By their nature all PCB developing/etching chemicals will be hazardous to some extent – e.g. corrosive; irritant etc. You should always wear protective clothing (even if it’s just to stop nasty yellow splotches from the ferric chloride on your clothes) and goggles. Always read the health and safety sheets before mixing or using any of the […]
Just watched the Gadget Show and saw these guys, I can’t beleive that all they use are modded toys (Jason was cheating a little with the mixing desk and the ipad I feel ) Here’s a link to the performance http://fwd.five.tv/tags/gadget-orchestra/videos Their website http://www.modifiedtoyorchestra.com/index.php and a YouTube video explaining what they do… I think a […]
COSHH Information on Ferric Chloride Uses/Processes To produce, by etching away unwanted copper, an electronic circuit board designed to meet a specific requirement. The prepared board is immersed in ferric chloride (iron (III) chloride) solution or sodium peroxodisulfate (persulfate) solution to etch away the copper. The board is sometimes cleaned with a solvent before or […]
Just thought I’d share this as I think they are one of the coolest robotics developments out there: AirPenguin – autonomously flying robotic penguins With the AirPenguins, the engineers from Festo have created artificial penguins and have taught them “autonomous flight in the sea of air”. For this purpose, control and regulating technology had to […]
These are my final design files for the outer case, inner case and the door: I’ve included holes to allow me to attach the PCB, buzzer, keypad and the LEDs as well as ports in the door panels to allow me to access the stereo PICAXE connector, for the battery cable and for the solenoid […]
To give a contrast to the acrylic case I decided to make a support structue out of aluminium, it would keep the inner case in place and also provide strength and stability to the outer case. As I would need multiples of the same items I decided to use the CNC lathe (H+S info here) […]
As the basic programme stands the safe lock resets after 5 seconds, this is not useful if you are taking anything out as you would have to re-enter the code to pull back the bolt to close the door. I need to be able to control the lock timing. I’d like to do this by […]
Now that I have all my pieces cut and temporarily fixed together (thank you masking tape) I need to return my attention to my wiring. The flying leads I used when first putting the keypad together are far too long and are made from single core wire making them very stiff and prone to breaking […]
Everything has been cut and and I’m ready to start construction, first step, have a practice run… All the pieces slot together so I can construct the box and check any fit issues without needing to glue anything. After extending the battery cable I realised that I have not allowed space for the on/off switch, a […]