AllSky: new box, dark frames & other tweaks

When conditions allow, I've been having fun with Allsky.

What started because of a meteor shower, has become a wider interest in things in the night sky.

And I've been tidying & tweaking my system.

BirdBox 2021: tits, robins & wrens

Its been a strange season, and no mistake.

The cold weather, early on, seems to have delayed everything.

And we have seen at least 4 things we have never witnessed before.

Re-discover the Night Sky: star trails

With an improvement in the weather, I thought I'd try a bit of night-sky photography.

One thing I've never attempted is taking time-lapse photos and then stacking them to produce star trails.

I used a RaspiCam for the photos and Gimp to stack and process them.

BirdBox2019: great tits & robins

Unlike 2018, we haven't had the excitement of birds being evicted from their nest [so far] this season.

Developments in the 'maple tree' birdbox are continuing as you may expect.

But we do have the added interest of robins nesting in an old analogue camera box.

Newts, hedgehogs, bats & BirdBox2019

I wasn't really prepared for this spring.

There was too much going on inside the house for me to be able to keep an eye on the garden.

Fortunately, time waits for no man...

BirdBox 2018: time-lapse video

For 2018 I thought I'd try to gather periodic snapshots from my Maple tree bird box.

The idea is to make a series of time-lapse videos.

I'm hoping to capture nest building and maybe show the chicks growing from tiny naked blobs to fully feathered birds.

Chicks at play: RaspiCam 90fps

Our blue tit chicks came out of hiding a few days after leaving the nest, and now they are regular visitors at our feeders.

They need to learn the snatch-and-run technique, rather than spending too much time out in the open where they are vulnerable to predators.

Using a RaspiCam to capture video at 90fps results in slow-motion video and gives a better idea of their behaviour.

BirdBox2017: end of another season

It's been a very successful year for our blue tits, great tits and our two Raspberry Pi powered bird boxes.

The last of our bird box chicks left the safety of their nest yesterday, and so ends another season for us.

Out of 15 eggs in two boxes, 14 chicks got the chance to explore the world outside and potentially become food for sparrowhawk chicks or maybe the short-term plaything for one of the local cats.

BirdBox2017: something is eating my SD card

2017 is turning out to be a great bird box season for us.

Both of our Raspberry Pi camera boxes are occupied, with the first set of chicks almost ready to leave the nest.

For the last few days my only concern has been whether I'll run out of SD card space before the chicks depart.

Gambas MP4Box: a batch .h264 to .mp4 video packager

Using RaspiVid software with a RaspiCam results in a .h264 encoded video file.

Most media players require .h264 to be "packaged" into a suitable video container format like .mp4.

This very simple Gambas project uses the program MP4Box to convert or package a bunch of .h264 files into .mp4 files ready to be edited or played using popular applications.

BirdBox2017: a few problems

This system was deployed just over a month ago and has been visited by blue tits almost every day.

It is basically doing its job by recording lots of video clips of both the inside and outside views of the bird box, which is mounted on the side of our pergola.

However, it does have a couple of problems that are rather annoying.

BirdBox2017: double Zero deployed!

I attached the new bird box & external camera to our pergola late yesterday afternoon, and by 8:30 this morning we had our first visitors.

Blue tits are very inquisitive, and certainly do not require a couple of months to get used to a new box (as some tv experts would have you believe).

So the 2017 season appears to have got off to a good start!

BirdBox2017: using motionEye & streamEye

After a couple of weeks of investigation, procrastination and frustration, I think I have reached a decision.

I am going to use motionEye to stream and display video to a remote laptop.

But this has meant a lot of upgrading to the heart of (what was) my 2015 bird box.

BirdBox2017: a new year, a new birdbox?

Well, not exactly. No plans to build a new box, but I would like to add a second camera.

As well as the main event inside the bird box, there is often quite a bit of action on the outside, especially during the early weeks, and at the end, when the chicks fledge.

So with only a few weeks left until I need to deploy my two Raspberry Pi powered bird boxes, I need to get on with development.

Pi Zero: adapting the USB socket

Although the Raspberry Pi Zero is about half the size of a credit card, the connectors stick out sideways, which affectively increases the boards footprint once connected.

To make matters worse, the USB socket is the micro version, so you need an adaptor if you only have a standard USB wifi dongle.

So in order to make a really small, headless Zero system, you need to do something radical.

BirdBox2016: the odd couple

From previous years, it is generally the first 10 days of April when nesting tits complete their nests and the first eggs appear [at least in our garden].

A pair of blue tits took over our Maple Tree bird box early in March, and have been visiting regularly right through the last 4 or 5 weeks.

However, their behaviour has not been typical from our experience of observing via box cameras since the start of the 2009 season.

BirdBox2016: the role of the Picaxe

As 2015 gives way to a new year, so its time to ready those bird boxes for the coming nesting season.

My original 2014 Raspberry Pi box remains unchanged, although it will be sited higher than previous years, this time maybe 3 metres up the trunk of our Canadian Maple.

But last years (2015) Picaxe + Pi box has undergone a few more changes, so maybe this is a good time to mention them.

BirdBox 2016: fitting the UV LEDs

Although initial testing with a bunch of UV LEDs did not look too promising, I've decided to push ahead and fit them to a bird box anyway.

They were very cheap, and I'd like to say they were easy to retro-fit into last seasons bird box.

But a wiring error resulted in a blown Darlington driver, so it took up more of my Sunday afternoon than I'd expected.

BirdBox 2016: sexing blue tits

In England, if you put up a bird box with a small entrance hole, the most likely species to make use of it is the blue tit.

So how do you tell male from female? Chances are you won't be able to.

But blue tits don't seem to have a problem picking a mate of the opposite sex. How do they do that?

How many bits in a RaspiCam lens?

I've never really thought much about the Raspberry Pi camera lens.

They are very small, just like the ones in my Sony mobile phone.

But if I'd been asked what they consist of a couple of days ago, I'd have probably said...