October 21 & 22, 2017
October 22, 2017
Nearly Every Weekend
Use a 555 timer to make an LED blink like the one in a security camera.
I got all the parts necessary for the project at my local RadioShack. You can get them cheaper somewhere else, I’m sure.
Here is it finished. I made this one about a week ago to test the circuit. So this one may differ a bit compared to the one we're going to build.
Here are the parts needed to complete the project.
Here is the schematic for the project.
Next we add the 10uF capacitor. Be aware of its positive and negative leads (negative should be facing down if the terminal is at the top).
Next come the rest of the resistors. The first is the 10k which goes closest to the capacitor. Then the 470 and 220 are joined together in series to make the equivalent of a 680k.
Solder all connections made so far.
After soldering all connections cut off the extra leads except for those on the capacitor and resistor.
Next connect pin 7 to the spot between the 10k and the 660k resistors.
Connect pins 6 and 2 together and then to the spot between the capacitor and 10k resistor.
If you connected everything correctly, connect your battery to the circuit and let it sit for a couple of seconds. It should start to blink every 5 seconds. If not, check for short circuits or misconnected leads.
If you have any questions or comments please post them and I will help with what is possible. Or, email me at [email protected]
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