Ever accidentally left your room door ajar for a long period of time and found your valuables missing? Here is an intelligent solution for you. The idea is fairly simple as it mainly requires a TM1637 4-digit display and a Digispark USB development board. Digispark board TM1637 is a popular clock display module with a […]
Door-Ajar Alert with Countdown Timer Continue Reading
Story I went for a shower one day, was getting late for office. Running tight on time, but I didn’t want to come out of hot shower in cold morning. Without any clock in my bathroom I was saying to myself “Lets enjoy the shower for few more minutes, I might be over estimating the
Waterproof 10 Minute Timer Continue Reading
In 1971, Signetics—later Philips—introduced the NE555 timer, and manufacturers are still producing more than 1 billion of them a year. By adding a few components to the NE555, you can build a simple voltage-to-frequency converter for less than 50 cents. The circuit contains a Miller integrator based on a TL071 along with an NE555 timer
NE555 timer sparks low-cost voltage-to-frequency converter Continue Reading
The bipolar NE555 timer IC is widely used in inductorless dc-dc converters, most frequently in doubling and inverting converters. However, another very popular IC, the LM386 audio amplifier, may be a better solution in this application. Note that the results also depend on the specific manufacturer of these multisourced ICs and on the quality of
Comparing the NE555 Timer and LM386 Amplifier as Inductorless DC-DC Converters Continue Reading
Description This project is a timer project and build around popular 555 Timer IC, It can be used for all application required a delay of up to 100 Seconds. Onboard board preset to adjust the required timer duration in range of of 1 to 100 Seconds, Tact switch SW1 to reset the timer and SW2
1 to 100 Seconds Timer Continue Reading
I bought a small aquarium (54l) as an impulse buy and I needed some lights for it, so naturally I wanted to use LEDs. I also needed a timer for the lights. I also wanted the lights to fade in and out when they were going on or off as a cool effect. I ordered
LED aquarium lighting with an Arduino based PWM timer Continue Reading
This is a quick project for a timer. Recently I finished my UV light exposure box and thought that it will be convenient to have a build in timer to switch off the light after preset time. So I had a PIC16F628A lying around and after searching the web I found a Brazilian site (I
Simple timer with PIC16F628A Continue Reading
Hi, so me and my pal are setting up so we can make PCB´s. We are currently making a UV exposure box (possibly another instructable) and for this box, we needed a timer, so this is what we have done so far, and what we are going to do. This project is based on the
Make an Arduino Timer Continue Reading
I am new to Arduino and wanted a project which would teach me different things. This got me involved with sound and the use of a LCD. This project is based on the Instructable posted by bertus52x11 which you can find here http://www.instructables.com/id/After-Dinner-Reaction-Time-Tester/ . While I did start with the bertus52x11 project I did make
Reaction Timer using an Arduino Continue Reading
The wife is into raising chickens and now that the daylight savings is getting near she wanted a way to keep the egg laying production in high gear. According to the material that she reads, chickens will maintain their egg laying production if they get 12 – 15 hours of daylight. I thought to myself,
Chicken Light Timer using an Arduino Continue Reading
