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Multiple flash writes?
clawson wrote: How much data and how often do you plan to SPM it? As long as any location is not written too often you should be OK but if you were recording something every 20ms...
Friday, 5 April 2019 - 18:42
Evaluation and multiple programming
You could put a special boot loader in each of the 400 chips.  Have a terminal program transmit the hex ascii to all 400 at the same time with a fixed delay at the end of...
Thursday, 4 April 2019 - 21:36
Using a IR reciever on my Atmega328P in Atmel7
I didn't try very hard to figure out what you are trying to do. Admux = 0b01100001 doesn't make your intent clear. It looks like you are using the external reference to measure...
Sunday, 31 March 2019 - 21:38
Using a IR reciever on my Atmega328P in Atmel7
My infrared sensors produce logic level pulses. What is your infrared sensor?
Sunday, 31 March 2019 - 19:08
Uart mux switch
Do you need inverters like a max232 interface? If all you need is 0v - 5v you can probably get inversion and multiplexing with no more transistors.
Sunday, 31 March 2019 - 16:26
Uart mux switch
Did you consider a software bit bang uart for the second one?
Sunday, 31 March 2019 - 16:12
How Reliable Are MCU's?
Waaay back then integrated circuit manufacturing wasn't as developed as it is now. Contamination and purple plague were problems that caused failures a long time after parts were...
Friday, 29 March 2019 - 04:07
State of gpio when Microcontroller is breaks
Use a 555 timer to turn on the rs485 transmitter. If the microprocessor dies the 555 times out and shuts off the transmitter. What if the 555 faiils? Put an attiny 85 between...
Thursday, 28 March 2019 - 22:37
whats the best way to implement a not gate.
The simple circuit is slow because it takes time to charge & discharge the base capacitance through the base resistor. The switching, once it starts, is slow. One transistor...
Friday, 1 March 2019 - 14:34
Blew a fuse, and then blew a fuse
The skinny little meter wires just aren't enough for 10 or 20 amp measurements. I used to use a 13 inch piece of AWG #10 wire with big ring terminals as a shunt resistor. It's 0...
Friday, 1 March 2019 - 12:52
Simple Way to Check Wire Continuity
I needed to check a bunch of 8 conductor cables. I put 4 resistors between pairs. Each pair would have a known resistance. From each wire to the other 6 there would be an open...
Thursday, 28 February 2019 - 13:49
Blew a fuse, and then blew a fuse
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.
Wednesday, 27 February 2019 - 20:34