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water heater energy logger
Yes and no.  The water heater is directly wired in.  The heater in here has a plug, as does the stove/oven combo.  They are special plugs.  S.
Saturday, 6 March 2021 - 11:25
water heater energy logger
ralphd wrote:   From the street, every house gets 2 120V 60Hz feeds both 180 degrees out of phase. ... Heavy loads like water heaters, clothes dryers, and electric ovens use...
Saturday, 6 March 2021 - 01:36
water heater energy logger
awneil wrote: I think the Americans have 240V for some "heavy" loads (eg, water heaters?) - I think it's some sort of split phase thing?   EDIT   This: https://en....
Friday, 5 March 2021 - 12:50
water heater energy logger
ralphd wrote: Any other ideas based on what a typical hacker would have around home or could pick up at a local hardware store?   Two identical grungy old transformers....
Friday, 5 March 2021 - 12:06
Three AVRISPs failed this week. Why?
Some years back wildfires were raging in my area, and at the time I had three cars and only two people to drive them.  We somewhat glumly decided the lovely old family...
Wednesday, 24 February 2021 - 19:24
How to "Find" ?
You hear a wumpus.  S.
Tuesday, 23 February 2021 - 07:59
Button debouncing.
Fair 'nuff.  That or you could use register pairs that have atomic 16-bit 'add' instructions - dunno if the compiler will do that.  Anyhow, point being it's a...
Friday, 12 February 2021 - 05:02
Button debouncing.
kabasan wrote:   uint16_t my_millis(void){ cli(); uint16_t ret = tick_ms; sei(); return ret; }   Strictly technically, kabasan, this is considered '...
Friday, 12 February 2021 - 03:25
Fast conversion of Integer to BCD; assembly atmega328p.
Seven for the Dwarven Lords, in their halls of stone.
Wednesday, 10 February 2021 - 11:58
Simple formula for binary to BCD conversion
For example, if the least significant bit of the input hex is set, then the number is odd, and therefore the least significant bit of the packed BCD is therefore set - because it'...
Friday, 5 February 2021 - 13:17
Simple formula for binary to BCD conversion
One of my more fundamental assumptions here is that there is absolutely no reason to convert to BCD except for display, so there never is any reason to read the output of the LUT...
Friday, 5 February 2021 - 13:11
Simple formula for binary to BCD conversion
The way I looked at it, sparrow2, was that you have 20 output bits, and each can have 65,000(ish) inputs, therefore you need (absolute worst case!) about 1.4 million logic gates....
Friday, 5 February 2021 - 11:57