[BBC-Micro] bbc-micro Digest, Vol 82, Issue 6

Anthony Brett Davies anthonbd at hotmail.com
Fri Jul 19 12:38:10 BST 2013


Sorry you were right. After opening up my issue 6 electron, there is as was stated a nice little cassette relay in there. My mistake. Oops!!

Sent from my iPhone

On 19 Jul 2013, at 12:00, bbc-micro-request at lists.cloud9.co.uk wrote:

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> Today's Topics:
> 
>   1. Re: bbc-micro Digest, Vol 82, Issue 5 (Anthony Brett Davies)
>   2. Re: bbc-micro Digest, Vol 82, Issue 5 (Wookie)
>   3. Re: bbc-micro Digest, Vol 82, Issue 5 (Chris Johns)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Thu, 18 Jul 2013 12:48:48 +0100
> From: Anthony Brett Davies <anthonbd at hotmail.com>
> Subject: Re: [BBC-Micro] bbc-micro Digest, Vol 82, Issue 5
> To: "bbc-micro at lists.cloud9.co.uk" <bbc-micro at lists.cloud9.co.uk>
> Message-ID: <DUB406-EAS687249EFBA42FFE88522FEDB620 at phx.gbl>
> Content-Type: text/plain; charset="us-ascii"
> 
> Does the electron have a motor relay? Thought the relay was only on the BBC.
> 
> Sent from my iPhone
> 
> On 18 Jul 2013, at 12:00, bbc-micro-request at lists.cloud9.co.uk wrote:
> 
>> Send bbc-micro mailing list submissions to
>>   bbc-micro at lists.cloud9.co.uk
>> 
>> To subscribe or unsubscribe via the World Wide Web, visit
>>   http://lists.cloud9.co.uk/mailman/listinfo/bbc-micro
>> or, via email, send a message with subject or body 'help' to
>>   bbc-micro-request at lists.cloud9.co.uk
>> 
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>> When replying, please edit your Subject line so it is more specific
>> than "Re: Contents of bbc-micro digest..."
>> 
>> 
>> Today's Topics:
>> 
>>  1. Electron - Motor Control Relay (Rich Mellor)
>>  2. Re: Electron - Motor Control Relay (Wookie)
>>  3. Re: Electron - Motor Control Relay (Rich Mellor)
>> 
>> 
>> ----------------------------------------------------------------------
>> 
>> Message: 1
>> Date: Wed, 17 Jul 2013 16:29:21 +0100
>> From: Rich Mellor <rich at rwapservices.co.uk>
>> Subject: [BBC-Micro] Electron - Motor Control Relay
>> To: BBC micro mailing list <bbc-micro at lists.cloud9.co.uk>
>> Message-ID: <51E6B851.30600 at rwapservices.co.uk>
>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>> 
>> Hi,
>> 
>> Does anyone know the specifications for the motor control relay in the 
>> Electron?  Is it just a 5V mini relay?
>> 
>> I have an Electron here where the motor control is not working - there 
>> looks to be some damage around one of the relay pins - the cable is 
>> fine, but output is about 200mV (!)
>> 
>> -- 
>> Rich Mellor
>> RWAP Services
>> Specialist Enuuk Auction Programming Services
>> 
>> www.rwapservices.co.uk
>> 
>> 
>> 
>> 
>> 
>> ------------------------------
>> 
>> Message: 2
>> Date: Wed, 17 Jul 2013 21:05:13 +0100
>> From: Wookie <bbcmicro at wooky.plus.com>
>> Subject: Re: [BBC-Micro] Electron - Motor Control Relay
>> To: bbc-micro at lists.cloud9.co.uk
>> Message-ID: <51E6F8F9.3070706 at wooky.plus.com>
>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>> 
>> On 17/07/13 16:29, Rich Mellor wrote:
>>> Hi,
>>> 
>>> Does anyone know the specifications for the motor control relay in the
>>> Electron?  Is it just a 5V mini relay?
>>> 
>>> I have an Electron here where the motor control is not working - there
>>> looks to be some damage around one of the relay pins - the cable is
>>> fine, but output is about 200mV (!)
>> Errr... what output ? the relay should only connect pins 6 & 7 of the 
>> cassette interface together when you do a *motor 1 and it should be open 
>> circuit when you do *motor 0
>> 
>> It might be *motor0 and *motor1 ... it's been a long time.
>> 
>> If the relay is knackered I can open up one of my electrons and get the 
>> spec of the relay for you.
>> 
>> Cheers
>> Wookie
>> -- 
>> The problem with America is stupidity. I'm not saying there should be a 
>> capital punishment for stupidity, but why don't we just take the safety 
>> labels off of everything and let the problem solve itself?
>> 
>> 
>> 
>> ------------------------------
>> 
>> Message: 3
>> Date: Thu, 18 Jul 2013 09:51:36 +0100
>> From: Rich Mellor <rich at rwapservices.co.uk>
>> Subject: Re: [BBC-Micro] Electron - Motor Control Relay
>> To: Wookie <bbcmicro at wooky.plus.com>
>> Cc: bbc-micro at lists.cloud9.co.uk
>> Message-ID: <51E7AC98.3060704 at rwapservices.co.uk>
>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>> 
>> On 17/07/2013 21:05, Wookie wrote:
>>> On 17/07/13 16:29, Rich Mellor wrote:
>>>> Hi,
>>>> 
>>>> Does anyone know the specifications for the motor control relay in the
>>>> Electron?  Is it just a 5V mini relay?
>>>> 
>>>> I have an Electron here where the motor control is not working - there
>>>> looks to be some damage around one of the relay pins - the cable is
>>>> fine, but output is about 200mV (!)
>>> Errr... what output ? the relay should only connect pins 6 & 7 of the
>>> cassette interface together when you do a *motor 1 and it should be open
>>> circuit when you do *motor 0
>>> 
>>> It might be *motor0 and *motor1 ... it's been a long time.
>>> 
>>> If the relay is knackered I can open up one of my electrons and get the
>>> spec of the relay for you.
>>> 
>>> Cheers
>>> Wookie
>> 
>> Hmm - maybe it is the lead then after all, as I have just tried plugging 
>> the lead into the cassette player's remote socket - the motor does not 
>> run when I press PLAY (as expected).
>> 
>> However, even if I join pins 6 and 7 in the DIN plug end together, the 
>> motor still does not run.
>> 
>> 
>> -- 
>> Rich Mellor
>> RWAP Services
>> Specialist Enuuk Auction Programming Services
>> 
>> www.rwapservices.co.uk
>> 
>> 
>> 
>> 
>> 
>> ------------------------------
>> 
>> _______________________________________________
>> bbc-micro mailing list
>> bbc-micro at lists.cloud9.co.uk
>> http://lists.cloud9.co.uk/mailman/listinfo/bbc-micro
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>> 
>> End of bbc-micro Digest, Vol 82, Issue 5
>> ****************************************
> 
> 
> 
> ------------------------------
> 
> Message: 2
> Date: Thu, 18 Jul 2013 18:04:07 +0100
> From: Wookie <bbcmicro at wooky.plus.com>
> Subject: Re: [BBC-Micro] bbc-micro Digest, Vol 82, Issue 5
> To: bbc-micro at lists.cloud9.co.uk
> Message-ID: <51E82007.2070100 at wooky.plus.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> 
> On 18/07/13 12:48, Anthony Brett Davies wrote:
>> Does the electron have a motor relay? Thought the relay was only on the BBC.
> 
> Yes the electron has a motor relay just like the BBC.
> 
> I take it you never wrote...
> 
> 10*MOTOR 1
> 20*MOTOR 0
> 30GOTO10
> 
> It makes an 'orrible sound.
> 
> One of my first hardware things I did was to wire a 6V battery and bike 
> headlight across the cassette relay and then wrote a program to flash it 
> on and off in morse code.
> 
> Then I wired up a light dependant resister across the joystick port on 
> my plus1 and used that electron to read the morse code and show it on 
> the screen.
> 
> I wonder if I still have the tape with the program on ?
> 
> Cheers
> Wookie
> -- 
> The problem with America is stupidity. I'm not saying there should be a 
> capital punishment for stupidity, but why don't we just take the safety 
> labels off of everything and let the problem solve itself?
> 
> 
> 
> ------------------------------
> 
> Message: 3
> Date: Thu, 18 Jul 2013 18:15:04 +0100
> From: Chris Johns <chris at lessthan3.org.uk>
> Subject: Re: [BBC-Micro] bbc-micro Digest, Vol 82, Issue 5
> To: bbc-micro at lists.cloud9.co.uk
> Message-ID: <51E82298.8090108 at lessthan3.org.uk>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> 
> On 18/07/2013 18:04, Wookie wrote:
> 
>> 10*MOTOR 1
>> 20*MOTOR 0
>> 30GOTO10
>> 
>> It makes an 'orrible sound.
> 
> We (as kids) thought it sounded a bit motorbike-like, and if you pressed 
> a key it changed a bit (due to the processing of the key slowing the 
> system down a bit).
> 
>> One of my first hardware things I did was to wire a 6V battery and bike
>> headlight across the cassette relay and then wrote a program to flash it
>> on and off in morse code.
>> 
>> Then I wired up a light dependant resister across the joystick port on
>> my plus1 and used that electron to read the morse code and show it on
>> the screen.
> 
> I did something similar at college to connect two BBC Bs, using 
> ultrasound (we had just built ultrasound sounders and receivers as part 
> of the course).
> 
> You type a message on one computer and it used the motor relay (or maybe 
> a user port line) to pulse the sound generation hardware. The listening 
> end was wired to the analogue port. I think it used a really basic 
> serial protocol, something on for a time, off the same time, then just 
> timing to decode the 7 data bits.
> 
> Nearby dogs probably got a copy of the message too :)
> 
> Cheers
> 
> Chris
> 
> 
> 
> ------------------------------
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> End of bbc-micro Digest, Vol 82, Issue 6
> ****************************************



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