Hi,

I have just brought a generator that has a "remote start" it looks like a simple "on / off" remote, with a metal aerial.

It has a serial number on the back.

I am not an electrical wizard, but, this forum looks very knowledgable.

How can I:

1. Buy a spare remote (it looks quite old!?)
2. I presume I need to know the frequency?

many thanks

 

There are quite a few that look like that on ebay. You would need to check the frequency - it may be written on either the transmitter or receiver.
http://www.ebay.co.uk/itm/DC-12V-1C...hash=item489d4f8131:m:mybtD5QwSRzXbtqYwCGdypA

 

I saw those things on Aliexpress,
Yes there is a frequency number that needs to match.
What is used on the receiver side ?

You might need to figure out the frequency though.

 

Hi,

Many thanks for the replies. I have taken apart the remote (wow, they are cheaply made!)

The front:

it clearly says "401 -4" what is this?
I also see writting on the chip attached to the aerial; PT2264


The back:

I can read with my eye the very small numbers printed on the ciricuits, but, I don't think this is the frequency, my phone camera cannot capture this small detail.

 

Hi,

On the "round oscillator" (like a 5 pence) i can read:

JDQ
R315A

Is this something to do with the frequency?

cheers

 

JDQ
R315A

Yep, it's 315MHz.

 

The PT2264 is an encoder. It takes up to 4 data bits as inputs and combines them with up to 12 address input pins with 3 possible values for each one (high, low, and floating). Your unit has 4 of the address inputs floating, 4 connected in a 1011 or 0100 pattern with solder bridges, and only two of the four switches populated. If you can find a source for the chip, you can clone the unit. Of course, it will be less costly to replace the transmitter and receiver with ebay modules, but you'll have to get into the generator control wiring.

ak

 

May be you can bypass the genset start and mod it to use a Rx and Tx of the similar type that is suggested

 

The PT2264 is an encoder. It takes up to 4 data bits as inputs and combines them with up to 12 address input pins with 3 possible values for each one (high, low, and floating). Your unit has 4 of the address inputs floating, 4 connected in a 1011 or 0100 pattern with solder bridges, and only two of the four switches populated. If you can find a source for the chip, you can clone the unit. Of course, it will be less costly to replace the transmitter and receiver with ebay modules, but you'll have to get into the generator control wiring.

ak

Thank you so much - so far I understand it's 315 mhz and it's encoded. I have just brought another remote that "clones" key fobs; i presume this would not work as the PT2264 will keep changing the data bits?

I really need to have a look at the control wiring / radio receiver.

thanks for this - finding this very interesting

 

the PT2264 will keep changing the data bits?

No, this chip sends the same code each time but by changing the links around the chip you can select which codes it sends and this must match the receiver.

Can you see which decoder chip the receiver uses?

 

Hi Simon,

This site has pictures of the inside of the fob that you found and they look very similar. There are also links to descriptions of the encoder and decoder chips. They work as AlbertHall described. I'm planning to use them in a project. The site I mentioned gets confused between 315 and 433 Mhz (Europe). You need to make sure you get one that operates at 315MHz.

Good luck,

Peter