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Sent: Wednesday, July 23, 2025 4:10 AM
Subject: BFT - libra gate - Hello!

 

First of all I would like to congratulate you on your site and the information about the BFT Libra.

It's very interesting and useful.  I found really great your work ("revers engineering") of the schematic circuit.

 

I studied electronic in my high school and college, but in my job i don't work with it unfortunately. So electronic is my hobby and i practise when something is broken.

 

Your work on Libra is very very good and I happy you have pubblic it. Congratulation again.

 

We use 2 Bft Libra in our gates. In 2021 in one and a month ago in the other the remote receiver was broken and I replace it.

 

I removed the receiver, inserted e SIP socket, bought e superetherodina receiver 

(https://it.aliexpress.com/item/33038939617.html?spm=a2g0o.order_list.order_list_main.474.922e3696PxCb6L&gatewayAdapt=glo2ita)  for few money and with an inverted npn adjust the out to the right phase.

 

I attach some materials (pictures, schematics and link) so if you want update and upgrade your site, feel you free to use it as you think.

 

Your assumptions about the circuit of limitwitch are right. See attached limitswitch circuit, 2 diodes and 1k resistor.

 

Now I'm going to prototype a circuit to replace the “motherboard” using an Arduino shield... we'll see if it works.

 

Best regards 

Matteo

Italy