The inside of your modern domestic light bulb.

Went to do my bit for our Lincoln u3a photographic group today. where we had an open day promoting many of the groups. I had  quite a few enquiries but no takers. However I ended up talking to many people about music, choirs and instruments  :-)
I also won an interesting tin of biscuits in the raffle, the tin is an excellent reproduction of a cassette recorder, very clever and very realistic, could be a blip one day :-)
I do have an interest in circuit boards as I used be a printed circuit board layout engineer, this was on the green doctor stand looking at how to save money on energy bills. .Thanks  to pinkhairedlady for hosting tiny Tuesday.