Julian plays with: quick charge 2.0 usb devices
A quick play with the Aukey CC-T1 Car Charger and PB-T1 10,000mAh Power Bank which both support Qualcomm's Quick Charge…
Julian’s postbag: #43 – led driver, stepper linear actuators
Today's items of post: DC DC boost converter Constant Current Mobile Power supply 250W 10A LED Driver http://www.ebay.com/itm/-/321581704576 B-04E drive…
Julian explains: how arduino a/d converters work
A quick look at two ADC types - flash ADCs and successive approximation ADCs. Here I briefly explain how both…
Julian investigates: how slow is arduino?
Arduino is designed to be easy to use. But what penalty does that impose on instruction execution times? Find out…
Julian’s postbag: #42 – usb 3.0 power monitors red/yellow
Two fascinating USB 3.0 power monitors which have super accurate voltage, current and power measurement and some really neat additional…
Julian plays with: beethoven, bach and transconductance op amps
Having a little play with a CA3080E operational transconductance amplifier to give classical music some serious tremolo.
Julian’s postbag: #41 – ad9833 waveform generator
In today's post is a tiny Programmable Waveform Generator module based on the Analog Devices AD9833 This is what I…
Julian’s kit build: banggood 15 $23 oscilloscope update
More fault finding on Banggood's £15 oscilloscope - I'm now 99% convinced it's the LCD that's failed. http://bit.ly/1RzsbiM DSO138 DIY…
Julian builds: a split voltage power supply /-12v and 5v
In this video I take three old surplus switched mode power blocks and connect them together to make a split-voltage…
Julian’s workshop: qnap ts-231 nas web/file server upgrade
In preparation for my new website supporting my activities on YouTube, I'm setting up a new Qnap web and file…