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Photo diode response time varies drastically with LED.
Hi Jim,   I can definitely say that ipod led is less brighter compared to the LED that I used for testing. So this could be the point us in the right direction.   Thanks...
Tuesday, 3 April 2018 - 04:45
Photo diode response time varies drastically with LED.
Hi David   I use the torch application to turn on ipod flash LED. To measure the on timing, i use a logic analyser and the time is measured from the start of dip in...
Tuesday, 3 April 2018 - 04:04
Photo diode response time varies drastically with LED.
Jim, you are right. The detector circuit is pretty much a comparator circuit & as you suggest, ipod flash light circuit might be the root to this problem. Hari
Saturday, 31 March 2018 - 05:02
How to upgrade or download a firmware to Atmel SAMDA1 Xplained Pro.
Hi,   Are you sure that you are still connected to the debug USB? (just asking) Now, in device manager, see if the board has been detected. Since it has got an embedded...
Thursday, 29 March 2018 - 11:34
Photo diode response time varies drastically with LED.
hi jim,   Here is the photo diode used. https://www.vishay.com/docs/8329...   I wonder if its really normal to see such long delay to detect an LED turn on? Could there...
Thursday, 29 March 2018 - 11:03
Photo diode response time varies drastically with LED.
Hi Bill,   This really makes sense. But i wonder if its enough to increase sensing time from 50uSec to 7mSec. I'll run some tests and will get back with some...
Thursday, 29 March 2018 - 10:59
Photo diode response time varies drastically with LED.
Hi El Tangas, Actually you got it wrong. Flash light from ipod took longer time to detect like 7 milliseconds. On the other hand, the other LED used took only around 50...
Thursday, 29 March 2018 - 10:50
Unable to program SAM E70 board using SWD
Has anybody seen similar issues before? In our case, since its a custom board, we have not wired out the hard erase pin & the package used is a ball grid array. So there is no...
Saturday, 11 November 2017 - 04:33
I2C scanner for SAM E70
Else if you are looking to listen to IIC chatter thats happening in the bus, you better create a program with ext int & timer modules to decode everything thats happening in...
Saturday, 11 November 2017 - 04:26
I2C scanner for SAM E70
Hi, You can do this by slightly modifying the TWI example code for SAME70. Even though am no expert in atmel studio, but this is something that i have done. You may tweak the code...
Saturday, 11 November 2017 - 04:23
SHA-1 encryption algorithm
I was wondering if we change the 5 constants (h0-h5) with some random numbers, will it affect the overall process? assuming the receiver also knows the 5 constants used in the...
Saturday, 11 November 2017 - 04:15
SHA-1 encryption algorithm
Hi awneil, Sorry for not being specific. We were testing SHA 1 algorithm in our SAMD21 xplained board. It has got nothing to do with the hardware, but was wondering if anybody...
Saturday, 11 November 2017 - 04:10

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