making 3. Batch Texas Avenger "TA" / Bistro HD OTSM drivers fully tested running Bistro or Narsil, Clicky or E-switch, SIR800

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JasonWW
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Lexel, on the 30mm boards what diameter would they be without the excess material on the edge?

Is the center part basically the same as the 22mm?

Lexel
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the center part is almost identical to 22mm, some parts have a little more space between em like the bleeder

you can reduce it to about 24mm and still got some copper ring around

Agro
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Do you use 350 or 380 mA 7135s?

Lexel
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350mA

Agro
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When the time’s up to make an order?
I think that’s the driver I want, but I changed my mind twice in a week and would rather have it settle in me Smile

Lexel
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Getting in the final stage of ordering the parts

first 6 Oshpark boards and 200 AMCs arrived yesterday

today a big part of Oshpark boards arrived

just amazing how tiny a 17mm driver looks compard to 46mm

BUT
3 of the 22mm LDO bards came without contact ring on the MCU side
and 3 46mm SRK without the contact ring on the retaining ring side,
just removing the paint with a knife or chemical will work

I will contact Oshpark to get replacements for them,
but it should not be a big deal to use em, only if you got no problem with it
or you got to wait another 3 weeks

Lexel
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Please everyone check if the data in the Excel sheet is what you want, I will build what is listed there


Parts from Digikey will get ordered today

Batch is limited to 58 drivers by the SIR800 FET

2 Backup MCUs ordered in case one is faulty like last batch so probably 60 possible with IFR or LF PAK33 (15mm)

43 drivers are taken 2 pending feedback

Agro
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I’d like 2*17mm. Max number of 7135. It can go without firmware, I want flash my own Bistro-based image anyway.

Lexel
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Agro wrote:
I’d like 2*17mm. Max number of 7135. It can go without firmware, I want flash my own Bistro-based image anyway.

I will flash it for testing the driver anyway, of course you can send me your custom hex file

Standard TA Bistro or HD OTSM?
OTSM has more expensive parts but no more issues with hot light and OTC timing getting almost unusable
springs?

MtnDon
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Lexel wrote:
Please everyone check if the data in the Excel sheet is what you want, I will build what is listed there

Thumbs Up mine are OK

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Lowtech
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Seems ok

steve42
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All good on mine.

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Jensen567
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All good for me

Lexel
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more boards from Oshpark
sorted by size

ordering from Digikey tomorrow

Agro
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I’m a bit lost with HD OTSM, I haven’t spotted its existence until now.
Reading / skimming quickly through its topic I guess that’s what I want, but is there a summary of hardware differences somewhere?

I’ll take 1 short spring.

DeJaVu
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Hi there,
Id like to get in on the fun. Intersted in a narsil driver for Convoy L6

Mr.Scott
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My line on the spread sheet looks good.

Question for all (not just Lexel). I have ordered a 46mm for a Q8. I requested the temp sensor set to 60°C. I see on the spread sheet the other 46mm orders have selected 70°C. Am I being too conservative (setting too low)? What would you use for a Q8?

JasonWW
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DeJaVu wrote:
Hi there,
Id like to get in on the fun. Intersted in a narsil driver for Convoy L6

You will have to choose between having low voltage protection and no temperature stepdown (narsil v1.2) or

temperature stepdown, but no LVP (narsil v1.4).

I went with LVP and let my hand control the temperature.

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Forgive me my noobish question, but what output does this driver give? Is it able to light up an XHP 70 in an 18650 form? If so, i am interested

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JasonWW
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Yokiamy wrote:
Forgive me my noobish question, but what output does this driver give? Is it able to light up an XHP 70 in an 18650 form? If so, i am interested

It’s a FET driver, so whatever the batteries can give.

In my L6 with Liitokalas it pulls 12 amps. If I put some good unprotected 18650 cells in my same light I doubt it would deliver the same amps just because the voltage will sag more under load. I’d guess 10 to 11 amps maybe.

Is that what you were asking?

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Exactly Jason!
So basically, if i use 2S you can light up emitters up to 8,4V and lots of current up to a level where the cells or other parts limit the output?

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JasonWW
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Yokiamy wrote:
Exactly Jason!
So basically, if i use 2S you can light up emitters up to 8,4V and lots of current up to a level where the cells or other parts limit the output?

Yeah, pretty much.
Lexel
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So I made some minor changes to the Bistro OTC board using a high quality 0805 capacitor with low temperature shift and only 5% tolerance this should get better than the standard X7R 0603 one when the light gets hot

https://www.digikey.com/product-detail/en/kemet/C0805C105J8NACTU/399-576...

also on ordering the parts I looked around and checked if there is a better 47uF tantal capacitor and I found that Flintrock pretty much choose the most expensive on market, getting another brand with identical specifications drop the price by 1$
as I got also over 10 of those capacitors price dropped also

the question is if I can use this new capacitor and save almost 1.5$ to the first Bistro OTSM material calculation, getting you a partial refund on the paypal transaction?

Lowtech
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Not sure if it applies to me but no need for me anyway.

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OK, I educated myself on Bistro-HD OTSM. Definitely looks like the thing, but I need a clarification. The firmware’s thread mentions that it needs ATtiny85 revision C. It reports that all trial to find it failed. Did you manage to find it?

Lexel
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Agro wrote:
OK, I educated myself on Bistro-HD OTSM. Definitely looks like the thing, but I need a clarification. The firmware’s thread mentions that it needs ATtiny85 revision C. It reports that all trial to find it failed. Did you manage to find it?

Bistro HD OTSM runs on Attiny 25V

extra parts price for HD OTSM dropped to 1.5$ as I did change the capacitor brand with same specifications and are above 10 parts Digikey lower prices as well
0.92$ vs original calculation of 2.23$ for the capacitor

Agro
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Any chance for 45V?

Lexel
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for 0.5$ more I can order 45V I am ordering later today

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So I’d like both divers with 45V. Thank you.

steve42
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Excuse my ignorance but what is the ‘45V’?

steve haury

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