Guru
Joined: 06/08/2020
Location: United KingdomPosts: 427
| Posted: 04:11pm 06 Nov 2022 |
I have a thing for 1980's "robots" and toys.
I have x2 of these:-
It is controlled via an IR remote. (It also has the capacity to have control sent via a serial port (at the back - which neither of mine have) - that will be phase II for me -- see if I can hack back in the serial control)
x1 has a remote, the other doesn't. So I want to "clone" the working remote. Now the circuit inside the remove is simple - a diode and a M58480P chip -- so I could reverse engineer the circuit and build one (assuming I can get the IC) Chip details
But, I can use the PicoMite and IR surely?
I have a 40kHz IR receiver (plus a couple of 38kHz) on order to see if I can read out the codes sent by the working remote. If I cant get this via the PicoMite/IR I will fire up my oscilloscope to see if I can capture the signal / bit pattern directly.
According to the data sheet, the IC uses a 40kHz carrier -- and 6 bit command words.
I think I should be OK to read / decode the existing remote. But the PicoMite manual talks about 38kHz / 12bit for sending IR.
Ok, so the built in "sending" doesn't look like it would work -- so time to roll my own. The datasheet talks about 2msec and 4msec intervals being a "0" and "1" -- so question: Can I modulate an IR diode fast enough to make "0" and "1", with each pulse being 25us << that's the big question I suppose.
Any pointers on making a custom IR control? (Or can you buy remotes that just clone existing ones?)
Cheers
Nim