Worried one day you will hook up your radio backwards and watch the magic smoke? Stop worrying with this reverse polarity board.Designed by 3rd Planet Solar / KC9ON in United States of America
What is it? Reverse polarity protection will protect your equipment when hooking up the power to it backwards. Why did you make it? I had an amateur radio which used the "reversed diode/fuse" metho...Read More…
Reverse polarity protection will protect your equipment when hooking up the power to it backwards.
I had an amateur radio which used the "reversed diode/fuse" method for reverse protection. Of course I'm 15 miles from civilization and hooked it up backwards with no spare fuse. There had to be a better way.
The RPP board is design to be placed inside a small radio or other piece of equipment. Since the forward diode method has a large voltage drop across it, and the reverse diode/fuse method pops fuses (see above), this board uses the P-MOSFET method which effectively acts as an open circuit when the polarity is backwards and much lower loss than a diode when forward. The board also includes LED's to indicate proper (green) or reverse (red) polarity.
There are 4 variations as follows:
Reverse Polarity Protection Thru-Hole Assembled - Fully assembled and ready to use using thru-hole components.
Reverse Polarity Protection Thru-Hole Kit - Kit contains all the parts (resistors, caps, diode, MOSFET, LED's,PCB, and Terminal Blocks) to create a fully assembled board. Some soldering experience is required.
Reverse Polarity Protection SMD Assembled - Fully assembled and ready to use using SMD style components.
Reverse Polarity Protection SMD Kit - Kit contains all the parts (resistors, capacitors, diode, MOSFET, LED's, PCB, and terminal blocks) to create a fully assembled board. This kit was designed as a beginners SMD project using larger 1206 sized components with good spacing in between. To help we even include 2x the 1206 sized components.
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