I’m an #privacy, #opensource, #opendata and #openstandards advocate. I’m holding a grudge against Big Tech, big IP holders and authoritharian governments. Furthermore I’m a #3Ddesigner, #3Dprinter, #webdesigner and overall #DIY guy.
As described in my last post I’m building a streaming media box running Kodi. I finally received the components I needed to complete the build (together with the motherboard, 4Gb memory and a Celeron G1610 processor that I had spare). As a case I chose the LC-1410mi from LC-Power. It’s a small black case with […]
Two years ago I started using XBMC (now Kodi) to stream video and audio into our living room. At the time I had a spare laptop (an Alienware X11 revision1) with Windows 7. I installed XBMC/Kodi on it and I streamed video to my television set. The audio is streamed through my Pioneer VSX-S300 slim […]
I finally reached the second stage of Experiment 29 of Make: Electronics. In the first stage I used an audio amplifier (TEA2025B) and a coil to create a crossover network. During this first stage the source of the audio was an iPod (read here). In the second stage the iPod was replaced by a 555 […]
After upgrading my sons PC (see my previous blog entry) with a AMD A10-7800 processor and a AsRock FM2+ motherboard we downloaded the Steam client and played two games: Left4Dead and Kingdom Rush. Especially during Left4Dead the temperature of the computer case felt uncomfortably high but we didn’t know how high. I do know however […]
With kids growing up their PC performance needs change rapidly. My son has a small PC that served him well for a couple of years. It had a Celeron (1610) processor, a MSI B73MA-E33 mini-ITX motherboard, 4Gb of DDR3 RAM and a 1 TB HD which fits nicely in a LC Power computer case (1400mi). […]
A small update on the filtering experiment 29 of Make: Electronics that I wrote about earlier this week. To improve audibility especially of the lower frequencies I had to built an enclosure. The book proposes a plastic box but I had a shoebox made out of cardboard lying around. I cut a circular hole in […]
Finally, after earlier setback, I’ve got the amplifier and 4-inch speaker working properly. I tried multiple setups today and managed to get rid of the distortion. The book dictates 9V, 33K resistance on audio input. This results in my case in a temperature of 90 degrees (194 fahrenheit). Which is uncomfortably high. I therefore decreased […]
This experiment of Make: Electronics demonstrates the use of self-inductance and capacitance in audio filtering. The low and high frequencies of the audio signal can be separated and send to different speakers (woofer and tweeter). The audio chip used for this experiment is the TEA2025B, a somewhat older chip that was used in portable radio […]
I finally finished the Darth Vader voice changer this weekend. I took a belt with two snap hooks from an old bag. Next I fitted the box with the voice changer with two black screw eyes that were large enough for the snap hooks. The enclosure is now comfortable around the neck of a child. […]
I received 50 TEA2025B amplifiers over the mail today. I ordered these IC’s about two weeks ago at Aliexpress.com. Aliexpress is an affiliate of Alibaba. I have never ordered components from Aliexpress before and I was curious to see how they would perform. Eager to get my hands on these OpAmps I quickly unpacked but […]