Dennis Frie

- a couple of projects and pictures


(2013) (FPV) Lawmate mod (SAW upgrade and extra video output)

In order to get rid of some extra hardware (video-splitter and power splitters) i decided to mod the Lawmate video-RX a bit

First, the Lawmate receiver is disassembled.

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The RF-module is desoldered

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The casing is opened, to get access to the SAW-filter.

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A closer look on the SAW-filter that is replaced with the new one

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To add an extra video-output, the PCB is turned around.

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I never use the audio-output as it's terrible on Lawmate anyway, and decided to use the audio-output as a video-output instead.

A 75ohm resistor is soldered to the video-output transistor and connected to the audio-output, which have been disconnected from the audio-circuit.

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It's all fixed with hotglue, to make sure it stays in place

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At the power-input, the connectors are replaced with wires soldered directly to the PCB. Furthermore, an extra capacitors and an UBEC for my DVR is soldered on as well.

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- Again, everything is secured with some hotglue.

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The cover is isolated with some tape, to make sure there is no short-circuit (just call me paranoid)

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The finish solution with upgraded receiver, extra video-output for DVR and all wires soldered directly to the PCB.

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