Infra-red remote control tester

Is the TV broken, has the TV software stopped responding or is it just that the remote controls batteries have gone flat again? This little paper circuit will test if your remote control signal is being sent and therefore whether the batteries are still working. You can easily fit this one inside your logbook for Read more about Infra-red remote control tester[…]

LED lamp dimmer with a 555 timer and comparator

I wanted a simple bedside lamp with a continuously variable brightness. Something I could read from whilst also being able to dim the lamp in an analogue manner to a level where it could be left turned on over night so that I could see the baby but not wake him in his Moses basket. Read more about LED lamp dimmer with a 555 timer and comparator[…]