This Design Idea describes a 9V battery-voltage monitor whose total parts cost less than 34 cents (Figure 1). You configure transistor Q1 as a 10-mA current sink. LED1, a Kingbright WP7104IT, is on when the battery voltage is good. When the battery voltage nears the threshold voltage, the LED gradually dims. It goes out once […]
Configure a low-cost, 9V battery-voltage monitor Read More »
I just happened to see some large strips of LED lighting when I was picking up some parts at Maplin which were on sale (if I remember correct they were around £12 per approx. 2m strip) however the controller/driver was still around £40, so I thought I would just build a better one myself. I
Arduino Web Enabled RGB lighting Read More »
This Instructable will demonstrate the building of a bare bones (and really inexpensive… less than $5) Arduino compatible module that can be put together on a small piece of stripboard and can be used either on a breadboard or independently. The following links / similar projects were used as inspiration: * http://www.instructables.com/id/Small-form-factor-DIY-Arduino-on-stripboard/ * http://tinkerprojects.blogspot.com/2012/06/minimal-arduino-on-small-stripboard.html * http://shop.moderndevice.com/products/rbbb-kit * http://txapuzas.blogspot.com/2010/07/paperduino-stripboard.html The
YABBAS – Yet Another Bare Bones Arduino Read More »
Before like two years when I got my first Ladybird toy, I was thinking it will be great if I can charge those wirelessly, without changing the battery. Yes, it is charging very slow, yes it will add some weight, but it will be cool. QI standard is going forward, and there is already some
Wireless power and charging Read More »
Professor John A. Rodgers has previously taught us what the future has in store by way of flexible, stampable microelectronics that adhere to the surface of human skin. As revolutionary as those devices can be – providing critical health-related information from real-time physiological monitoring of the human body – they are limited in their ability
Studying the brain with micro-injectable LEDs Read More »
Description. The circuit given here is of a very useful and accurate digital voltmeter with LED display using the ICL7107 from Intersil. The ICL7107 is a high performance, low power, 3.5 digit analog to digital converter. The IC includes internal circuitry for seven segment decoders, display drivers, reference voltage source and a clock. The power
Digital voltmeter using ICL7107 Read More »
At this week’s International Image Sensor Workshop (IISW 2013, Snowbird, Utah, June 12-16 2013), imec and Holst Centre presented a large-area fully-organic photodetector array fabricated on a flexible substrate. The imager is sensitive in the wavelength range suitable for x-ray imaging applications. Because of their very high absorption coefficient, organic semiconductors allow extremely thin active
A Really Flexible X-ray Sensor Read More »
Here is a really small side project that I developed while working on something else… I had to test a RC speed controller that I wanted to use to control an electric car window motor, and for the 100th time I was facing the same dilemma: find 8 batteries for my remote control, dismount the
DIY servo tester based on ATTiny85 Read More »
Do you think programming is difficult? Did you think Robotics is just for programmers? We don´t think so. Our aim is to make robotics accessible to everyone. At Minirobots we have developed mOwayduino, an open source robot, based on Arduino technology. mOwayduino robot is ready to program, with multiple built-in sensors, motors and more. You don´t need
Let's play robotics with mOwayduino Read More »
In the usual Kuzyatech fashion, when something breaks, we must take it apart. Today, one of the ”early adopter” GU10 style LED lamps decided to fail mechanically: The power supply is wrapped in some tape. But that does not preclude a bunch of exposed mains line points from being visible All part numbers sanded off.
No-name GU10 LED lamp teardown Read More »
