Triggering the Sing-A-Ma-Jig with a 555

by Jimmie on February 10, 2011

Wow, just wow. The 555 worked like a charm. I didn’t even need a transistor for it, which I mentioned in the previous post. I used a simple 555 timer to get it to loop. Turns out that Btn1 just need to be dropped to ground, and then it signals a button press. Luckily, the 555 output was designed to either sink or source current, so it can be used directly without a transistor.

This thing is so fun. You can even listen to me playing with it. Seriously, this thing is going to be great.

I’m using a TLC555CP from TI, which starts with a voltage as low as only 2v! What that means is that I can power this off of my 3v toy. My favorite page for basic 555 information is located here. I’m using the astable configuration with a greater than 50% duty cycle.

IMG_0438 I’m going to do a proper post on this later to fully explain what all this is doing, and how to use it with other toys. For now I’m having fun playing with it. I’ve also done three blog posts today, in short succession. I’m going to go and grab some food now, then I’ll probably do up a proper schematic in Eagle. I will probably do a PCB for this as well, since it’s extremely useful. I’ll actually submit that for the 555 contest.

Here are a few pics of the circuit:



{ 2 comments… read them below or add one }

1 sly October 19, 2012 at 12:51


2 Inflatable mascots .com November 7, 2012 at 12:33

Nice woerk

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