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From: john larkin <jl@650pot.com>
Newsgroups: sci.electronics.design
Subject: Re: Fast monostable with a transistor array
Date: Sun, 23 Jun 2024 06:16:17 -0700
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On Sun, 23 Jun 2024 22:29:40 +1000, Chris Jones
<lugnut808@spam.yahoo.com> wrote:

>On 19/06/2024 8:17 pm, Bill Sloman wrote:
>> On 19/06/2024 1:28 am, john larkin wrote:
>>> On Tue, 18 Jun 2024 13:48:58 -0000 (UTC), piglet
>>> <erichpwagner@hotmail.com> wrote:
>>>
>>>> john larkin <jl@650pot.com> wrote:
>>>>> On Tue, 18 Jun 2024 18:44:37 +1000, Bill Sloman <bill.sloman@ieee.org>
>>>>> wrote:
>>>>>
>>>>>> On 14/06/2024 1:20 am, Bill Sloman wrote:
>>>>>>> One option John Larjkin doesn't seem to have explored is using 
>>>>>>> Renesas
>>>>>>> HFA3096 five transistor array as basis for his mononstable and level
>>>>>>> shifter.
>>>>>>>
>>>>>>> It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a 
>>>>>>> single array.
>>>>>>>
>>>>>>> https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216
>>>>>>>
>>>>>>> Two of the NPN parts could make up my emitter-coupled monostable, and
>>>>>>> the two PNP parts could level shift the output.
>>>>>>>
>>>>>>> The Renesas website offers Spice models for both the NPN and the PNP
>>>>>>> transistors, which one could plug into an LTSpice simulation, at the
>>>>>>> cost of making it look too messy for the more sensitive designers 
>>>>>>> to be
>>>>>>> able to look at.
>>>>>>
>>>>>> I've spent that last four days in hospital with Covid-19 of the 
>>>>>> colon -
>>>>>> dramatic when it started but tedious thereafter.
>>>>>>
>>>>>> This thread hasn't gone all that well. John Larkin has ignored the 
>>>>>> fact
>>>>>> that I was talking about just the 3096. There have been some sensible
>>>>>> comments, but I'm still too sick to try and provide any kind of 
>>>>>> summing
>>>>>> up of the sensible bits.
>>>>>>
>>>>>> -- 
>>>>>> Bill Sloman, Sydney
>>>>>
>>>>> OK, we can defer discussing your one-shot circuit until you feel
>>>>> better. I've had some medical adventures of my own.
>>>>
>>>> My sympathies to both of you, coincidentally I am just getting back 
>>>> on my
>>>> feet after an eight day common cold from hell (was not Covid)
>>>
>>> I'm now wearing a 24-hour recording EKG thing. It's really no trouble
>>> at all. Pretty cool technology.
>> 
>> And they have been around for at least thirty years. My mother got stuck 
>> with being a guineau pig for one some thirty years ago.
>> 
>>> It's a pity that there is no low-drama equivalent for blood pressure
>> You do have to compress the upper arm.
>> 
>
>FYI if you want to avoid getting covid again, it appears to be pretty 
>much exclusively airborne, so you probably won't get infected if you 
>(and your family if any) wear a respirator that fits you well, every 
>time you are indoors with people not from your household.
>
>To know whether the respirator fits you, you can do a DIY fit-test with 
>a handheld nebuliser from a pharmacy, which you put a strong-tasting 
>solution such as 3M FT-32 which you can buy from RS components. You 
>breathe in through your mouth with your tongue slightly out, whilst 
>surrounding the outside of the respirator with the bitter fog, and if 
>the resporator leaks, you will taste it. Generally you will need to wear 
>one with headloops and not earloops in order to pass. A 3M Aura is a 
>good one to try - most people can get it to pass the test.
>
>I haven't been sick at all since 2019, unless you count hangovers or 
>headaches from staying up too late. The main downside is that I can't 
>eat inside restaurants, so I order take-away instead. That seems like a 
>good deal to me, but others have different priorities from which I will 
>not attempt to dissuade them at present.
>

A Buzz Lightyear sort of full biohazard suit would be safer.