USART- Dual Speed: doubts SM@23 wrote:
Hi,
I have read the datasheet but still have doubts about the concept. In setting USART in double mode, the transfer rate doubles, i.e. every bit takes nearly half...
Wednesday, 9 March 2022 - 03:58
How to implement a wait loop for timeout using counter? avrcandies wrote:
The whole thing is a bit of a mess...ALL you need to do in the IRQ is increment something , like
ISR(TIMER0_COMPA_vect)
mydog++; //count irqs
then in...
Wednesday, 9 March 2022 - 03:47
How to implement a wait loop for timeout using counter? Because you may want the timer INT to continue for other tasks, the way I code this type of problem is to use a byte-sized saturating counter
ISR(TIMER0_COMPA_vect)
{
if (...
Wednesday, 9 March 2022 - 00:51
Programmer for AT89S2051, Part 2 :) Jeckson wrote:
It will be nice to used AVRdude.
That's not mandatory, in the other thread was this suggestion to simply use the -C command line
You do not have to edit...
Tuesday, 8 March 2022 - 18:51
MOSFETs burning out DJJ_41010 wrote:
.... The thing is, they're burning out for no particular reason.
Nope, they are burning out because they have been over...
Monday, 7 March 2022 - 01:35
Programmer for AT89S2051, Part 2 :) JerryMouse wrote:
and here are the capacitors and my DMM
Did you check the XTAL osc with a DMM + fast Diode (1N4148 / BAW62 etc) ?
That will confirm the 2051 is oscillating...
Sunday, 6 March 2022 - 19:28
ATtiny85 elimination of frequency measurement inaccuracy MiroSmet wrote:
Now, I hope, I have already done everything possible to achieve the highest possible measurement accuracy with ATtiny85.
Great is it mostly working now....
Saturday, 5 March 2022 - 21:01
Programmer for AT89S2051, Part 2 :) JerryMouse wrote:
ok, I modified the scheme, but situation is identical. :(
I do not see a Vcc-Gnd decoupling cap shown ?
That shows 5V hard wired to RST, It's...
ATtiny85 elimination of frequency measurement inaccuracy MiroSmet wrote:Hi, I tried to make a mains frequency meter using ATtiny85....
... I mean, if you don't have idea, how to accurate measurre this wasted time and calculate it to...
Saturday, 5 March 2022 - 00:48
Do floating inputs consume power while in power-down mode? robiw wrote:
Yes, it is possible that you might be right but...but I connected wires to the power supply after switching it on so the voltage was stable during connection. R...
Friday, 4 March 2022 - 19:10
alternative for switching 220v with relais flexbex1 wrote:
So to a special problem I am working on in the moment. I have a waterpump which is controlled by, you name it, a relais. I replaced this relais already 4...
SM@23 wrote: Hi, I have read the datasheet but still have doubts about the concept. In setting USART in double mode, the transfer rate doubles, i.e. every bit takes nearly half...
avrcandies wrote: The whole thing is a bit of a mess...ALL you need to do in the IRQ is increment something , like ISR(TIMER0_COMPA_vect) mydog++; //count irqs then in...
Because you may want the timer INT to continue for other tasks, the way I code this type of problem is to use a byte-sized saturating counter ISR(TIMER0_COMPA_vect) { if (...
Jeckson wrote: It will be nice to used AVRdude. That's not mandatory, in the other thread was this suggestion to simply use the -C command line You do not have to edit...
DJJ_41010 wrote: .... The thing is, they're burning out for no particular reason. Nope, they are burning out because they have been over...
JerryMouse wrote: and here are the capacitors and my DMM Did you check the XTAL osc with a DMM + fast Diode (1N4148 / BAW62 etc) ? That will confirm the 2051 is oscillating...
MiroSmet wrote: Now, I hope, I have already done everything possible to achieve the highest possible measurement accuracy with ATtiny85. Great is it mostly working now....
JerryMouse wrote: ok, I modified the scheme, but situation is identical. :( I do not see a Vcc-Gnd decoupling cap shown ? That shows 5V hard wired to RST, It's...
robiw wrote: Hi, .. But the FUNDAMENTAL questions left unsolved: "Do floating inputs consume power while in power-down mode?" The manufacturer says no according to the...
MiroSmet wrote:Hi, I tried to make a mains frequency meter using ATtiny85.... ... I mean, if you don't have idea, how to accurate measurre this wasted time and calculate it to...
robiw wrote: Yes, it is possible that you might be right but...but I connected wires to the power supply after switching it on so the voltage was stable during connection. R...
flexbex1 wrote: So to a special problem I am working on in the moment. I have a waterpump which is controlled by, you name it, a relais. I replaced this relais already 4...
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