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Subject: Re: Anyone knows any kind of IC chip for the Latching Time of my
Date: Thu, 05 Dec 2002 06:40:12 GMT
NNTP-Posting-Date: Thu, 05 Dec 2002 17:40:12 EST
Organization: BigPond Internet Services (http://www.bigpond.net.au)
Here we go again ;@} . The ISD1510 is one of the simplest speech
recorder chips. It has no end of message signal. As far as I am aware
from my data sheets the ISD25xx series were the first to get this. The
ISD1510 is a very simple single message device, that requires no micro
to run it. The ISD25xx series can be run in simple switch only mode,
and includes an End Of Message output. Go to www.winbond.com and look
for the ISD2560. The manual is in 4 parts. The schematic is quite
You will also need a circuit that detects either switch being pressed
but not both (XOR), that triggers a one shot. The signal from the One
Shot can be used to light the LED and start the speech (using the /CE
input of the ISD2560). The EOM message will be used to reset the
circuit. If the other switch is pressed before EOM it will reset the one
shot, OR disaable /CE, OR exert Power Down to stop the playback. It will
also establish OUT to the toy.
> I need to design a Module for a Y-cable so that two switches must be
> pressed to activate one toy (to teach cooperative play with 2
> students) with jacks on all ends so that a variety of switches and
> adapted toys can be used.
> With help, in general this is what I have to do in order to activate
> a toy by pressing two swiches.
> for each one toy:
> battery + and -, call them Batt+ and batt-
> toy+ and toy-
> switch1 contacts, sw1a and sw1b
> switch2 contacts, sw2a and sw2b.
> Now, connect batt- to toy-.
> Connect batt+ to sw1a.
> Connect sw1b to sw2a
> connect sw2b to toy+
> Thats it! Only when both switches are on will the toy get power.
> In addition, more features are required to add to the design, JUST
> RIGHT AFTER THE FIRST SWITCH IS PRESSED:
> I need to build an indicator such as light or LED to signal that the
> first switch is already pressed.
> And the same time when indicator led turns on, a recorded voice plays
> (such as music or command voice, it said "the first switch is already
> pressed, press the second switch now, counting down 3, 2, 1). In
> this case if the person press the second switch during the recorded
> voice plays, the recorded voice has to be terminated right away.
> Solution for the Voice, I probably will use the ISD Speech Recorder
> Chip. I will wire the trigger to the first switch( the voice will turn
> on), and the reset to the second switch (the voice will be terminated
> if the second switch is pressed)
> However I want for the design that when the first switch is pressed
> and the recorded voice plays, and the second switch is still not
> pressed eventhough the recorded voice ends, then the first switch have
> to pressed again and then the second swith after in order to activate
> a TOY.
> Assume the amount of latching time equals to the amount of time the
> recorded voice plays. Is there any kind of chip for the LATCHING TIME?
> or the ISD speech recorder chip will do that to itself.