24v dc scooter...

[Matthew Jones]

They might work. I know transistor can work but takes alot time to find the right resistance. What would normally expected in resistance does not work.

SCR's might not be prone to the same thing as transistors. I haven't ever tried them

Relays are easy. They are good for getting feet wet.

Jbignes5
The data sheet says 25ms operate & 20 ms release time. Thats the best ones I could find. Since there were none available locally then these will have to do. Unless you have another alternative?

Thats fast enough. I was checking cause alot of relays are slow but they don't tell you that up front.

Matt

[Jbignes5]

Well we will have to see.

I hope they send them out I don't know if they will send them to me. They should but who knows about some suppliers. Good to hear they are about right. I'll have to wait on the batteries till monday since the place was closed on the weekends. ARG!

[Matthew Jones]

Most people are just trying to make an honest buck.

Matt

[Jbignes5]

I hear you.

Yeah well lets just see what happens. Ok today I took the scooter out for a ride and I think that this area NY these are not legal to operate. I havent been pulled over yet but I think I'm gonna have a hard time. I think before I go that route I might go down to city hall and see if we can work something out. I mean at some point they have to capitulate that these are no different then a bicycle. But I'll have to check. I don't want my project getting nipped in the bud because they had legal reason to. It's funny but california these things are legal and even florida yet NY it isn't. I don't understand that.
But anyways i was thinking i will have to upgrade from 250 watt to 500 watt. I am just at the upper of the weight limit and it stresses to get going on a slight slope. It did run ok but I think it needs a little more power for my fat butt lol. Other then that it runs fine. I traveled from my house to my brothers a little over a mile away and back. It was getting a little spongy though at the end so the switch should even things out more. going with 500 watts also will lower the range to 5 miles or so. Hopefully the switch will add more to that.

[Matthew Jones]

We'll get ya going. Later you can strap a one horsepower to it and it'll tote your fat ass fine. Or better you can five horse real cheap.
Black & Decker Outdoor | Cordless Mower

You can find them on ebay real cheap, with dead batteries. Usually around 150 - 200. Thats good price for 5hp dc motor. The motor is great on tesla switch. I have one I am putting on a cart I wanna build.
build your own four wheel bike or pedal car, plans and kits

I am gonna use it to get the mail from my mail box. LOL

Cheers
Matt

[Jbignes5]

Sounds good but.

Well it seems I might have a tough go at getting it accepted on the road like a bike. I wrote an email to my mayor asking why they have been banned. As for the engine I think a 500 will do for now. but maybe later ill get er up there lol.
Well I'll have to see how it goes with our lame duck mayor. Catcha oh and they shipped the relays so i'm good..

[Jbignes5]

Today!

Everything should be here today and the fun begins!

I wanted to know if there was a way to do a fuel guage and speedometer setup for this scooter as well. The fuel guage would be the most important!

Edit: I got everything now. Gonna start assembly and testing.

Question:
Mathew my small coil that works with the relay to resonate is heating up. Should i use heavier wire?

ok upon rewinding the coil with larger wire it doesn't heat up as much but it still gets hot. It also works better now as well. I dont have to get the magnet as close to the reed switch for it to activate and i can now move the magent to adjust the speed of the actuating relay. there has to be a more efficient way to do the timing for the switch speed. It would be best for less current used to make the setup more effiecient. But that part is working atm now onto the the main switches and diodes. Weee...

[Matthew Jones]

A little better way

Dual Transistor Multivibrator Circuit


This is a little better way to drive the relays. It works. I am testing right now.

The only things you need to change are.

Lower the 100k of resistance to 20k, use 1/2 watt or bigger.

Replace the 680r, and LED with a relay.

IF you run it with the relay replaced you'll see how they can drive it.

Matt

[Jbignes5]

Hmmm...

Is there a way to chop that in half and i know this will be a 12v system also I need to have a way to change the speed of the on off sequence. Maybe an variable resister.

[Matthew Jones]

I don't know what you mean by "Chop in Half".

You can use a variable. But the speed of the switching is not dependant solely on the resistor (As best I can tell). Just changing the resistance may just give you a different duty cycle. You want as close to 50% duty cycle as you can get.

If you build like I outlined I think you'll be switching at or around 400 hz. So thats pretty fast for starters. It will do the trick for sure.


Matt

[Jbignes5]

Welp..

Most of it is wired up just got to integrate the timing section into the current design.
Mathew does this run all the time or is there an off switch for it?

[Matthew Jones]

Just depends on the way you want to wire it. As is I think it will run continues, but you should put an on off switch at the bridge and p-roably a double pole at the ground wires. You'll have to see what workis for you.

Seem I added a double pole somwhere.

Matt