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Blew a fuse, and then blew a fuse
Mine came at a *bit* lower voltage . . .   My father borrowed my meter, and was "showing me how" to check when he shorted it across 220v on my mother's dryer . . . I think I...
Friday, 1 March 2019 - 05:38
Blew a fuse, and then blew a fuse
bobfrench wrote:The biggest deal is the high voltage. If you are measuring a current on a 440v circuit and the fuse blows it will be the open fuse between you and the high voltage...
Friday, 1 March 2019 - 01:33
Sharing part between usb and an at-09 on a nano 328p
gchapman wrote: Two examples of such are "Shared Use of SPI Programming Lines" and "Shared Use of JTAG Lines" in AVR042: AVR Hardware Design Considerations     Wow...
Saturday, 15 December 2018 - 22:02
practical breadboard wiring: headers, fine wire on devices, stripping wire, etc.
I found these clippers to order online from home depot, fr $4.72 https://www.homedepot.com/p/Pro-sKit-Precision-Wire-Stripper-AWG-30-20-CP-301G/206679686.  They should...
Saturday, 15 December 2018 - 21:21
Sharing part between usb and an at-09 on a nano 328p
A thought that hit me this morning . . .   What about putting a resistor (1k? 10k?) between the serial peripheral TX and the arduino RX on a non-usb such as mini pro? Kind of...
Saturday, 15 December 2018 - 21:11
Sharing part between usb and an at-09 on a nano 328p
Gee, and 20ma would make it *so* say to get a printout    At this point, I think I've discovered enough to conclude that it is *impossible* to share the part with an AT-...
Saturday, 15 December 2018 - 00:49
Sharing part between usb and an at-09 on a nano 328p
Paulvdh wrote: I assumed you are familar with and/or have considered other RF options. Is this correct?   In a lukewarm kind of way :)   I really hadn't seriously...
Thursday, 13 December 2018 - 03:28
Sharing part between usb and an at-09 on a nano 328p
For *most* of the TI line, there is a free suite available.  It doesn't include the cc2541.  The only thing that does is $2,000 (although there is a 30 day free trial...
Monday, 10 December 2018 - 00:05
Sharing part between usb and an at-09 on a nano 328p
Life interrupted (the story of my life )     Anyway, what I found was that the TXD of the AT09 is high when it comes on.   Also, the enable line seems to be...
Sunday, 9 December 2018 - 16:49
Sharing part between usb and an at-09 on a nano 328p
ki0bk wrote:   I did some googling and also did not come up with any useful info on the enable pin, so time to do some experimenting with the pin. I'd begin with a VOM and...
Thursday, 22 November 2018 - 02:28
Sharing part between usb and an at-09 on a nano 328p
Those are, basically, my concerns.   There isn't a situation where I would want both serial going--either it's being programmed and I don't want the bluetooth , or it's not...
Wednesday, 21 November 2018 - 01:17
Can't download new sketch after changing serial speed
Thanks; that makes sense.  There were indeed a slew of updates that I patiently waited to install.     So even if I selected the 328p bootloader, it would have...
Wednesday, 10 October 2018 - 16:36

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