Shared Projects by RVProject

This is the circuit board for the Super RV LED Dimmer, or the “Superman of Dimmers”.

A complete description, including BoM and construction details is available at http://www.rv-project.com/projects/linc5.php

RV Charger/Battery MonitorV1.4

The purpose of this board is to display the current state of a 3 or 4 stage smart charger (Equalization/Bulk/Absorption/Float) in a RV or boat, as well as monitor the state of discharge of a Lead Acid battery. This is a simple device using an Atmel ATTiny85, and can be used stand-alone, or in conjunction with a DC Voltmeter to monitor your RV’s charger and battery health.

For details, visit http://www.rv-project.com/projects/batterymonitor2.php

Plug suppressor board for the Hitch Power project. Construction details, video, Bill of Materials, and other details can be found at http://www.rv-project.com/projects/hitchpower.php

In-line surge suppressor board. Supports a fuse-protected surface mount TVS (Transient Voltage Suppressor) diode and status LED. Protects 12VDC 7.5A max circuits, such as LED strips, LED puck lights, Cameras, and similar items from voltage transients and surges. Clear heat-shrink tubing protects the circuit board from shorting out. Make these for less than $4ea (in multiples of 3).

WHEN ORDERING THE BOARDS, SPECIFY 2OZ COPPER!

Parts List

The transient suppressor board inserts between the 12V source and Load. It can be inserted either way, but by convention, the fuse should be towards the 12V source. The LED will be on if the surge protector is working. If it becomes damaged, it will blow the fuse, taking itself out of the circuit; in which case, the LED will no longer be illuminated.

The Transient TVS diode is selected so it does not consume any significant leakage current. You can increase the voltage rating of the TVS diode if you are concerned about standby current (for example, you are running off a battery). You could try a 1.5SMC24A (20V) or even 1.5SMC30A (24V). See the LittleFuse TVS datasheet for details.

Otherwise, the LED will consume approx 12mA at 12V. You can increase the resistor or leave the LED out if you are concerned about draining a battery.

When constructing the suppressor, pay attention to the polarity of the TVS diode and LED. The heat shrink protects the circuit from shorting out on something. I used clear so the LED would be visible.

All work is copyright by Creative Commons (BY NC SA) for non-commercial use only.

Surge Suppressor board using thru hole components for RGB LED strips. For details, see http://www.rv-project.com/projects/spark1b.php