Julian looks inside: x-sense carbon monoxide/smoke alarm
A quick look inside a smoke and carbon monoxide detector which has two separate sensors. The smoke detector is an…
Julian upgrades: st uc firmware for yzxstudio usb monitors
Upgrading the firmware on the Red and Yellow YZXstudio USB3.0 Power Monitors. This done using a ST-LINK V2 microcontroller programmer…
Julian reveals: secrets of the pwm5 – #1 inspiration
New series revealing secrets of the PWM5 solar charge controller. Soon to become an open source project, I can now…
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.