Thursday 30 April 2020

Insomniacs Bedside Radio: signal to noise ratio

Raspberry Pi audio projects can be prone to noise issues.

I don't use our bedside radio very often, but when I do, I notice background noise.

I've finally got around to doing something about it.

Monday 27 April 2020

BirdBox 2020:'s been a funny old month!

There has been a lot of traffic in our maple tree bird box during April.


We've seen trespassers, thieves, and changes of ownership.

So guess who our current tenants are?

Tuesday 14 April 2020

Re-discover the Night Sky #2: stacking images in Gimp

Stacking time-lapse photos of the night sky allows you to create 'star-trail' images.

It is possible to get good results using Gimp by selecting the appropriate layer mode.

This post also describes how I hacked one of the existing Gimp scripts.

Sunday 5 April 2020

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.