So I was thinking about doing something with lasers for a while now. So I’ve bought a cheap laser pointer from eBay. Then i’ve attached a mirror to the remaining parts of an analog meter. By using a Simple amplifier (TDA2822) I was able to make the mirror move. Now I’m thinking about adding a 2nd mirror/ meter assembly. And maybe writing a program in phyton to spell text in the air. I’ll add some video’s in this post, that you can see how it moves. And well, I think it’s awesome!
So If you have been following me on Twitter. I’ve posted that I was going to assemble some PCB’s. Well here they are. But for what are they? Well this has been an ongoing project for a while now. As you may or may not know, my parents own a modeling/ die-cast shop called Art-Toys And they sell and even customize die-cast cars. Now you may wonder what does that have to do with this PCB? Well this is a PCB to control led’s, to make them blink in a certain way or pattern to mimic real life situations.
Why did it take so long? Well, I goofed up a few times on the design. even abused a voltage regulator.
So yeah there finally done. This PCB is open source, and the hand drawn schematic can be found here.
So I think I have my work cut out for me.
Here are some more images from the PCB’s.
You’ve may noticed a lot of broken image links and post’s not showing up.
Well this is a problem i blame in WordPress V4.1, Why?
Well, let me explain. I used to store my media files (images, video’s, etc…) on a subdomain img.ashleyslab.co but as it turns out I had to reinstall WordPress completely, since I kinda goofed up. So yeah. I’ve looked a gazilion times in the “media” settings and in the wp-config.php files. But I can’t seem to find where those settings are in Wp 4.1.
Do You know how to help me?
Then please let me know, since I would like to fix this problem.
So if you’ve seen the comments on the Makible Facebook page lately. Chances are you’ve seen the link to a site called Makiboxclearance.co.uk.
So wait is Makible selling the Makibox that you’ve payed for?
No, there not. This site is operated by a Company called China European E-Commerce LTD.
they were the shipping partners from Makible. And they took the printers as payment.
So that’s what there selling now.
So yeah, No money I guess.
well, I’ve looked on the site and found a UK address:
Harricomms UK LTD
Now they have more than one company with that address.
I’ve tried to send tem an email “asking” (kinda in the not so nice way) about the 3D printers. Since now their the only ones reachable
And I’ll try to call them for sure as well.
To Be Continued
This is a simple CC (Constant Current) Driver. Only existing from 5 components: 2 1N4007 Diodes, A 10K resistor, A 39R* resistor and a BC547B. So basicly 2€’s in parts. And as you can see it’s very tiny. Try to imagine what a All SMD version would look like.
I’ve made a simulation in Yenka that can be downloaded here So you can simulate the circuit and choose a resistor value that would meet your needs.
Yenka can be downloaded from Here
And this is the finished module.
The 10$ DVBT(r) just looks like any other USB donge. But In reality this Dongle is more capable then described. With some Free software (called RTL-SDR) You can easily turn this Dongle in to a very cheap Spectrum analyzer. I had a play around and its a great Low cost tool to get started in SDR (Software Defined Radio) And it’s also a great way to troubleshoot you’re wireless projects.
There is only one thing. Not all the signals you see are the ones there actually are. Since this ting is designed as a consumer/ low cost tool. The RF design is not as good as a 9,899$ Spectrum Analyzer (which is normal). If you are going to use this a lot. You might want to remove the IR recever and the High brightness Blue LED. And put the whole PCB in a die-cast box and while you’re doing that add some ferrite beads(?).
So let’s show some interesting screenshots and signals.
This audio clip is from a wireless doorbell I own. This model of doorbell transmits on the ISM (licence free) band. @433 Mhz
This is a cordless phone that transmits from 470MHz to 478MHz
There are a few more interesting Frequencies.
A VW car keyfob transmits @434 MHz, GSM @900- 915 MHz, Pal Tv 60 MHz, The Belgian network for Firemen and rescue @ 196.625 MHz (can vary a bit)
The 433 Mhz band is the most interesting in my opinion since there are so many wireless products that use that frequency. For Example: A wireless doorbell, A wireless plug, a wireless Alarm And so many more. Even those Arduino RF links are on 433 MHz.
The Stick is available on Ebay for 7,99$ (click here for more info)
The Software is available for download (here)
More information about Software Defined Radio (can be found here)
Have fun exploring the wonders of RF and Software Defined Radio (SDR)!
Part 1: The Not So Happy Ending.
So My Macbook’s charger has bitten the dust. It suddenly stopped working. Ok, so it didn’t completely died but it had a weird “ticking” sound (watch video1)
Ok, good and well Let’s hook up a scope to have a look at the output.
Ok well. That doesn’t look like a Normal DC output of 16.5V DC. So first I thought the Ticking sound was a sort of ach over. So I looked around while letting the Psu being plugged in. I saw no arch overs. So what the heck could it be? Ok So I had a look around on the PSU and I saw a Fet. great there was a control IC connected to the fet’s gate pin trough a series resistor. Then I thought let’s put my scope in the gate pin to see what comes out. Once I did that This is what I saw.
I couldn’t believe what i saw. It just started working! Great I let my Mac get a full charge. I also applied some new solder (or sodder for you Americans) to the control IC.
Ok. so end of the story and a happy ending.
Nope, it wasn’t. When I put the main PCB in a new enclosure it made the ticking sound again. So I need to figure out if it’s the driver chip or if it’s something else something far more complicated. So yeah. Let’s try to figure out whats wrong with this PSU.
If you got any info. or have any advice on what i could be. Please let me know!
Well first What is FLUX?
Flux is a liquid (can also be in a spray or gel form. And Rosin based flux is original in a stone like form) that helps Your solder tin flow. Help it flow? yes, It will clean the to solder surface and bring the junk to the top. And bring the solder to the bottom . And that’s how it can make it flow better.
Sounds like the best thing ever since sliced bread! Not? Well, actually Rosin based flux has the disadvantage of making you pcb “Dirty” In that way that when The Flux has done its job. it will get dirty since it has taken up the dirt/ oxidation. And It will stick on the PCB.
Thats where you have Flux cleaners like Flux-Off (R)
It usually comes in these types of Spray cans and is usually very inexpensive.So what does this thing do? Well it will basically soften the Hardened dirty flux rests and then with the brush you can remove it from the Pcb.Here are a few comparison pictures where you can see what flux-off(R) does.
Not cleaned. You can clearly see the brown Flux residue.
Cleaned. You can clearly see that the Brown residue (gunk) is gone.
So that Sounds great! Can I eat it? Oh, No. Don’t do that Flux and Flux cleaners like Flux-off(R) Are really toxic. You are not going to die from them. But you will be sick for sure.
So where can I buy this?
Makible: And the struggle to get your own Money Back.
On 20 January 2013: I’ve placed an order By Makibox.com for one of their 3D printers. There was a delay but ok. I could live with that. April 2014: Well still a waiting game, I was losing patience and Emailed them to ask for a Written statement of the exact dilivery time Or to give my money back. I haven’t received an answer since. So I called PayPal To ask for a refund. And they told me ” Since the bought is older than 45 Days we can’t help you” May 2014: I’ve tried to contact Makible again, I’ve send them an email telling them “You have 14 days to answer or we will start a Legal Battle with you” But as you may already know the answer. There wasn’t one I didn’t start a legal battle since it only coasts money. And no one benefits from it. July 2014: I’m going to try to contact them. I’ve found 2 phone numbers one from Makible HQ and one from John Bedford. So yeah I’ll give them a ring tonight and have a listen on what they have to say. And hope to resolve this problem “friendly”
Well It was a success!
Here is a screenshot of our Hangout
It was really awesome!
We had people joining from around the Globe!
And yeah, Isn’t it wonderful to see people connecting. Coming together. And having a blast. While Making And having a great time.
Hope to see you There as well