[Coco] CoCo Cassette Relay (Remote)

[Chad H]

That is correct, the relay is definitely Double Throw, but only Single Pole.


 

The underside of the relay is 5 pins  (rough diagram is this)..

 

            1           2     3

            4                 5

 

Pins 4 & 5 are the Coil points  (Supply 5 volts DC across these and it

latches)

 

Pins 1 & 3 are Normally closed  (not used)

 

Pins 1 & 2 are Normally open  (Open circuit leaves cassette motor off) These
are bridged when the 5V latches the relay and causes the motor to run.

This can also be shown by bridging the first and list pin of a cassette
cable while its unplugged from the back of the CoCo, same thing.

 

From: Tony Cappellini [mailto:cappy2112 at gmail.com] 
Sent: Sunday, October 20, 2013 10:56 AM
To: CoCoList for Color Computer Enthusiasts
Cc: chadbh74 at hotmail.com
Subject: Re: CoCo Cassette Relay (Remote)

 


>>That relay is IIRC a dpdt, but could be a spdt.  If dpdt, clean the other


I have to disagree with this.

There aren't enough leads on the relay in the picture that was posted, to be
a dpdt.

 

A dpdt relay would require 6 leads for the switch contacts,and two for the
coil.

 

There are only 5 leads visible, so that would indicate SPDT