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Thank you so much. I will try this and get back to you. I truly appreciate this.
Simple Timer Circuit - Will this circuit work?
- Thread starter David Nolan
- Start date
Thank you so much. I will try this and get back to you. I truly appreciate this.
I didn't say the Video was fake, but I wouldn't doubt it for a minute.
Start-out by finding or asking for a Schematic-Diagram.
(There are already several good ones here in this Thread)
The "Language" of a Schematic-Diagram is usually completely universal
and transcends most Spoken Language Barriers.
That way, anyone that looks at it can usually figure-out how it is meant to work,
usually in just a few minutes, Seconds in the case of Your Circuit.
Your drawing almost makes me go blind, and not want to look any further,
this is nothing against your efforts, it just doesn't communicate well.
Probably the biggest initial hurdle to overcome is the fact that Schematics
quite often pay no attention to the physical layout of the completed Circuit,
but simply use "Pin-numbers" arranged in the most convenient position,
on an otherwise blank square box with a part number on it.
So, quite often, there are several steps to complete before actually building the project.
The Schematic is for recognizing any obvious problems in how the Circuit is
supposed to operate and interface with it's various other parts,
and it's Inputs and Outputs, what the expected end result should be, and WHY.
Once all of this is done, it's then time to decide on a method of construction
that is within your resources, and your experience.
A manufactured, Perforated-Circuit-Board with an appropriate 8-Pin Socket
is probably a good place to start.
.
.
.
Print these pictures out with a Printer so that You can draw on them.
.
.
The socket is so that You can easily replace the 555 Chip if You smoke it.
Since this is your first project,
expect to smoke 3 or 4 of them before You get your inevitable mistakes figured out.
.
.
.
Start-out by finding or asking for a Schematic-Diagram.
(There are already several good ones here in this Thread)
The "Language" of a Schematic-Diagram is usually completely universal
and transcends most Spoken Language Barriers.
That way, anyone that looks at it can usually figure-out how it is meant to work,
usually in just a few minutes, Seconds in the case of Your Circuit.
Your drawing almost makes me go blind, and not want to look any further,
this is nothing against your efforts, it just doesn't communicate well.
Probably the biggest initial hurdle to overcome is the fact that Schematics
quite often pay no attention to the physical layout of the completed Circuit,
but simply use "Pin-numbers" arranged in the most convenient position,
on an otherwise blank square box with a part number on it.
So, quite often, there are several steps to complete before actually building the project.
The Schematic is for recognizing any obvious problems in how the Circuit is
supposed to operate and interface with it's various other parts,
and it's Inputs and Outputs, what the expected end result should be, and WHY.
Once all of this is done, it's then time to decide on a method of construction
that is within your resources, and your experience.
A manufactured, Perforated-Circuit-Board with an appropriate 8-Pin Socket
is probably a good place to start.
.
. .Print these pictures out with a Printer so that You can draw on them.
.
.The socket is so that You can easily replace the 555 Chip if You smoke it.
Since this is your first project,
expect to smoke 3 or 4 of them before You get your inevitable mistakes figured out.
.
.
.
mike_dolphin
- Joined Aug 30, 2021
- 1
Thanks for the links. I'm also a total beginner and had no idea where to start.
MisterBill2
- Joined Jan 23, 2018
- 27,563
Actually, this is still a wiring diagram, but it is a very well drawn and easy to follow wiring diagram.
To be a very good circuit schematic it would have the pin numbers of the IC connections outside the box, and the functional descriptors, like in post #22, on the inside of the box, next to the pin they are describing.
It does not matter so much in a simple circuit like this one, but when it is a schematic with ten or 20 ICs and lots of other devices it becomes important for being able to follow what is going on.
You guys are heroes, thank you!
Hi, I just tested it. It didn't work but I imagine it's something I did wrong.
I'm going to upload a video of my breadboard as soon as I can (My phone died), the wiring isn't the neatest but you should be able to see what I'm dealing with and get a general idea of how I wired it and see if there are any obvious mistakes. The Variable resistor fried itself so that is a clue as to what is going wrong. I will link where I bought the variable resistor in this post.
Variable Resistor:
https://www.amazon.co.uk/gp/product/B0734N8CMJ/ref=ppx_yo_dt_b_asin_title_o00_s02?ie=U
Yes there is something definitely wrong in the wiring if that happened.
Try and get as much detail and definition in the photos
Please let me know if there are any issues with the link provided, thank you. Also note I use a push button as a toggle switch just by holding the button down when I want the current to flow
Video Link:
https://drive.google.com/file/d/1-x5Tu1_v5r19ItEZEiT8ERFOO0b2kIrM/view?usp=sharing
Last edited:
Okay sorry, I will fix it
Audioguru again
- Joined Oct 21, 2019
- 6,826
The video might be shown on You Tube by somebody who knows nothing about electronics like many videos there.
The circuit posted here is completely wrong. Instead of seeing a video that has many errors, why not look at the datasheet of an LM555 or of an NE555 from the manufacturer like this:
The circuit posted here is completely wrong. Instead of seeing a video that has many errors, why not look at the datasheet of an LM555 or of an NE555 from the manufacturer like this:
Attachments
Have mercy on my wiring and cameraman-ship
Audioguru again
- Joined Oct 21, 2019
- 6,826
The mess of wires all over the place on a breadboard is not a tidy and detailed schematic.
The pins on the 555 are not numbered so I needed to guess which end was which.
The + wire of the capacitor is not seen.
Pin 7 of the 555 is not connected to a missing resistor and the potentiometer.
The pins on the 555 are not numbered so I needed to guess which end was which.
The + wire of the capacitor is not seen.
Pin 7 of the 555 is not connected to a missing resistor and the potentiometer.
I'm following Sghito's Wiring diagram. It does not use pin 7. I already apologised for the amateur setup. It's easy enough to conclude the 555 Timer pins when you cross reference it with Sghito's Wiring diagram.
Audioguru again
- Joined Oct 21, 2019
- 6,826
Sghito made a schematic of your WRONG wiring diagram.
I showed it in post #33 beside a CORRECT schematic from the datasheet.
Pin 7 is used to discharge the timing capacitor that is supposed to be connected to ground (yours is wrongly connected to Vcc) through the missing resistor that should be connected between pin 7 and pin 8.
I showed it in post #33 beside a CORRECT schematic from the datasheet.
Pin 7 is used to discharge the timing capacitor that is supposed to be connected to ground (yours is wrongly connected to Vcc) through the missing resistor that should be connected between pin 7 and pin 8.
Okay, the Correct schematic you showed is not actually helpful to me at all because I’m a novice and it’s not using the same components as me. It doesn’t include a variable resistor. Can you please show me how to wire it correctly keeping in mind that if you tell me to replace a given resistor with a variable resistor that I will get confused because a variable resistor has three pins and a regular resistor has two. Also I don’t know what value resistors to use, I don’t know the equation and if I’m honest I’d prefer someone just tell me what resistor to use. For the resistors that aren’t variable
