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24 items tagged "timer"
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eric [+],
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douglas [+],
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555 timer projects [+],
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14:21
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Hack a Day
This workout timer turned out great. We think [Douglas] managed to end up with a professional look and a full range of features even though he was doing a lot of learning along the way. He wanted a clock that was capable of counting up or down to time different segments of his workout. In [...]
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9:50
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Hack a Day
CircuitLab is an electronics simulator which you can run in a browser. Above you can see one of the example circuits provided to help show the power of the application. You can build your schematic (perhaps you want to try [Jeri's] psu shut-off timer?) in the editor mode, then switch over to the simulator to [...]
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5:01
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Hack a Day
[Alan] was unimpressed by the cheap ticking egg timers that grace many of our kitchens. He decided this was an execllent opportunity to ply his skills with microcontrollers. He built this kitchen timer complete with an enclosure and audible alarm. The device is Arduino based, which makes driving the graphic LCD quite easy thanks the [...]
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14:53
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Hack a Day
[GrowColt] shows you how to modify a lamp timer for use with hydroponics. You can pick up this type of mechanical timer at most local big box stores for around $5. The timer plugs into an outlet, and the device you want to operate plugs into it. [GrowColt's] end goal is to make the timer [...]
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13:35
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Hack a Day
[Micha’s] washing machine is equipped with a rather inaccurate timer, so it is always difficult to estimate when the load will be finished. Since it is located in his basement, he hated having to check on the machine continually to know when his clothes were done. Instead of hauling up and down the stairs over [...]
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14:01
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Hack a Day
After the electromechanical timer on [Paul Canello's] washing machine broke for the third time he decided he needed to stop repairing it and find a more permanent fix. He decided to build his own microcontroller-based system for washing his clothes (translated). Caution: The image links on [Paul's] page seem to be broken and will unleash a never-ending [...]
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8:50
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Hack a Day
It’s been nearly two months since the official entry portion of the 555 timer contest came to a close, and the judges have been busy poring over the 200+ entries since. Now that the votes have been tallied, it’s just about time for the official results to be announced. The results will be live streamed [...]
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9:01
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Hack a Day
That’s exactly what [Kenneth Finnegan] figured out with his original investigation into low powered MSP430-based circuits. He was able to keep a count-up timer running off of 20F worth of capacitors for over 10 weeks. Although quite impressive by its own merit, many people left comments that questioned whether similar results would be seen in [...]
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7:49
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Hack a Day
Gaming industry software engineer [Pedantite] writes in to let us know about his latest endeavor, an AVR based parental assistant timer: Good Times. Looking for a new project that would be both useful and interesting, his wife suggested a “time out/ time’s up timer”. Like most of us [Pedantite]‘s children are well studied in [...]
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15:45
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Hack a Day
In Colorado, amateur luge competitions are serious business. Every winter, [Ryan's] friends dig a long luge track through the many feet of snow that occupies their yard, and have competitive sled races to see who can make it down the giant hill in the least time. They call it the Mario Cup, after one of [...]
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9:30
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Hack a Day
[R-B] designed a 555 timer circuit to scan a keypad. Keypads are common interfaces for small projects and require row and column scanning by a microcontroller. [R-B's] setup allows you to reduce the number of pins used on the microcontroller to just two. One is an interrupt that is triggered when any of the buttons [...]
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7:58
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Hack a Day
[Bob] has been busy lately putting the finishing touches on three different projects that he plans on entering into the 555 Design Contest. His first entry is a low-power H-bridge, which can be used to drive small servos. While he admits that it is a bit odd to build use a 555 timer to construct [...]
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6:02
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Hack a Day
The 555 Design Contest shook a whole bunch of really creative circuits out of the trees, hence the 555-heavy content lately. While not technically part of the contest, [esalazar] wanted to know what made the 555 tick, literally! He started working on the project in a circuit simulator, then ultimately ended up building the three [...]
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4:07
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Hack a Day
[Eric] recently built an AM radio based on a 555 timer, and posted a few pictures to the Hack-a-Day Flickr pool. He used the 555 timer as an AM demodulator and power amplifier in order to drive the speaker. A hand-wound inductor is used to tune the signal which is then superimposed over the ramp [...]
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5:04
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Hack a Day
Several years ago [Michael Davis] built a charge controller for his wind turbine and published his construction plans online. This build became quite popular, especially among people that live in remote regions. He states that he is flooded with email each day with questions about his charge controller from people trying to troubleshoot its construction [...]
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11:29
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Hack a Day
Santa brought [Quinten's] son a shiny R/C truck for Christmas, but this new toy had one drawback – its batteries could only be connected to the charger for a maximum of 6 hours, lest he turn his house into a pile of smoldering ash. With grave warnings from the manufacturer dancing in his head, he [...]
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14:30
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Hack a Day
This post on Reddit by [superangryguy] caught our attention today. He’s put together a video explaining the basics of how to build balancing robots, focusing on a 555 timer based one. He’s got two main versions, the 555 based one and another that is based off of two transistors. He says the 555 based one [...]
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9:48
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Hack a Day
Bust out that 555 timer and use it to build your own AM radio transmitter. The circuit that [Rtty21] is using only needs the timer chip, an NPN transistor, three caps, three resistors, and a potentiometer. It generates an amplitude modulation signal around the 600 kHz range which you will be able to pick up [...]
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6:25
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Hack a Day
This interesting box of buttons is a talking poker tournament timer. Full of useful tools like a binary time display, words of wisdom, countdowns to the end of the game, and even good old “bicycle built for two” mode (around 1:20). While we find it fairly difficult to understand, we applaud the feature list, especially [...]
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10:00
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Hack a Day
Sometimes, sitting in a windowless office can drive you crazy. Adding a little bit of life and color can really help. [Gripen40k] did this by building a biosphere. He didn’t have any windows though, so he made an LED light on a PIC based timer. What is interesting is what he did with a thermistor. [...]
1337day (was: Inj3ct0r, 1337db)
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