UT61E digital multimeter schematics and integrated circuit datasheet
ES51922 application circuit from ES51922 datasheet: In UT61E1 some features of ES51922 are not used and can be enabled by simple hardware diy: 112 APOSEL […]
Articles by User
PowerBuilder and SQL Sever ‘row changed between retrieve and update’ error.
One issue I was working on was triggering ‘row changed between retrieve and update‘ error on DataWindowupdate. Code was kinda simple, just retrieve some values […]
Adjusting and calibrating Hameg HM-605 channel gain
Yesterday I have noticed that voltage or gain of channel 1 in my scope is a little bit off ( noticed that by analyzing one […]
Getting cheap oscilloscope on ebay
As casual electronics tinkerer I have always wanted to add an oscilloscope to my tools collection but never did so. There are many reasons why, […]
Repairing HAMEG HM-605 oscilloscope trigger problem
Bought used HAMEG HM605 oscilloscope with trigger problem. Tested it with sine wave and yes, cannot trigger it nor with automatic trigger neither manually. Decided […]
LK106 GPS Tracker teardown
Some photos of tear down of GPS tracker I have (“LK106 Mini GPS Tracker Locator Waterproof Drop Resistance Dustproof for Kids Olders Pets”). To connect […]
Low power transmitter using saw resonator
http://jap.hu/electronic/rf/434MHz_SAW-based_oscillators_and_transmitters.pdf
DC Transients
Capacitor vs Inductor Capacitor Fig 4.2.2 Capacitor Voltage Fig 4.2.3 Capacitor Current Inductor Fig. 4.4.2 Current Through an Inductor Fig. 4.4.3 Voltage Across an […]
Signal Differentiation and Integration
Good explanation about Differentiation “The output wave of a DIFFERENTIATOR CIRCUIT is ideally a graph of the rate of change of the voltage at its […]
Duty cycle vs frequency
Good explanation is here. See the image: Frequency = 1 / Tcycle and Hertz is the unit of frequency. It gives the number of cycles in one second. […]