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Unresponsive AtMega6450A in ISP Programming Mode
volbus: I have scoped the output signal ( MISO Pin 22 ) and see that it normally sits at ground. When I issue the Read Signature command via Studio 7, two 5 volt pulses appear....
Monday, 6 February 2017 - 13:51
Unresponsive AtMega6450A in ISP Programming Mode
John: I have tried every selectable interface frequency in Studio 7. Same result for each: signature reads 0xFFFFFF.   No reset line obsessions here, as naked as a jaybird....
Sunday, 5 February 2017 - 16:16
Unresponsive AtMega6450A in ISP Programming Mode
volbus: There are no other connections to the SPI pins. The PCB runs from the 6450 to the 6-pin ISP header are approx. 2.0 inches. The ribbon cable to the AVRISP pod is 7 inches...
Sunday, 5 February 2017 - 16:05
Twi problems with xMega 32A4U
mojo-chan,   You stated:   "I2C is a pain in the arse on the best of days. You need to get the baud rate right, and each device tends to do its own random thing anyway...
Tuesday, 8 September 2015 - 15:53
ATXMega128A1U TWI Problem
Since I have received no comments on my original complete question, let me present a question about the kernel of the problem I am experiencing:   In the ATXMega128A1U...
Friday, 7 August 2015 - 14:17
Do programmable thermostats really save you $$
So Bob, should I fill my wall cavities with 1 Ohm resistors or 1 MegaOhm resistors?   Are you suggesting we should bolt speakers to the inside wall surfaces to repel the...
Friday, 13 February 2015 - 15:10
Do programmable thermostats really save you $$
Ah Yes, the Tyvek wrap. The stuff that prevents wind from blowing thru plywood and other solid sheet materials. How do you suppose they accomplish that miracle of modern...
Thursday, 12 February 2015 - 18:47
Do programmable thermostats really save you $$
Jim,   I tried similar experiments myself years ago in a house I owned which had an oil-fired hot water furnace. I tried for 2 or 3 years to determine answers to the same...
Thursday, 12 February 2015 - 17:30
Reed switch current detection
ignoramus, I was thinking along the lines of a rectifier or bridge too. My hesitation was two-fold. A. While the voltage across the coil would decidedly be unipolar. It would...
Tuesday, 19 August 2014 - 13:29
Reed switch current detection
Farid, I like your idea. It has the advantage of not needed a separate power supply to power IC's etc. The minimal number of high-rel components is also a plus. The reed switch...
Monday, 18 August 2014 - 15:21
D flip flop question - how to make a latch
Your best bet is to use a SPDT momentary switch in conjunction with a 74xx74 dual D-Flop (14 pin pkg). Use one flop for debouncing, the other flop to implement the toggle latch...
Wednesday, 23 July 2014 - 14:56
magnetic field
FearLessPlayer, Your statement: "I have built a simple magnetic field..." makes NO sense in the real world of electronics. Perhaps you mean you have built a device which produces...
Thursday, 10 July 2014 - 13:36

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