Push Button Start with Passive Device Key wanted

[derekf]

That looks pretty cool. Details on how they work are on http://www.mastersentryseries.com/st...overview.shtml

[matty b]

im working on the pushbutton start part of it at the moment. I found out that I screwed up building the circuit that I posted up a little bit up the page in a pdf. Between that portion and the wireless part you end up with a full functioning one button ignition switch for literally pennies on the dollar along with the abilty to also setup keyless entry without using a fob. Hell you could set up the relay to unlock your doors when you walk up and lock when you walk away. Totally brainless operation that doesnt require anything except for the fob in your pocket.

[Tom 72RS/SS]

I would definately be interested in that, keep us posted.

[matty b]

just so happens I was going over the circuit I built and what I thought was a mess up on my part ended up being a crappy switch. Im going to hook up another switch at work tomorrow and if it works properly Ill let you guys know about how well it works, pretty cool stuff and raw parts costs bout 60 bucks but it does take some time to put it together, took me about 3 hours. Hell if it works good maybe I can have a pcb fabricator in town make some printed circuit boards and go from there as far as making a product of some sort.

[ZoomieFoosh]

While we are digging into this push-button start thing, I figure I'd see if anyone knew a solution for this. I want to use one of those Bulgin-type, vandal-resistant switches for my start button. The LED is a 3.3V, so I'd have to put a 470 ohm resister on it to run it with the 12v car system. The only problem is that the switches are rated at 50mA, 24V. I know I'll have to hook it up to a relay, but don't you need at least 200mA-ish to even use one?? Basically, does this mean I'll fry my switch if I try to use it how I want to?

[matty b]

no it works without a resistor at least it does used with the watson setup

[ZoomieFoosh]

They use a completely different switch than the ones I'm interested in.

[jlmccuan]

I set mine up using the Honda switch, an RFID alarm, central lock, and a few relays. The RFID unlocks the doors and powers up the Engine Start button as you approach. One press and release of the Start button powers up the accessories. Second press shuts them off. If you press and hold the Start button (I use a 4 second delay, it is easy to change) the starter engages. The second press and release kills the engine, or if I walk away, the engine shuts off and the door locks engage.

[Jimmy Sean]

I set mine up using the Honda switch, an RFID alarm, central lock, and a few relays. The RFID unlocks the doors and powers up the Engine Start button as you approach. One press and release of the Start button powers up the accessories. Second press shuts them off. If you press and hold the Start button (I use a 4 second delay, it is easy to change) the starter engages. The second press and release kills the engine, or if I walk away, the engine shuts off and the door locks engage.

Do you have a schematic and parts list that you can share with us?

[matty b]

I set mine up using the Honda switch, an RFID alarm, central lock, and a few relays. The RFID unlocks the doors and powers up the Engine Start button as you approach. One press and release of the Start button powers up the accessories. Second press shuts them off. If you press and hold the Start button (I use a 4 second delay, it is easy to change) the starter engages. The second press and release kills the engine, or if I walk away, the engine shuts off and the door locks engage.

what are you using to do the switching for the ignition switch? I havent come across a setup like you are describing but I would really like to know what you used.

[jlmccuan]

Everything is switched by the Honda Engine Start button via relays. The first pulse from the switch turns power on to the MSD, fuel pump, etc, as well as powering up the relay which supplies the accessory circuits (stereo and so on). The second pulse shuts everything back off. The only way the starter gets power is the RFID is present and the Engine Start switch is kept depressed for the time delay setting. The starter shuts off when the switch is released.

I'll get the schematic drawn and posted in the next few days and some pics of the components used.

[matty b]

so the button does it all by itself? I coulda sworn that the button was nothing more than a momentary switch... what year and make honda is this out of? I can look at any OEM schematic at the shop for cars made for the US market so if this is out of an S2000 or something like that lemme know.

[matty b]

ok i looked over the S2000 switch and it is a momentary switch so I dont see how you are just hooking up a relay for ignition and the starter to this button and getting the switch to do what youre saying they do. There isnt any logic in the switch so I dont see how you are getting it to work. And just so I dont sound like an ass Im under the assumption that you say that the honda switch turns on the ignition with one push and if you hold it for a few seconds it engages the starter. press it again and turns off the car. If youre saying that the S2000 switch is doing that I call BS

[viper11]

hi
what brand and model# is the rfid alarm
thanks jason

[jlmccuan]

The switch is just a momentary contact with a light. The relays provide the logic of the functions of on, off, and start. The RFID alarm sends power to the relays, unlocks the doors and turns on the interior lights when the fob is within range(about 30 feet). The central locking sends the lock/unlock signal to the door lock actuators.

Here is the schematic for using a momentary switch to provide a latched on or off condition. All I did was put a DEI28T time relay into it to provide a 12VDC signal to the starter solenoid after an adjustable delay.



I got the Honda S2000 Engine Start Button from http://www.autopartspeople.com/ for $39.78




I just used a cheap Ebay RFID alarm.


I think it was $75

I bought the relays, Bosch 30/40 Amp SPDT for less than $2 each with sockets.

The DEI relay was well under $25 for 2

The Central Lock was from Autotoys.com

[jlmccuan]

To add to the above post, I did it in modules individually. I started with the relay logic and got that working. ( I laid it all out on my pool table ) Once I had the relays set up to turn the 12VDC output on and off with sequential pushes of the Start button, I laid out the RFID and got it set up so that it sent the lock and unlock pulses. Then I used the alarm leads that power up the park lights when the system is disarmed to power up the start logic relays. I added a few other functions (such as a solenoid valve on my Accusump to preoil the engine before starting) and put everything in project cases so they are easier to troubleshoot once installed, then transferred everything from the pool table to the car.

[matty b]

ok that makes alot more sense dude. Thanks for posting it up that is quite easy to do. Good job I think we have a winner

[perry mitchell]

ok i looked over the S2000 switch and it is a momentary switch so I dont see how you are just hooking up a relay for ignition and the starter to this button and getting the switch to do what youre saying they do. There isnt any logic in the switch so I dont see how you are getting it to work. And just so I dont sound like an ass Im under the assumption that you say that the honda switch turns on the ignition with one push and if you hold it for a few seconds it engages the starter. press it again and turns off the car. If youre saying that the S2000 switch is doing that I call BS

So next time, before you call BS, why don't you give the guy a chance to explain. He said he was going to post a schematic but the way you jumped on him, I'm surprised he responded at all. I don't think I would have.

[MrQuick]

The switch is just a momentary contact with a light. The relays provide the logic of the functions of on, off, and start. The RFID alarm sends power to the relays, unlocks the doors and turns on the interior lights when the fob is within range(about 30 feet). The central locking sends the lock/unlock signal to the door lock actuators.

Here is the schematic for using a momentary switch to provide a latched on or off condition. All I did was put a DEI28T time relay into it to provide a 12VDC signal to the starter solenoid after an adjustable delay.



I got the Honda S2000 Engine Start Button from http://www.autopartspeople.com/ for $39.78


The DEI relay was well under $25 for 2

The Central Lock was from Autotoys.com

Thanks for the info JLM, but just to clairify, whic .h relay pictured is the DEI relay? #1 #2 #3 #4

Nice work

[jlmccuan]

That pic doesn't have the DEI relay in it. While the circuit works fine as it is, the light in the Engine Start switch stays lit all the time. I am redoing it so that the light goes off when the alarm is active. I'll have to set it up to control the start solenoid by a positive rather than negative pulse. It works fine as it is, but I'd really like to nail it 100%. Should be able to post the complete schematic this weekend. Functionally, the only difference will be that when the car is both turned off and locked, the Start button light will go out.

BTW, no offense taken. I can't count the number of guys on the 'net saying they have this working, but they all have a key you turn or another switch to flip to make it work.

My goal is to end up with a small disc on the back of my watch to ID me to the car and enable the Engine Start button. All I have to do is wear the watch, hit the button to start and get out and walk away to shut it down and lock it up. It's close now, I just need that light to go out.