Quick test of Bosch AdvancedVac 20
Quick test of Bosch Advanced Vac 20 vacuum cleaner I bought for our garage – tested with some sawdust, rubber carpet, attached to power tool […]
Month: August 2017
Making ZX Spectrum edge connector
If You are a little bit into retro computing and would like to experiment with ZX Spectrum computer outputs or make some extension board for […]
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 […]
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