EEVblog No Script, No Fear, All Opinion

How a diode voltage inverter circuit works. Turns any PWM or clock signal into a low power negative voltage rail. This can be clocked from a microcontroller, existing DC-DC converter, 555 timer etc. Voltage Doubler Video Forum HERE Podcast: Download

What’s inside a 1980 vintage Yugoslavian digital multimeter, the Digimer 10 from Iskra Schematic Photos Forum Podcast: Download

Blinker hybrid schematic http://a-squaredtec.com/ http://blisterpackaging.com/ http://www.flickr.com/photos/64683169@N00 http://gtronics.net Forum HERE Podcast: Download

Dave takes a look at the Owon SDS Series “Smart” oscilloscope. The 300MHz model SDS9302. But apart from bandwidth and sample rate, the same as the SDS8302, SDS8202, SDS8102, SDS7102, and SDS6062. Forum topic HERE Podcast: Download

Fundamentals Friday All about opamp input bias currents. Dave goes through the theory, and then does some practical measurements and tweaking. Forum HERE Podcast: Download

Teardown Tuesday Inside the Keithley 2015 THD 6.5 digit bench multimeter. Not just a multimeter, it does low noise signal generation and automated audio THD system measurement. Forum Topic HERE Podcast: Download

Dave opens his mail again. http://windytan.blogspot.com http://tindie.com http://delphijustin.weebly.com http://turtleneckhub.com Smart Tweezers Arduino Workshop Book Podcast: Download

Dave investigates an issue with the input offset voltage on the Analog Devices AD8628 zero-drift chopper opamp. The answer will be presented in the next video. Chopper Amplifier video HERE Forum Topic HERE Podcast: Download

Inside the GW Instek GDS-2000A series oscilloscope. Datasheet links: http://www.ti.com/lit/gpn/adc08d500 http://www.ti.com/lit/gpn/lmh6518 http://www.analog.com/static/imported-files/data_sheets/ADCMP567.pdf http://www.analog.com/static/imported-files/data_sheets/AD8370.pdf http://www.analog.com/static/imported-files/data_sheets/AD8009.pdf http://www.analog.com/static/imported-files/data_sheets/AD8000.pdf http://www.analog.com/static/imported-files/data_sheets/AD9834.pdf http://pdf1.alldatasheet.com/datasheet-pdf/view/151684/GSI/GS88036BGT-333I.html Forum Topic HERE Podcast: Download

Over an hour of Dave unboxing the new GW Instek GDS-2000A series VPO oscilloscope, and first impressions on trying to use it. Some comparison to the Rigol DS2000 series are also made. This is a not a proper considered review, it’s just a hack’n’slash at playing around with it out …

Dave explains the Dickson Doubler building block circuit. a.k.a diode charge pump. Use a spare microcontroller pin, some diodes, and capacitors to create a useful voltage doubler or voltage multiplier. Podcast: Download

What’s inside the JBC CD-2BB soldering station. http://bit.ly/180GwAP http://www.mektronics.com.au/ Forum Topic HERE Podcast: Download

Fundamentals Friday Dave takes you through designing a signal overload detector circuit from scratch and then builds it up on the breadboard. Window comparators, schmitt inverters, capacitor charging, pulse stretching, common mode input range, tongue angle tweaking, it’s all here. Podcast: Download

What’s inside an $18K 20GHz handheld spectrum analyser? Rigol DSA815 teardown Tektronix MDO4000 teardown Podcast: Download

Here is an interview I did on usesthis.com: http://dave.jones.usesthis.com/ It’s about how I do the blog and some of the tools I use, for those interested.