EEVblog® Electronics Community Forum

Electronics => Projects, Designs, and Technical Stuff => Topic started by: stern0m1 on February 13, 2020, 09:24:24 pm

Title: PT2262 RF ENCODER
Post by: stern0m1 on February 13, 2020, 09:24:24 pm
Is there something similar to the PT2262 Encoder that the address bits are randomly set by the manufacturer of the chip? Requiring no programming
http://www.princeton.com.tw/Portals/0/Product/PT2262_5.pdf (http://www.princeton.com.tw/Portals/0/Product/PT2262_5.pdf)

Thanks!
Title: Re: PT2262 RF ENCODER
Post by: floobydust on February 13, 2020, 10:55:47 pm
One alternative is PT2272 (http://www.princeton.com.tw/Portals/0/Product/PT2272.pdf) or Holtek HT12E or EV1527 (learning code) or Holtek HT6P20. (https://www.holtek.com/productdetail/-/vg/6P20)
Most of the new tech IC's are code-learning.  That PT2262 IC is low security because it uses fixed code and vulnerable to copycat attacks.
Linx (https://linxtechnologies.com/wp/product) sells the complete remotes, receivers, IC's too from Digikey.
Title: Re: PT2262 RF ENCODER
Post by: stern0m1 on February 13, 2020, 11:37:47 pm
Thank you for the information.

All of these require, in one shape or another setting the "address". No one makes an encoder with an option for the "address" to be just randomly set by the ic manufacturer?
Title: Re: PT2262 RF ENCODER
Post by: floobydust on February 14, 2020, 01:05:02 am
EV1527 (http://www.sc-tech.cn/en/1527en.htm) has a factory 20-bit address (1,048,576) pre-programmed I think. It's just a button press on the receiver to learn and accept this. This IC part is in many eBay little remote boards.
Title: Re: PT2262 RF ENCODER
Post by: stern0m1 on February 14, 2020, 09:56:48 am
Which chip is used to decode ev1527?
Thanks
Title: Re: PT2262 RF ENCODER
Post by: ebclr on February 14, 2020, 06:51:56 pm
http://www.sc-tech.cn/en/2272en.htm (http://www.sc-tech.cn/en/2272en.htm)
Title: Re: PT2262 RF ENCODER
Post by: stern0m1 on February 14, 2020, 10:07:48 pm
How do you set it to" learn"  the preprogrammed address in the 1527?
The datasheets are not really clear.
Thanks