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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

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

7 Channel relay board for ESP8266 (Wemos D1 mini)

The Open Panzer Sound Card is a work in progress with the goal of bringing inexpensive, high quality, and open source sound functionality to RC models but especially to tanks using the Tank Control Board (TCB). The board is actually made up of two components. First, an off-the-shelf PJRC Teensy 3.2 is used as the onboard processor. The Teensy is then plugged into a socket on our custom carrier board that adds a Micro SD card slot (max 32 GB), a Maxim 9768 10 watt mono amplifier, and headers for external connections.

Changes in Version 2 include a 10 watt amp (up from 2.6 watt in V1) and a reverse polarity diode on the voltage input.

Resources

• GitHub Page
• A discussion thread on the development of this card can be found on the Open Panzer Forum.
• Eagle Board and Schematic (zip)
• Printable Schematic (pdf)
• Bill of Materials - PDF - Excel

Version 2, updated 2/3/2018

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EMF Detector http://www.instructables.com/id/Electromagnetic-Field-EMF-Detector-With-LM358/

BOM: https://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=5a3e4ae018

An Adafruit Featherwing expansion protoboard with Sparkfun Qwiic connectors

https://github.com/hongselectronics/Qwiic_Featherwing

Dual surge suppressor board using TVS diodes. For more information, see http://www.rv-project.com/projects/surge1b.php

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Commodore 64 Final Cartridge III + from https://s-o.webnode.cz/vykopavky/c64/

p9813 LED power distribution board