DHT Heater using VCCS - PCB or Kit (Possible Group buy)

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Nick
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Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by Nick » Tue Jul 09, 2019 6:32 pm

The other thing you could try is stacking 4 or 5 of these

https://uk.rs-online.com/web/p/mlccs-mu ... s/1795969/
Resistance isn't futile it's V / I.

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Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by IslandPink » Tue Jul 09, 2019 6:42 pm

I couldn't hear any difference myself between 330n and 470n , if it's any help.
I should order some of the ones that are supposed to come 3/2020, at least I have enough to use for current projects.
"The bass is the king of the instruments - it has no known natural predator" (Wobble)

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Nick
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Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by Nick » Tue Jul 09, 2019 6:53 pm

Resistance isn't futile it's V / I.

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Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by IslandPink » Tue Jul 09, 2019 7:45 pm

480 milligrams of loveliness !
"The bass is the king of the instruments - it has no known natural predator" (Wobble)

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Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by izzy wizzy » Tue Jul 09, 2019 10:15 pm

Thanks Nick and Mark. Ordered from Mouser. I've gone for the 0.33u. I did a quick sim and the difference is so tiny. If there is something that I've missed, I would think the time constant could be restored by upping the 470k reistors to 680k. It seems only to alter the performance below 10Hz. Well that's my crude understanding of the situation and in the end, I probably won't know the difference .... I hope.

Cheers,
Stephen

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Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by IslandPink » Tue Jul 09, 2019 10:40 pm

I ordered 10 from Mouser.
It's mad that such a small thing is so important, but honestly, getting the right caps there is the difference between 'very good' and 'magic' . I keep thinking back to what Jono Noble said years ago, which I tried to argue against : .. "everything matters, enormously". He was so right.
"The bass is the king of the instruments - it has no known natural predator" (Wobble)

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Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by RhythMick » Tue Jul 09, 2019 10:46 pm

Quite a big discount for over 50. Im getting 16 boards, so 32 for me.

Andrew you're sorting mine right?

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Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by Andrew » Wed Jul 10, 2019 7:55 am

Hopefully, but I am not immune from parts shortages either.
Analogue, the lost world that lies between 0 and 1.

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Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Post by RhythMick » Wed Jul 10, 2019 8:28 am

Andrew wrote:
Wed Jul 10, 2019 7:55 am
Hopefully, but I am not immune from parts shortages either.
No of course, just saying that Mouser component has quite a big discount for >50.

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