Originally the idea was to go for a 650k ohm resistor and a 150k ohm resistor with a 100uf cap. This of course was no good as my first ever electronics pile (thank you ebay) did not include those exact values, thus I basically just kept trying combos to see what worked. It is on for a few seconds and off for not -exactly- a minute but it’s extremely close–within a few seconds. It’s a purposeful design in order to allow time for the user to refill for the upcoming round as well as a few seconds to consume the contents (buy that?). The goods:
Prototyping Issues Abound:
As this is my first ever electronics project, I decided to skip crawling, walking, running and even skipping and went straight to driving at 145mph (hey, it’s how I like to do things). Naturally I ran into issues (finding the right R1, R2 and C1 combo that I actually had on hand for one) with soldering connections, power management and the minimal space available. Also, I didn’t (and still do not) understand the concept of duty cycles so I had to get my hands a little dirty with NPN transistors to invert the signal. Using a breadboard I built the circuit at first using 2 555s so that it would be flashing rather than just on. However, realizing that I would not have enough space I settled on the one but included a single flashing LED for some extra ‘attention-grabbing’ factor. Here are some videos of my successes and my hurdles as well as a link to my thread looking for advice on the Hackaday Forums:
First of all I must say that this community is an unique one full of a multitude of people from every call and group, all of whom are supportive and eager to help. I must say a special thanks to the hosts and sponsors of the 555 contest for making this challenge a reality. I’ve been a fan of the Hackaday Blog for a while (hey, nothing better to do at work than teach myself something eh?) but never had a push to just go buy some stuff and try it out till this contest. A very special thanks to PhilKll for all of his great and persistent help throughout my trials. This was a lot of fun and I’m glad I took the plunge. I look forward to creating many more projects, most of which will likely improve drinking in some way or another.