Help,trying 2 Make a 1 channel radio(transmitter&receiver)basically from scratch, range 3 feet only

Thread Starter

Glenjamin

Joined Jul 23, 2018
3
Help, need to Make a one channel radio(transmitter&receiver) basically from scratch but that only has a 3 foot range, no more.
Even just learning how to make a near communication(like a fob) device with a three foot range(no greater) would work. Thanks in advance
P.s.
I’m Trying to invent something. Whomever helps and I actually implement their instructions I’ll make sure to remember them and pay them back.
 

DickCappels

Joined Aug 21, 2008
6,640
You can buy a 433 MHz transmitter & receiver set for less than $1.00, and they work pretty well.
upload_2018-7-23_14-5-12.png
https://www.ebay.com/sch/i.html?_fr..._TitleDesc=0&_osacat=0&_odkw=432+mhz&LH_BIN=1


But if you really want to do something from scratch just to prove to yourself that you can try this. In this case, drive the transmitter with an LMC555C instead of the microcontroller in the transmitter and omit the decoding microcontroller on the reciver if you want.
http://cappels.org/dproj/LCRFLINK/LCRFLINK.htm
 

Thread Starter

Glenjamin

Joined Jul 23, 2018
3
You can buy a 433 MHz transmitter & receiver set for less than $1.00, and they work pretty well.
View attachment 156738
https://www.ebay.com/sch/i.html?_fr..._TitleDesc=0&_osacat=0&_odkw=432+mhz&LH_BIN=1


But if you really want to do something from scratch just to prove to yourself that you can try this. In this case, drive the transmitter with an LMC555C instead of the microcontroller in the transmitter and omit the decoding microcontroller on the reciver if you want.
http://cappels.org/dproj/LCRFLINK/LCRFLINK.htm
DickCappels, thank you. I’m going to get to it with these, it’s just about familiarizing myself with this stuff. Thank you, I’ll keep you posted.

MOD EDIT: Deleted duplicate quote.
 
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