Check out this cool etch CNC. Actually we were thinking of making this too, but since it’s already made, we can learn from it and make it quicker. Awesome! 🙂
I am using a retrofit machine that fit within my budget. It’s a 2-axis machine with approximately 170x130mm travel.
The circuit board is my own design, using a ULN2803 per motor to supply approx. 0.3 amps per winding. The power supply is a standard AT hard-drive power connector, with the +12V used to power the
Here’s a cool oxygen sensor simulator via hackaday for those of you who need to build some custom control system for your turbo, nitrous, super-charged engines. I used to have a car that I put a turbo-charger on it. Well, I had this really crude fuel oxygen control management system using couple vacuum tubes, but this hack could be good for thos
ZikiWiki is a technology wiki I created for technology. Well, right now I am just posting some stuff for my work but hopefully, it will get bigger and bigger and become a free useful tool for diyers, hackers, engineers, and etc… Right now it’s in beta testing period, so if you need a place for your information organization, this might be a good place to start.
I thought about how restricted wikipedia was becoming, it’s like a free place that’s not free anymore, but here’s a wiki that is free,
Here’s a cool car battery charger diagram.
This very simple circuit uses a transformer ,two diodes , a capacitor and an ammeter. To charge a battery just connect the + and – terminals of the circuit to the corresponding terminals of the battery. When the battery is not charged, the ammeter reading shows 1-3 amps. When the battery is fully charged the ammeter reads Zero or nearly zero, after which the battery should be removed from the charger.
Here’s a circuit for velocity monitor for paintballs using a PIC microcontroller. [via] designnews
