Re: [Tinyos-help] Tmote GPIO's current capacity

2007-02-19 Thread Santosh Godbole
Great help. Thank you all for the guidance Regards, Santosh Michael Schippling wrote: Just for reference, I recently discovered the ULN2803 8 channel driver chip that can do about .25A per pin, is cheaper than 8 equivalent transistors, and has diode protection built in. Plus it's basically one

Re: [Tinyos-help] Tmote GPIO's current capacity

2007-02-19 Thread Michael Schippling
Just for reference, I recently discovered the ULN2803 8 channel driver chip that can do about .25A per pin, is cheaper than 8 equivalent transistors, and has diode protection built in. Plus it's basically one input and one output per channel, so only a bit more soldering on a breadboard... Might

Re: [Tinyos-help] Tmote GPIO's current capacity

2007-02-19 Thread Philip Levis
On Feb 19, 2007, at 2:51 PM, Joe Polastre wrote: As per the f1611 datasheet (rtfm), at 2.2V, the max is 1.5mA per pin and 12mA max over all ports at 3.0V, the max is 6.0mA per pin and 48mA max over all ports Thus, pal is using the devices outside of specified operating conditions. It is recom

Re: [Tinyos-help] Tmote GPIO's current capacity

2007-02-19 Thread Joe Polastre
As per the f1611 datasheet (rtfm), at 2.2V, the max is 1.5mA per pin and 12mA max over all ports at 3.0V, the max is 6.0mA per pin and 48mA max over all ports Thus, pal is using the devices outside of specified operating conditions. It is recommended that you use a transistor to switch larger c

Re: [Tinyos-help] Tmote GPIO's current capacity

2007-02-17 Thread Philip Levis
On Feb 17, 2007, at 9:13 AM, Santosh Godbole wrote: Hi All, Does anyone know how much current a GPIO pin on tmote can supply if used to power an external device? I can't recall what the datasheet says, but I recall being able to drive 40mA. I was trying to drive some EL-wire, which requ

[Tinyos-help] Tmote GPIO's current capacity

2007-02-17 Thread Santosh Godbole
Hi All, Does anyone know how much current a GPIO pin on tmote can supply if used to power an external device? Regards, Santosh ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinf