Okay I have tried this before with not much success in the General hardware sectuion (i think!) ans seen as it's a hobby I would I would put it in here. I know there has already been a popular DIY audio thread but this is intended for people to share all types of electronics (your current work?) and perhaps help each other out with projects. Please no stupid comments lets try to keep this good!!! Thanks.
********OcUK DIY Electronics Thread********
- Thread starter geowal19
- Start date
Ok, just to kick start things, here's a shot of one of my power amplifiers for my 3-way tri-amplified DIY audio system:
Symasym design with regulated rails held at +/-30V (LM338T regs) and increased bias for partial Class-A operation. Dual mono construction, relay power switching. All metalwork done by myself. This amplifier runs the tweeters in the setup, which require very little power (96dB sens), but it can provide 40Wpc if needed!
Symasym design with regulated rails held at +/-30V (LM338T regs) and increased bias for partial Class-A operation. Dual mono construction, relay power switching. All metalwork done by myself. This amplifier runs the tweeters in the setup, which require very little power (96dB sens), but it can provide 40Wpc if needed!
I've got several projects on the go at the moment, it's just finding the time to actually complete them. I seem to be good at getting ideas and starting projects but finishing them is more challenging. I'm a member of a Hackerspace called fizzPOP here in Birmingham and we meet up every two weeks to work on projects and just chat about stuff like programming, computers, technology, art and such. I've actually managed to complete a few projects since I started going to the hackerspace as it's a place out of the way to just sit down and work on them.
I completed a MintyBoost XL which is my modification to Ladyada's MintyBoost kit. I designed my own PCB and added two extra batteries to give it more juice to charge things like an iPhone 3G.
You can view more photos on Flickr.
Another project was an optical theremin. fizzPOP actually held a workshop where you could go along and build this kit from scratch. It was great fun and it makes lots of noise.
You can see more of the photos on Flickr.
I'm also a big fan of the RepRap/MakerBot projects and plan to get my own Makerbot in the near future. 3D printing and CNC machines are something that really interest me, probably because it involved making stuff, programming and computers. You'll probably see some posts from me regarding this within the next 3-4 months.
Aside from all this I have some work in progress projects such as an IR remote mod that will allow me to turn on my Xbox (original) via the remote. I am also playing around with an Arduino and an LCD amongst other things. I have tons of photos and information that I need to write up about my various projects, I just need to get time to put them up online.
I completed a MintyBoost XL which is my modification to Ladyada's MintyBoost kit. I designed my own PCB and added two extra batteries to give it more juice to charge things like an iPhone 3G.
You can view more photos on Flickr.
Another project was an optical theremin. fizzPOP actually held a workshop where you could go along and build this kit from scratch. It was great fun and it makes lots of noise.
You can see more of the photos on Flickr.
I'm also a big fan of the RepRap/MakerBot projects and plan to get my own Makerbot in the near future. 3D printing and CNC machines are something that really interest me, probably because it involved making stuff, programming and computers. You'll probably see some posts from me regarding this within the next 3-4 months.
Aside from all this I have some work in progress projects such as an IR remote mod that will allow me to turn on my Xbox (original) via the remote. I am also playing around with an Arduino and an LCD amongst other things. I have tons of photos and information that I need to write up about my various projects, I just need to get time to put them up online.
All of mine are here: http://www.hexoc.com/pages/electronics.php
Currently working on second high altitude balloon (Apex) which is an electronic payload of cameras and tracking/radio kit to take pictures of the Earth from near-space: http://www.hexoc.com/pages/apex.php
Currently working on second high altitude balloon (Apex) which is an electronic payload of cameras and tracking/radio kit to take pictures of the Earth from near-space: http://www.hexoc.com/pages/apex.php
Seeing as it's just completed today, I'll add this here:
Mini stereo desktop amplifier for uni. About 2x15W though probably less in reality due to quite minimal heatsinking. Full details here:
http://www.diyaudio.com/forums/chip-amps/168553-lm1875-miniature-desktop-amplifier-build.html
Mini stereo desktop amplifier for uni. About 2x15W though probably less in reality due to quite minimal heatsinking. Full details here:
http://www.diyaudio.com/forums/chip-amps/168553-lm1875-miniature-desktop-amplifier-build.html
When I was in college I designed a house alarm from scratch, it had 6 zones, infrared and ultrasonic detectors also a knight rider led warning thingy 
It was made using only 555 timers, nand gates, binary counter, transistors, resistors and capacitors. There where no programmable chips, it took several weeks with a logic probe to get it working, it was bigger than a motherboard.
It was made using only 555 timers, nand gates, binary counter, transistors, resistors and capacitors. There where no programmable chips, it took several weeks with a logic probe to get it working, it was bigger than a motherboard. 
When I was in college I designed a house alarm from scratch, it had 6 zones, infrared and ultrasonic detectors also a knight rider led warning thingy
Sounds awesome! My college project was just a remote control dimmable light
Running some tests on the new amplifier today, check for stability and anomalies
Oh go on then:
Here's my audio receiver. 24/96 DAC, headphone amp/pre amp, TA2022 Class D power amp. I never got around to getting a front panel properly machined up for it:
And my current project is an active pre-amp with tone, volume and source control and a graphical LCD display. This was last year, just messing around with I2C control of the display:
Here's my audio receiver. 24/96 DAC, headphone amp/pre amp, TA2022 Class D power amp. I never got around to getting a front panel properly machined up for it:
And my current project is an active pre-amp with tone, volume and source control and a graphical LCD display. This was last year, just messing around with I2C control of the display:
Good to see a few projects on the go. I normally have something partially built in the inventing cupboard. Normally analogue electronics for me, because that's as far as my intelligence can take me, so it's audio amplifiers, 555 timers, op amp circuits etc, and all mainly on veroboard as I eBayed my etching tank some time ago. Struggling to get traditional analogue components these days, sadly.
Did a very basic (and budget) iPod conversion on a dead Roberts Radio recently. Just made it out of bits I had in the box, which were an old car speaker, battery box, spare headphone lead and a TDA2822 amp on some veroboard:
I've done an identical conversion on my late grandfather's treasured wireless set. It was long dead but it's made a really good portable speaker.
I'm inheriting the guts from a very rare Bush valve radio at some point, which I'd like to use in a similar way. I'll probably separate the radio circuit from the amplifier and use it in another radio body, or maybe in the car.
Did a very basic (and budget) iPod conversion on a dead Roberts Radio recently. Just made it out of bits I had in the box, which were an old car speaker, battery box, spare headphone lead and a TDA2822 amp on some veroboard:
I've done an identical conversion on my late grandfather's treasured wireless set. It was long dead but it's made a really good portable speaker.
I'm inheriting the guts from a very rare Bush valve radio at some point, which I'd like to use in a similar way. I'll probably separate the radio circuit from the amplifier and use it in another radio body, or maybe in the car.