When your electronics get hotter, the risk of failure increases. Here is a circuit that will keep those electronics from overheating.
This electronics cooler uses a fairly simple electronics cooling setup to ensure electronics don’t overheat and fail. In this schematic, there are two transistors used as constant current sources that deliver about 300mA of current into the nichrome wire (or metal alloy heating element), which then gets dissipated out to heat the area around it. To protect the wiring between the power supply and nichrome wire, I’ve chosen to use 10-ohm 5W resistors for each transistor Q1 & Q2 (I’m using 2N3904s). If you find yourself wanting more or less current, you can use a variable resistor as R1 to adjust the current.
Another concern is the electronics cabinet cooling. If your electronics are going to be in a confined space, make sure there is some sort of electronics cooler on them. I’ve done a previous post here about using simple electronics cooling fans for this purpose. Also, make sure to read through our guidelines on electronics safety.
For more detail: Simple Linear Electronics Cooler Circuit with Easy Calculation of Temperature Rise from Heating Element Current.Electronics Cooler When your electronics get hotter, the risk of failure increases.
This is an attempt on making a compact portable external power source for all your USB devices, i.e. iPod, PSP, mobile phone, etc. It’s kind of like the Powermat but without any transmitter or receiver mat and it works through a 12V DC current(cigarette lighter).
The design uses a switched-mode power supply that steps up the voltage from 12 to 19 volts and charges one or more USB devices thru D2PAK MOSFETs with pulse width modulated signal generated by PIC16F628A. The circuit can be designed in almost any small plastic container(the one I used was from Sanyo) which will keep all components secure inside while making protection against any short circuits easier because of its insulating properties.
The schematic and PCB design were created in Cadsoft Eagle(free download) software, while images on this page are generated with help of Fritzing. [ARTICLE END]
NOTICE: The article was originally submitted to Instructables but they rejected it for some reason! 🙁 I’m so annoyed right now…
I hope it will be published elsewhere soon. Subscribe or follow me on Twitter or Google+ to get notified when the next part is live! Or just check out my blog – you might find what you’re looking for there:). Thank you and peace out!=))
PS. If somebody knows how to submit an instructable properly please let me know in the comments! It would be highly appreciated!