Energy metering Given the sparsity of information provided , I made some simple assumptions about the system (voltage division ratio , current transformer ratio, register settings, communication...
Sunday, 6 March 2016 - 21:00
Energy metering 20 samples/second, 3600 seconds per hour = 72,000 samples/hour. 2240000 / 72000 = 31 watt-hours.
Intermittent TWI Communication Actually I believe the TWI threshold is ~3.5 volts for a 5 volt AVR. See section 28.7 of the data sheet, table 28.6 row 2 .
Tuesday, 23 February 2016 - 22:15
CTC mode issues It's because you are using a delay inside an ISR. As a general rule, never ever do that. Instead, simply set a flag inside the ISR to inform the application that 6 seconds have...
Sunday, 21 February 2016 - 22:36
CPU frequency with SG90 SERVO The delay functions
_delay_ms();are implemented as busy-wait loops. See the docs here http://www.nongnu.org/avr-libc/user-manual/group__util__delay.html
The loop count...
Tuesday, 16 February 2016 - 10:27
Power Transformer restart problem - how to avoid Yes the oil should be checked before energizing. Also it should be chemically tested at intervals, and replaced if contaminated. You might think that an idle transformer...
Friday, 25 December 2015 - 09:51
Need advice for Sleep Modes on atmega328p The key consideration when sleeping is what peripherals must remain operative. You indicate you are using TIMER0 and TIMER1, which are clocked from CLKio. That clock domain is...
Saturday, 19 December 2015 - 22:18
RFID Project Help - Need to deterr Chihuahuas Torby is right, this is the best thread in a long while, with lots of interesting ideas... some practical, some nearing Rube Goldberg territory, but all sound like a lot of fun....
Thursday, 17 December 2015 - 21:58
Suart receive NEEDs help
Without more explicit information (compiler, libraries & etc) I am hesitant, but being an obnoxious fellow I will proceed anyway.
You are shifting in a '0' at...
RFID Project Help - Need to deterr Chihuahuas
In my experience, the RFID tags will be discovered by the wife, and you will be banished to the dog house.
Better IMHO is for the human to carry the RFID, and to...
Given the sparsity of information provided , I made some simple assumptions about the system (voltage division ratio , current transformer ratio, register settings, communication...
20 samples/second, 3600 seconds per hour = 72,000 samples/hour. 2240000 / 72000 = 31 watt-hours.
Looks like an NE-2 neon lamp.
Actually I believe the TWI threshold is ~3.5 volts for a 5 volt AVR. See section 28.7 of the data sheet, table 28.6 row 2 .
It's because you are using a delay inside an ISR. As a general rule, never ever do that. Instead, simply set a flag inside the ISR to inform the application that 6 seconds have...
The delay functions _delay_ms();are implemented as busy-wait loops. See the docs here http://www.nongnu.org/avr-libc/user-manual/group__util__delay.html The loop count...
Yes the oil should be checked before energizing. Also it should be chemically tested at intervals, and replaced if contaminated. You might think that an idle transformer...
The key consideration when sleeping is what peripherals must remain operative. You indicate you are using TIMER0 and TIMER1, which are clocked from CLKio. That clock domain is...
Torby is right, this is the best thread in a long while, with lots of interesting ideas... some practical, some nearing Rube Goldberg territory, but all sound like a lot of fun....
Without more explicit information (compiler, libraries & etc) I am hesitant, but being an obnoxious fellow I will proceed anyway. You are shifting in a '0' at...
cut your losses and move on......with your chair Done that before too
In my experience, the RFID tags will be discovered by the wife, and you will be banished to the dog house. Better IMHO is for the human to carry the RFID, and to...
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