On 24/12/2016 19:04, "Brent Hilpert" wrote:
> On 2016-Dec-24, at 4:07 AM, Adrian Graham wrote:
>> On 24/12/2016 03:48, "Brent Hilpert" wrote:
>>
>>> The ICL7611 is, I expect, a very-low-power (Intersil's niche) op amp.
>>> Together
>>> with the CMOS 4081
On 2016-Dec-24, at 4:07 AM, Adrian Graham wrote:
> On 24/12/2016 03:48, "Brent Hilpert" wrote:
>
>> The ICL7611 is, I expect, a very-low-power (Intersil's niche) op amp.
>> Together
>> with the CMOS 4081 the circuit appears tailored for low-power operation.
>> Is it supplied
> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Adrian
> Graham
> Sent: 24 December 2016 12:09
> To: General Discussion: On-Topic and Off-Topic Posts
> <cctalk@classiccmp.org>
> Subject: Re: ICL7611 op-amp (was: Motor
On 24/12/2016 04:34, "Glen Slick" wrote:
> On Fri, Dec 23, 2016 at 7:48 PM, Brent Hilpert wrote:
>>
>> The op amp is configured as a schmitt trigger or comparator with hysteresis:
>> There is no negative feedback so it is operating at full gain
On 24/12/2016 03:48, "Brent Hilpert" wrote:
>> On a whim I managed to solder new legs onto the old LM385Z and it works,
>> giving 1.2V at IN-, but the output is still only 0.2V.
>>
>> I don't mind admitting I'm stumped :)
>
>
> The op amp is configured as a schmitt trigger
On Fri, Dec 23, 2016 at 7:48 PM, Brent Hilpert wrote:
>
> The op amp is configured as a schmitt trigger or comparator with hysteresis:
> There is no negative feedback so it is operating at full gain and
> functions like a comparator.
> However there is positive
On 2016-Dec-23, at 4:52 PM, Adrian Graham wrote:
>
> Thanks for all the help so far, I've moved on quite a way but I still
> haven't managed to get my head around op-amps other than the basics. If I
> may trouble your experienced heads with a small circuit diagram:
>
>
Hi folks,
Thanks for all the help so far, I've moved on quite a way but I still
haven't managed to get my head around op-amps other than the basics. If I
may trouble your experienced heads with a small circuit diagram:
http://www.binarydinosaurs.co.uk/STCExecutelStartupCircuit.jpg
This is the
On 21/12/2016 03:23, "allison" wrote:
>> If one of the other outputs is driving a CMOS device the output may
>> not go high enough to satisfy it, however I would expect the reset
>> input on the 8085A to be TTL compatible.
> The 8085 reset input is not TTL, its schmidt
On 21/12/2016 00:58, "Paul Berger" wrote:
> On 2016-12-20 8:50 PM, Adrian Graham wrote:
>> Evening folks,
>>
>> (it's evening here)
>>
>> Typically for troubleshooting around $FESTIVAL I find a more-than-likely
>> dead MC14081B (CMOS quad dual-input AND gates) just as UK
On 12/20/2016 07:58 PM, Paul Berger wrote:
> On 2016-12-20 8:50 PM, Adrian Graham wrote:
>> Evening folks,
>>
>> (it's evening here)
>>
>> Typically for troubleshooting around $FESTIVAL I find a more-than-likely
>> dead MC14081B (CMOS quad dual-input AND gates) just as UK postage
>> ends for
>>
On Tue, Dec 20, 2016 at 5:58 PM, Paul Berger wrote:
> (I might have a CD4081B somewhere too, which is pin compatible according to
>
>> the datasheet)
>>
> Same component Motorola prefixed their 4000 series CMOS numbers with a 1
> to be different.
>
To be fair, it wasn't just
On 2016-12-20 8:50 PM, Adrian Graham wrote:
Evening folks,
(it's evening here)
Typically for troubleshooting around $FESTIVAL I find a more-than-likely
dead MC14081B (CMOS quad dual-input AND gates) just as UK postage ends for
the next few days so getting a replacement won't happen until next
Evening folks,
(it's evening here)
Typically for troubleshooting around $FESTIVAL I find a more-than-likely
dead MC14081B (CMOS quad dual-input AND gates) just as UK postage ends for
the next few days so getting a replacement won't happen until next week.
Question is, aside from having to make
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