EEssential
The essence of electrical engineering.
Thursday, August 27, 2020
Computer Software Notes
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Windows Change network setting with commands netsh interface ip set address "Local Area Connection" static IP NetMask Gateway ...
Monday, August 3, 2020
Tile Tracker
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Powers off 3V CR2032 lithium coin battery One piezo buzzer Toshiba's TC35678FSG BLE 4.2 Cortex-M0 (13 or 26MHz) 384KB ROM, 192KB RAM, ...
Monday, July 20, 2020
FPGA Design on Linux
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I'm dusting off an old Digilent Nexys 2 board with a Xilinx Spartan 3E FPGA. The older FPGA devices are not supported by Xilinx Vivado,...
Monday, June 1, 2020
Router
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I finally retired a ten year old router which can no longer support the speed from the cable modem. It has been running DD-WRT firmware; no...
Wednesday, April 29, 2020
Reading Computer Architecture
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Hennessy and Patterson's Computer Architecture book was first published in 1990 and the sixth edition came out in 2017. That is a span ...
Tuesday, April 7, 2020
$3 USB Li+ Battery Charger
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The $3 Li+ battery charger is very simple in construction. It has a single layer PCB. I could not identify the IC, which linearly regulate...
Sunday, March 29, 2020
LoRa on RPi
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LoRa is a low-power and long distance wireless technology. I have a set of Semetch SX1272 boards. We'll try to use them to communicate...
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