29 Aug
2002
29 Aug
'02
3:51 a.m.
No, the remote that came with a TV my grandmother had (mid 1960's) had
only 2 buttons. I think it worked either by the clicking, or a static
pulse. All it did was select channels up & down.
Sellam Ismail wrote:
On Wed, 28 Aug 2002, Tony Duell wrote:
>Some US company (I forget who) made an ultrasonic remote controlled
>valve TV where the remote was essentially tuned metal bars that were
>mechanically hit when the button was pressed. No electronics in the
>handset at all. The receiver in the TV detected one of 4 (or so)
>different frequencies corresponding to the 4 buttons on the remote, and
>then operated a relay to trigger the appropriate function (I think
>channel selection was done using an electromechanical stepping swtich,
>etc).