EEssential
The essence of electrical engineering.
Monday, December 7, 2015
PS/2 Keyboard Emulator
›
One of my computers had a CMOS checksum error and waited for me to press a key to proceed. I usually talked to this computer running Linux ...
Wednesday, December 2, 2015
AT91SAM7 Code Development
›
I recently had to develop code for the AT91SAM7 microcontroller. AT91SAM7 has an ARM7TDMI processor core, an architecture that has been sup...
Thursday, November 26, 2015
Battery Powered
›
To power portable IoT modules, we need to regulate battery voltage to a stable voltage, usually 3.3V. A LiPo pack is attractive: it can be...
Friday, October 16, 2015
Toy Jeep Makeover
›
A RC toy jeep is gutted and transplanted with a new controller, a Bluetooth communication module and new sensors. Toy RC Jeep Newbrigh...
Friday, October 9, 2015
3.3V and 5V Systems
›
High performance logic has long moved to very low voltages (sub 1V) demanded by nanoscale fabrication technology. But a lot of systems stil...
Wednesday, September 30, 2015
A Cheap Sonar Module
›
For less than $1, I bought a HC-SR04 sonar module on eBay. It can't get cheaper than this. I was a little disturbed first when I sa...
Sunday, September 27, 2015
A Lithium Ion Battery USB Charger
›
A simple linear battery charger that draws power from a USB port is designed for 14500 lithium ion battery (which is about the same size as ...
‹
›
Home
View web version
