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Old 04-24-2012, 02:16 AM #1
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Default 5 mode attiny control circuit for Benboost

I reverse engineer the design in most flashlight's brightness control part of the driver. I isolate the PWM and microcontroller part of the circuit and hook it up to BenBoost or other similar driver runs with PWM. The board is tiny!! And the code for Attiny13 can be find on budget light forum. I program this to be 5-mode, low-mid-high-strobe-SOS with mode memory. It fits into Aixiz with BenBoost, It's a tight fit, but it fits. the whole board is 7mm tall.









Here is a video!!


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Old 04-24-2012, 03:20 AM #2
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Default Re: 5 mode attiny control circuit for Benboost

Update schematic as RHD requested!!
The diode is for reverse protection, optional.
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Old 04-24-2012, 03:22 AM #3
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Default Re: 5 mode attiny control circuit for Benboost

This is really neat.

eBay has some attiny programmers that work with the SOIC8 chips. I've also noticed in general that you can get SOT-23-6 to DIP adapters, that would presumably then work with an attiny DIP programmer.

This is definitely a project I want to try out

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Originally Posted by wee40811 View Post
Update schematic as RHD requested!!
The diode is for reverse protection, optional.
Thanks!

Which code on BLF did you use ?
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Old 04-24-2012, 03:36 AM #4
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Default Re: 5 mode attiny control circuit for Benboost

My friend told me that he found the code on there, I didn't have the time to mess with programming yet. Too busy at school. I assume you can search "flashlight with perfect mode"
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Old 04-24-2012, 03:48 AM #5
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Default Re: 5 mode attiny control circuit for Benboost

Here is another schematic reverse engineer from AK-47 7135 driver. This one can choose from 3 different settings by shorting out TP1, TP2, TP3 with ground. this will set the mircocontroller into Low-high, low-mid-hi-strobe-sos, or low-high-slow stobe.
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Old 04-24-2012, 06:32 AM #6
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Default Re: 5 mode attiny control circuit for Benboost

damn, there goes my idea ..... at least I am using PIC microcontroller, few external components, and I do the coding myself MUAHAHAHA I can do modes whatever you need and you can regulate the brightness from 1 to 100% with an external button


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Old 04-24-2012, 07:30 AM #7
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Default Re: 5 mode attiny control circuit for Benboost

I just look at the C file of the code!! It's not as hard as I thought!! Hopefully, I'll figure it out at the end of the week!!
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Old 04-24-2012, 11:07 AM #8
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Default Re: 5 mode attiny control circuit for Benboost

You don't need R1/R3 in the schematic in post#2. It is a voltage divider for the ADC. You could however use that for Vin measurement. Vin>3 Volt: driver turns on - Vin<=3.0V: driver does not turn on. And don't forget the integrated EEPROM. E.g. use it to save the last mode (or don't). Just a few ideas...
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