Hi all,
I'm building a prop for a childrens event. It's a sort of fake decoding machine. When a card (with an irrelevant code on) is slid into a slot I want it to open a switch and turn on 3 LEDs inside a box, while simultaneously turning off an LED outside the box. I want to run it from a battery (9v?).
Here is a summary of the functions:
http://www.flickr.com/photos/61496548@N03/8675815551/
I have googled around and have come up with the following solution:
http://www.flickr.com/photos/61496548@N03/8675813959/in/photostream/
Is this a good solution?
Can anyone help me calculate the resistors/ tansistors needed?
I need to produce this quickly and cheaply and I'm going to solder it all up with my own inexpert hands (not literally - I don't have soldering-iron-fingers or anything)
All help much appreciated
I'm building a prop for a childrens event. It's a sort of fake decoding machine. When a card (with an irrelevant code on) is slid into a slot I want it to open a switch and turn on 3 LEDs inside a box, while simultaneously turning off an LED outside the box. I want to run it from a battery (9v?).
Here is a summary of the functions:
http://www.flickr.com/photos/61496548@N03/8675815551/
I have googled around and have come up with the following solution:
http://www.flickr.com/photos/61496548@N03/8675813959/in/photostream/
Is this a good solution?
Can anyone help me calculate the resistors/ tansistors needed?
I need to produce this quickly and cheaply and I'm going to solder it all up with my own inexpert hands (not literally - I don't have soldering-iron-fingers or anything)
All help much appreciated