Hello to all you guys!
pa3exv nice job.
Is it possible to get original files, not jpegs, to build those transponders and try them with Payalneg's decoder?

Just my development clone of mrt transponder. Works with mylaps rc4. Size 19x21mm. http://cs608521.vk.me/v608521346/38a5/ns1UaQkx4M4.jpg

Awesome work Paypalneg! I've been working on an alternate input amplifier for my decoder, to be used with a loop that has a 470R resistor. More news in the decoder thread if I have success (it is very nearly done).

Yeap,
http://cs14102.vk.me/c617617/v617617...WSGsl61vTo.jpg
and two amplifiers with filters in decoder. This box is compatable with amb decoder :rolleyes:

Do you have a schematic? I can see a custom wound balun and I assume the capacitors are for filtering, but I don't see any amplification?

What sort of signal level do you get from yours? And how do you amplify it afterward? I am simply using opamps and a comparator now to turn the signal back into a digital pulse train.

My first attempt was a custom winding on a binocular core, this worked OK but wasn't amazing:

http://i.imgur.com/4YFqzbk.jpg

The newest one works much better and uses a Mini-Circuits transformer as a balun:

http://i.imgur.com/0nOnqX0.jpg

Unfortunately with a 470R resistor in the loop the second one is targeted at a 52R impedance system (the balun is 1:9) but that doesn't matter as I'm not attempting compatibility with AMB.

Bingo!

This is exactly what is needed a decoder compatible with AMB & MRT transponders.

If a less expensive decoder was available and with compatible transponders then that would make switch over easier for track owners.

So you say to have tested with amb then you mean rc2 & rc3 not the new my lalps rc4?

Compatible devices for the decoder are in the decoder thread, in this post of the decoder specs:

http://www.rctech.net/forum/12222187-post251.html

It's not the howard design?
you use an attiny25 and 20MHz oscillator ?
only 2 layers ?

attiny25 with 20mhz crystal and 4 layers pcb.

Does your transponder work with RC4 decoder?

Any chance you share your design with us?

There are some great work done on this forum ;)

Regards.

ok thanks, but it's not the same design like this link ?

http://www.rctech.net/forum/radio-el...ansponder.html

thanks.

Its works with rc4 decoder. Sorry, no design.

Great job !
Can you share schematic ?

I would love to build my own mylaps hybrid compatible transponder ... is there a kit available?

+1