Dash Cams

Buy one. Seriously.

Install it so it turns on and begins recording whenever you start the car.

It needs to have as much view of the road as possible with just the front of your vehicle in the frame — nobody cares about video of the sky; there aren’t any cars up there.

Check it periodically to see that it’s working.

Remember: out of sight, out of mind.

And, a couple of things you’ll need to do to cover your own ass, legally:

  1. Turn off the ability to record audio. Seriously. If you’re using it to capture the actions of others, then disable the ability to also capture your own comments — remarks you make will always be self-incriminating. And in several places, audio recording falls under evesdropping or wiretapping laws.
  2. Don’t ever get into a verbal altercation with somebody else and “threaten” them with facts that they simply don’t need to know. For example, pointing to the dash cam and exclaiming, “This is on camera!” Don’t advertise that it even exists.
  3. If you intend sharing anything “as evidence”, you’ll need to ensure you save that particular clip, in its entirety, unchanged and unedited, until the statute of limitations for the alleged offense expires. How long is that? Well, it depends on the alleged crime. But for the rest of your life is a real possibility.
  4. If you at any time feel the need to delete potentially self-incriminating videos… don’t. Seriously. Look up “spoliation of evidence”. In several locales, it falls under “destruction of evidence”.
  5. A dash cam is as much a silent witness of somebody else’s actions as it is a witness of your own actions. It’ll see other people driving dangerously just as easily as it’ll see you doing the same. I suppose the takeaway would be: don’t drive like an imbecile.

Oh, and I’m not a lawyer — but ignorance of the law is no excuse.

This has been a public service announcement.

Getting a bit more challenging…

My soldering is improving.

This is a DSO 138 Oscilloscope that I assembled from a provided combination of discrete parts. The purveyors only ensured two required SMD* chips were factory-attached.

At the US$22 entry price, including the housing, it was a fun and affordable project.

If you take one of these on as a project, be sure to do its calibration before assembling into the housing.

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I’m sure there are also 3-wire or 4-wire probe combinations that I can add on in the future.

Next: Maybe I’ll start on a QRP-Labs QCX transceiver and see about obtaining a CW paddle… or maybe just turn it into a WSPR beacon.

*SMD chips are so small that they are often beyond the ready ability of most kit-builders because; they’ll require specialized special equipment to make them visible and differing soldering techniques.

What in the hell could it possibly be???

The latest assembly from Casa de Juan;

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A zap-o-matic? A high-precision random-number generator? A molecular stun-gun?

a 50-Ohm dummy load for testing transmitters up to 20w output to minimize the risk of

  1. transmitting a signal; and
  2. burning up a transmitter while not hooked up to an antenna

It’s effectively a sandwitch of small PCBs surrounding resistors along with an appropriate capcitor and diode to smooth out the signal while testing.

Yep, the soldering work still needs some improvement. Like the last project, I’m actually rather impressed that I was able to make it work as expected.

And next time, we’ll do something a bit more challenging.

Technically correct…

Whenever I see wordy output or excessive logging data, I’m reminded of that old joke about a Microsoft Engineer vs. a pilot.

It’s thorough, complete, and technically accurate… but completely useless.

Found originally back in the early 1990s, reworked/reworded over time, pasted here for posterity, and because I don’t want to go following dead links again:

A helicopter was flying around above Seattle when an electrical malfunction disabled all of the aircraft’s electronic navigation and communications equipment.

Due to the clouds and haze, the pilot could not determine the helicopter’s position and course to fly to the airport.

The pilot saw a tall building, flew toward it, circled, drew a handwritten sign, and held it in the helicopter’s window. The pilot’s sign said “WHERE AM I?” in large letters.

People in the tall building quickly responded to the aircraft, drew a large sign and held it in a building window. Their sign read: “YOU ARE IN A HELICOPTER.”

The pilot smiled, waved, looked at her map, determined the course to steer to SEATAC airport, and landed safely.

After they were on the ground, the co-pilot asked the pilot how the “YOU ARE IN A HELICOPTER” sign helped determine their position.

The pilot responded “I knew that had to be the Microsoft building because, like their technical support, online help and product documentation, the response they gave me was technically correct, but completely useless.”

It’ll Do…

The transceiver is fitted to the Altoids tin, and there’s sufficient space to include a battery as well.

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I’ll need to fit the removable jack for the antenna, and wiring harness for the battery, but I think it’s turned out rather well so far.