I used to repair pinball machines where I had to analyze a complex ladder diagram to figure out which contact was at fault. Often only a wiring diagram was available and I had to develop my own logic chart from it. I didn't know at that time they were called ladder diagrams, but since I had studied Boolean algebra they weren't too difficult. It is amazing the level of complexity that can be achieved with 8 relays and 6 switches. Mike (o\!/o)
It's sad that not much runs on ladder logic any more (damned PLCs) but they are a really simple way to get a lot of automation bang for your buck. I have seen loads of arduino projects online that could have been done in a bullet proof relay board. Do you still work on pinball machines, I have always wanted to get my hands on one eventually.
I haven't in a long time. When the home video games came along in the 80s the arcade machines went solid state, just a box with a computer and monitor inside. Not much to go wrong except some like Galaxian and Centipede had heat problems. Later model pinballs used sealed relays and switches which solved a lot of the problems that the open unit systems had like dust and corrosion. I don't know if any of the remaining arcades use the old electro-mechanical machines. Too much power, too much maintenance so they are just collectors items now. I believe most just went to the scrapyard. I know of several in homes that don't work and will probably just remain as decor, even as hard as I tried to tell them they can (and should) be fixed. Mike (o\!/o)
Shame that they are just sitting. I have a bunch of test equipment from the 40's through to the 70's and it doesn't get out much but I do still use it when I need it. BTW, did you ever see the fully electro-mechanical version of pong? The ball was on a big x-y gantry and the paddles were on a pulley system, I think it ran a couple kW but I would kill to play with it.
One guy has 4 from the 50s and 60s and he only wants the lights to come on when he has people over, he doesn't want them to work as someone might want to play them. Some people have more money than brains it seems. I would love to play that Pong! And I would love to dissect, I mean inspect, the guts of some machines like that. vimeo.com/7548051 I once repaired a manual Pong-like bar table from the 50s. The play field was under glass and slanted each way slightly from the center with the paddles on a pulley system controlled with knobs that had a button on top to kick the ball. It took a lot of coordination to get the ball to go where you want it to. The only electrics were for scoring, lights and a tilt switch. In the ball return from each end was a switch that operated a counter for each player and lights flash three times for each score. 10¢ and first to five wins. I haven't thought about these machines for years. Some good memories there. Some frustrations, too. I think the bar table would be a good project for someone. Maybe someday... Mike (o\!/o)
Yeah, I like the minimal controls idea. A smooth curved table (or maybe a rubber sheet with variable geometry) could give it multiple levels of skill. I have a laundry list of projects as well, there isn't enough time to do everything :/
how r Normally open switch at rang 2 is gonna closed by push button in rang 1 ? in latching relay. Even though we are not gonna energies normally open switch so how push button energies it even push button at rang 1 ?
+karl ramberg Jim is right, the contacts named R1 are associated with the coil R1. In a large project there are many coils and contacts, using names like R1 and R2 is how you know which contacts will open or close when a given coil gets power.
my final year project is automatic load sharing and source selection based on load using PLC and scada please guide me how the ladder diagram is drawn?????
Small problem with your first ladder diagram. The symbols are completely wrong. That's not how a coil is shown. That is not contacts. Those are not light bulbs. A coil is represented as a series of four little hills like half of a sine wave. That symbol with the two lines is a capacitor. When you cross it, it indicates that the capacitor is discharging. A bulb is shown most often as a diode emitting light, ie an LED. Further, the contacts associated with the coil are shown as small open circles at the ends of lines the lead away from the relay or switch. The normally open contact will be away from the arrow between the two contacts. The normally closed contact will be touching the arrow. You also completely missed how logic gates work.
This idiot has NO CLUE what the components actually look like in a schematic. These symbols are used in BLOCK DIAGRAMS, not schematics and definitely not a ladder diagram.
Best explanation out of all the videos I've watched so far...was getting worried that i wasn't able to grasp onto the concept. Thank you!
This is really neat! I had no idea this sort of control circuitry could be built with relays and switches. Looking forward to more :D
+chawkzero It is surprisingly simple to design controls this way and it works for nearly anything from 1v up to 600v!
@@NickMoore 0
Very good explanation, easy to understand thank you
Great. You can also use arrows to represent current flow instead of colors
Amazing, thank you very much!
Thanks very helpful, subscribed! Any more PLC help relay logic, ladder logic appreciated!
That's was informative ⚡🔥
Great explanation.
This is nice for old machines
Great video
This is super clear and easy to understand. Thank you very much!
Good job m8
Very good instructional video. Will be using it in my training. Thanks!
Great explanation
Շնորհակալություն լավ բացատրելու համար :) thumbs up!
Good presentation
Great deathless
It requires quit more details like while Rung 1 is activated, how rung 3 is recieving supply by activating Coil.
Good. thank you
Thank you
Great
How can you do xor for more than 2 relays. Is that even possible?. Would need to be able to do it for 10. But seems impossible.
I used to repair pinball machines where I had to analyze a complex ladder diagram to figure out which contact was at fault. Often only a wiring diagram was available and I had to develop my own logic chart from it. I didn't know at that time they were called ladder diagrams, but since I had studied Boolean algebra they weren't too difficult. It is amazing the level of complexity that can be achieved with 8 relays and 6 switches.
Mike (o\!/o)
It's sad that not much runs on ladder logic any more (damned PLCs) but they are a really simple way to get a lot of automation bang for your buck. I have seen loads of arduino projects online that could have been done in a bullet proof relay board.
Do you still work on pinball machines, I have always wanted to get my hands on one eventually.
I haven't in a long time. When the home video games came along in the 80s the arcade machines went solid state, just a box with a computer and monitor inside. Not much to go wrong except some like Galaxian and Centipede had heat problems.
Later model pinballs used sealed relays and switches which solved a lot of the problems that the open unit systems had like dust and corrosion. I don't know if any of the remaining arcades use the old electro-mechanical machines. Too much power, too much maintenance so they are just collectors items now. I believe most just went to the scrapyard. I know of several in homes that don't work and will probably just remain as decor, even as hard as I tried to tell them they can (and should) be fixed.
Mike (o\!/o)
Shame that they are just sitting. I have a bunch of test equipment from the 40's through to the 70's and it doesn't get out much but I do still use it when I need it.
BTW, did you ever see the fully electro-mechanical version of pong? The ball was on a big x-y gantry and the paddles were on a pulley system, I think it ran a couple kW but I would kill to play with it.
One guy has 4 from the 50s and 60s and he only wants the lights to come on when he has people over, he doesn't want them to work as someone might want to play them. Some people have more money than brains it seems.
I would love to play that Pong! And I would love to dissect, I mean inspect, the guts of some machines like that.
vimeo.com/7548051
I once repaired a manual Pong-like bar table from the 50s. The play field was under glass and slanted each way slightly from the center with the paddles on a pulley system controlled with knobs that had a button on top to kick the ball. It took a lot of coordination to get the ball to go where you want it to. The only electrics were for scoring, lights and a tilt switch. In the ball return from each end was a switch that operated a counter for each player and lights flash three times for each score. 10¢ and first to five wins.
I haven't thought about these machines for years. Some good memories there. Some frustrations, too.
I think the bar table would be a good project for someone. Maybe someday...
Mike (o\!/o)
Yeah, I like the minimal controls idea. A smooth curved table (or maybe a rubber sheet with variable geometry) could give it multiple levels of skill.
I have a laundry list of projects as well, there isn't enough time to do everything :/
What application can draw like this?
how r Normally open switch at rang 2 is gonna closed by push button in rang 1 ? in latching relay. Even though we are not gonna energies normally open switch so how push button energies it even push button at rang 1 ?
good
❤️
Why is everything called R1 ? It makes it extra confusing. Is it that a relay is all of those things combined ?
Because the contacts are "part of" the coil, and are controlled by the coil.j
+karl ramberg Jim is right, the contacts named R1 are associated with the coil R1. In a large project there are many coils and contacts, using names like R1 and R2 is how you know which contacts will open or close when a given coil gets power.
Ok, thanks
nice video
#industrialautomationknowledgebank
How can i customize a contactor in order to get a logic gate?
my final year project is automatic load sharing and source selection based on load using PLC and scada please guide me how the ladder diagram is drawn?????
Great Project!!
is that not the symbol for a cap? someone enlighten me
In electronic drawings it's a cap, in ladder logic it's a pair of relay contacts.
@@NickMoore thank you
Relay buffer gate video here...th-cam.com/video/6lluB1ww_Rg/w-d-xo.html
It really doesn't help that you named like 3 things R1
Those are all the same device. A relay has a coil and multiple sets of contacts.
Small problem with your first ladder diagram. The symbols are completely wrong. That's not how a coil is shown. That is not contacts. Those are not light bulbs. A coil is represented as a series of four little hills like half of a sine wave. That symbol with the two lines is a capacitor. When you cross it, it indicates that the capacitor is discharging. A bulb is shown most often as a diode emitting light, ie an LED. Further, the contacts associated with the coil are shown as small open circles at the ends of lines the lead away from the relay or switch. The normally open contact will be away from the arrow between the two contacts. The normally closed contact will be touching the arrow. You also completely missed how logic gates work.
You are thinking of ELECTRONIC symbols. Look up "Ladder Diagrams".
@@NickMoore Hahaha! He's all thinking electronics.
Are you slow? Do you even know what a capacitor is? And why is EVERY component labeled R1?
This idiot has NO CLUE what the components actually look like in a schematic. These symbols are used in BLOCK DIAGRAMS, not schematics and definitely not a ladder diagram.
i will have to watch this a dozen times in order to understand it