my toddler son I know he'll/we'll get distracted and forget to turn it off hence the 30 min delay. I'm guessing the hard part may be the input on for the circuit.

Also if anyone has leads on switched potentiometers in the 5K or below range i'd appreciate it. The ones on old TVs or stuff like humidifiers that turn the device on then adjust as necessary.

I receive Signal "A", which is only a pulse

I want to wait 5 seconds

I want to send out Signal "B", also as a pulse

how do i do this?

I noticed that the delay during which you cannot move, can be short-circuited by thitting 'Esc' (to go to the map) twice. Once you leave the black screen, and the world starts to return, hit 'Esc' twice. First one takes you to the map, second one puts you back in control - immediately.

This is on PC, and your key bindings could be different.

So here is the circuit , a 4 order low pass circuit powered by a single supply.

This is what the bode plot looks like when i change the 10uF most [left capacitor to 0.047 farad] (https://imgur.com/a/aHxecJw) . I got the amplitude response i need that has a corner frequency at 200Hz and group delay is constant in the passband.

Now if i change the capacitor to 10u this happens

Group delay isn't constant anymore, why does that happen?

I've previously thrown together some basic AR envelope generators. I'm at the point where I want to upgrade the design to incorporate delay & sustain functions, making it a true ADSR. However, I couldn't find any reading material explaining how they were supposed to work.

https://preview.redd.it/j5urwyekuqm71.jpg?width=636&format=pjpg&auto=webp&s=b512d6b576c6d8a64b3bcddc1abba5649eba448b

So from this basic illustration of an ADSR (that I found online), I can tell that the Attack and Release functions remain the same. The potentiometers for A&R determine how quickly the buffer's non-inverting input charges & discharges (through Ct). I'm not sure how the A2 buffer is supposed to work though. At best guess, it's buffering the Vref (provided by the Sustain pot) and any excess voltage (i.e. above the sustain level) is discharging through the buffer's ground with the rate of discharge being controlled by the decay pot.

Can anybody help me out?

https://preview.redd.it/yzlcxjtrd3j71.png?width=1600&format=png&auto=webp&s=42f0fb0864c574f7828ae1d49638d80beb8b1223

The 555 IC is configured as monostable and has a Ton = 1.1 x 0.0033 C2 x 10M Ohm R2 = 36,000 seconds or 10 Hours and 5 Minutes.

The 74LS04 IC inverts the output and turns off the 2N2222 BJT making the switch S2 unusable until the 555 IC pin 3 output goes LOW after the set amount of time.

Notes:

1. Switch S2 is only pressed momentarily to activate the solenoid coil that unlocks a mechanism.
2. The circuit will be powered by battery and 5v charger in a uninterrupted power supply configuration.
3. Only 1 gate is used in the 74LS04 IC.
4. Switch S1 will trigger the 10 Hour delay.

Questions:

1. Do I need a resistor between the 555 IC pin 3 output and the 74LS04 input pin?
2. Do I need a resistor between the 74LS04 inverted output and the base of the 2N2222 BJT?
3. How much current does the 555 IC use when the output pin 3 is LOW and HIGH?
4. How much current does the 74LS04 IC use when it's output pin is LOW and HIGH?
5. Are there any more suitable alternative for the 74LS04 IC?
6. Can I use an Op Amp like LM358 as a NOT gate to replace the 74LS04 IC?

Updated Notes:

1. I DON'T NEED EXACLTY 10 HOURS, 9 - 11 HOURS IS ACCEPTABLE AND ACCURACY OBVIOUSLY IS NOT MY PRIORITY.
2. I already used a ATTiny85 for this purpose, I'm just experimenting for alternatives.

UPDATE: After some experimentation with the circuit, the capacitor did not reached the required voltage level to turn off pin 3.

Solved!

555 IC not applicable for delay timers that exceeds more than an hour.

Has anyone here altered a tape player to do basically what this expensive pedal does? Something that you can input live audio, have it processed through a regular old tape player at various delay times in real time?

Hey everyone, I'm trying to learn how to do this stuff for a project im working on, but since I'm new to it I don't fully understand everything. I'm trying to make a circuit that gets a signal from a microcontroller, then turns on for about 0.5s after. I looked up some stuff and this 555 ic kept coming up, so I tried to recreate the circuit. I understand what its supposed to do, but I have no idea if I did this right. Any help is appreciated!

SWITCH_01W is the signal from the microcontroller

I just tried putting it together but it didn’t do anything...

Anyone have any reference circuit design or idea that can help me out?

So I have 4 LEDs connected together, they will all recieve the same signal (the signal is contantly high and not a pulse) however I need the 4th LED to turn on after the other 3 (with a specific time) what ciircuit should I use

I need something very simple

Hello All,

So here's my issue I am trying to solve, and I am looking for any input that could be provided.

I am using a small water turbine to power up a little MC (microcontroller) (either a ATTINY or ESP32, not sure which yet). It will then send some data. The turbine is quite low power, maybe 10-20 mA at 3.3V.

The problem I have is that the MC fails on power up due to the ramping of the voltage from 0 - 3.3V. I have provided a solution in which I put the enable pin to low for X time (based on an RC circuit and a 555 timer) and that seems to work, for the ESP. This present issue still is that the power is too low to maintain the circuits output. I end up getting a voltage drop when data sends (maybe 50-10mA) and the MC fails.

To give you a full circuit description:

Turbine that outputs variable voltage from 0-12V (depending on water flow).

A buck converter (high efficiency) converting to a constant 3.3V

A Microcontroller

A delay circuit to delay the enable signal (I'd like to get rid of this if possible)

A small cap (10microF) on the output of the turbine (to prevent ripple)

A large cap (0.1F) on parallel to the MC power (to store power in between data sending)

I feel what I need to complete is a little circuit that essentially waits until a capacitor is charged and then allows the MC to turn on, and then I would send data, and turn off, and it would repeat. I would require this on a constant time period, ideally every second, but could be longer if required.

I've tried putting the MC power through a power on delay transistor circuit and the V drop over the circuit was too high.

I feel like this type of circuit must be used in analog circuitry?

Hi

I have a question concerning the rc delay circuit for the EN pin for an ESP32-WROOM-32E module. The datasheet of the module (https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32e_esp32-wroom-32ue_datasheet_en.pdf) states on page 24 that

>To ensure the power supply to the ESP32 chip during power-up, it is advised to add an RC delay circuit at the EN pin. The recommended setting for the RC delay circuit is usually R = 10 kΩ and C = 1 µF. However, specific parameters should be adjusted based on the power-up timing of the module and the power-up and reset sequence timing of the chip. For ESP32’s power-up and reset sequence timing diagram, please refer to Section Power Scheme in ESP32 Datasheet.

Looking at the datasheet of the ESP32 https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf on page 19 it shows t0 (Time between the 3.3 V rails being brought up and CHIP_PU being activated) as 50 microseconds. I read from this that the delay circuit at the EN pin at minimum must delay for 50 microseconds, right?

https://preview.redd.it/a2fj86ghy7e71.png?width=1282&format=png&auto=webp&s=99902dc616d589093621b3c88f2665e48be377eb

The given values of R = 10 kΩ and C = 1 µF however result in τ = 10000 * 0.000001 = 10ms which is much larger than the 50 microseconds. (Assumption: τ means capacitor is charged to 63.2% after this time, the EN pin would need to get 70% of VDD to be recognised as logic high, so I assume τ is accurate enough as measure for delay?)

On the other hand I found a schemativ for the ESP32 core board V2 https://dl.espressif.com/dl/schematics/ESP32-Core-Board-V2_sch.pdf which uses a 12 kΩ resistor and a 1 nF capacitor. This would result in τ = 12000*0.000000001 = 12 microseconds which is below 50 microseconds.

https://preview.redd.it/ljkfcumky7e71.png?width=472&format=png&auto=webp&s=f0ec283dda6a92486b101cfbb8fe07c56cf40941

I am not sure if I understand the full delay circuit topic of the EN pin correctly, especially with the values calculated from the recommendation and the core board. Could someone explain why the differences and if I get it correct or not at all? How do I calculate correct

https://twitter.com/ACLU/status/1478129338306412546?t=NlhAGrXfOIEELXc0JSY9VA&s=19