What a mazing about DIY your own rc micro_helicopter!!!

little tips about making rc micro_helicopter

Knit Motorcycle

Look this!

ANZAC DAY!

Today is anzac day. For me, the best thing is finding out treasures.

One car-used b/w tv, one flatbed scanner, they are all working correctly, even come with required cables and ac adapter.

Another thing did not go well. A canon 8mm camcorder, with all required accesories, even remoter, was broken due to my fault. I was too excited to wait the camcorder become totally dry. Along with ‘BANG’, something like a capacitor in the machine was blown. This is a good lesson for me to keep professional principles in mind in future.

With extremely luck, I found a discarded joystick! The following task is to modify it to be able to connect to my notebook computer, or try to find out a usable desktop pc (because the interface of joystick is the old pc style).

Arcade Joystick Controller

This one is a diy project, not repair.

Due to the busy daily life, it’s long time since playing computer game last time. The new games require more and more hardware power and time to play. Did you still remember the old fashion ‘1944′ or ‘AXE’ etc. famouse arcade game? They are exciting and time efficient. Unfortunetely, those machine have disappeared for a while.

Thanks for kinds of game emulator, it’s still possible to play them on modern computer now. The pity is, keyboard or modern joystick just would not give you the feeling in the beatiful old days. This is the motivation of this project, to make a old arcade style joystick controller to play old arcade games.

BTW: I’ll appreciate if anyone could tell me where I can find the arcade joystick and buttons. A discarded computer keyboard is needed too.

Photography techniques: How to build a tornado machine

Photography techniques: How to build a tornado machine

Bring the real tornado to your home!

Raffaello D’Andrea Interactive & Dynamic Art

Raffaello D’Andrea Interactive & Dynamic Art

Look at the Chair! It’s so cool!!

SUN Monitor works

Another good news today:

Utilizing a discarded D-link ethernet adapter’s shell, a 13w3 to VGA adapter was perfectly assembled;)

This adapter enable the standard pc to connect to this wonderful Trilliton 20-inches monitor. The point is, everything is free;)

Finally, TV was repaired!

Repired, then damaged again, repeatly…

The issue is not only the psu capacitors, the CPU is also reseted. This problem confused me a lot. On the reference schematic (same chassis, but different model), only a capacitor and a resister are connected to cpu reset pin. Even after cut-off these two components, the reset pin was still pull down. I guessed maybe the cpu is wrong.

After the final inspection (almost giveup), I suddenly found there is a new circuit is added to field driving part for protection, which will pull down cpu reset pin to prevent power on.

After checking, the field driver worked well, the only possible reason is the damage of protection circuit (Q40A). The protect line was cut, then everything works well.

I will not try another tv repair, what a pain!

Dead SUN Workstation Ultra 1

This kind of workstation is my dream when I first time saw them, let’s say 10 year ago. Last week I just picked up one set of ultra 1 as they are discarded. Unfortunetely, the power supply just turn off itself immediatly after I turn it on. Then I dettached everything, e.g. hdd, fd, cdrom, and all s-bus cards. This time the machine did not switch itself off. However, in every15 seconds (roughly), the power indication led and the speaker flashed several times, looks like the system was reseted. I checked all psu pin volts, which seems correct. I also tried to attach a console to serial A, but there is no any outputs.

Anyone has idea about that?

Dead TV (TEAC CTM685)

I pick up this tv when somebody else warning me it’s broken, since repairing is not too bad for me;)

However, this is just the beginning of my nightmare.

This tv is easy to be identified as psu failure since no picture, no sound, just dead. When I open the shell, a capacitor in psu was clearly exploded. However, I can not confirm the reason of breaking. After researching on the circuits for couples’ weeks (no schematics available), there should be the high esr of other capacitor in psu oscillator cause this problem. After replacing all these capacitors, wow, the psu HT and line rail are all ok again (cheers!). When I push the power switch in (and hold on!!!), the screen display noises as well as the speaker, all are fine. But when I release the power switch, the set just turn to standby automatically. It seems something wrong about the cpu or some protection are triggered.

Hope to be solved later.