Julian’s project: eti vocoder – internal excitation oscillators
Playing with a couple of triangle wave oscillators. ETI Vocoder constructional project reproduced with permission from Wimborne Publishing Ltd. http://www.epemag.com…
Julian’s postbag: #39 – ad9850 dds, ad9833, pwm solar controller
Today's items from China Check out Upgrade Version PWM 10A Solar Charge Controller Regulator 12V 24V Switch TOP http://www.ebay.com/itm/-/400829866183?roken=cUgayN&soutkn=wzD4mf via…
Julian’s project: penny organ – how music works
After completing the penny organ, I have to select frequencies that sound musical. But what are those frequencies? Arduino code:…
Teardown: aukey apollo sk-a1 bluetooth speaker
A look inside the Aukey Apollo SK-A1 Bluetooth speaker. This small unit kicks out a lot of bass and has…
Overview: summer 2015 solar and outdoor projects
Time to review all my solar powered and outdoor projects and decide what work to do on them this summer.…
Investigation: are log potentiometers really logarithmic?
Wikipedia says that modern (cheap) log potentiometers aren't actually logarithmic at all, but constructed with separate sections of fixed resistance…
First look: apa102 rgb pixel addressable led #2
Part2 of my first look at the APA102 RGB pixel addressable LED
First look: apa102 rgb pixel addressable led #1
Part1 of my first look at the APA102 pixel addressable LED
Review/teardown: aukey lt-t1 led dimmable folding desk lamp
A review and teardown of the Aukey LT-T1 LED desk lamp. Has adjustable colour temperature from warm white to cool…