13.8VDC Polarity Protector
Several members of group have had the horrible experience of accidentally connecting up a battery backwards and destroying an expensive radio. This little circuit was designed to use MOSFETs to prevent power reaching the radio if the input polarity is accidentally reversed. The power MOSFETS cost only about $3 each, and 2 of them will handle VHF mobile radios (50 watt output class); 4 of them will easily handle a 100W HF radio. We overdesigned this to avoid needing heatsinks and reduce voltage loss. There are no guarantees or warrantees but this circuit looks like a winner!
13.8VDC Polarity Protector
*PCBWay community is a sharing platform. We are not responsible for any design issues and parameter issues (board thickness, surface finish, etc.) you choose.
- Comments(0)
- Likes(3)
More by Gordon L Gibby
-
K3NG Rotator Dual Axis Controller Board
This is a printed circuit board to allow use of the K3NG rotator controller for one- or two-axis rot...
-
Arduino Winkeyer Emulator Based on K3NG code
This project allows you to build a working WINKEYER. See the enclosed MANUAL which includes both ...
-
Ham Radio Butterworth BandPass Filters
Can be used to build Butterworth filters such as those from this article: https://www.arrl.org/fil...
-
Heathkit SB-100 101 102 / HW-100 101 MODE SWITCH REPLACEMENT
Uses 2PDT miniature relays from AXICOM (150mW 12V relay) to replace the unavailable Heathkit MODE sw...
-
13.8VDC Polarity Protector
Several members of group have had the horrible experience of accidentally connecting up a battery ba...
-
-
-
-
Tester for Touch Screen Digitizer without using microcontroller
230 2 2 -
Audio reactive glow LED wristband/bracelet with NFC / RFID-Tags
237 0 1 -
-
-
