Turn-key PCB assembly services in prototype quantities or low-volume to mid-volume production runs

Weird way of testing multiple things with Arduino

If you are nerdy enough, then such devices would look great in your collection. Ctopconsult have build so called Arduino monitor/tester. It has a monster load of LED indicators and other things that enables to test and control multiple things from a single board. There is a long list of supported sensors and devices. Each input and output has a LED indicator. It is Arduino compatible as a shield and can be powered from either 5V or 3.3V. As separate attachable module there also comes LEMO I/O, shake sensor, TMP36, microphone, piezo speaker. Built in options include button, toggle switch, two pots, seven segment display, small coil voltmeter, piezo speaker, 4 digital outputs to open-drain MOSFETs, couple opto-isolated I/Os, couple I/Os through LEMO coax-connector, reed relay, mercury shake to digital input, LDR, NTC, etc. Once front panel is one, everything seems pretty well organized and obvious with its text labels and numbers. Continue reading

One simple way to build light follower

You can find many ways to use light tracker. It can be a simple toy that drives around and follows light pattern or complex system like solar panel tracker that follows sun path on sky. In order to build a simple light follower prototype you only need few common components like Arduino, four LDRs (Light Dependent Resistor) and servomotor. This set up uses four LDRs to gt light intensity readings. Two sensors are positioned at the bottom and two at the top of platform. You could get away with two LDRs but pairing them give more stable and reliable readings. The algorithm is pretty straight forward. Arduino reads LDR values, calculates averages of pairs and then finds a difference between up and down part. And depending on difference it turns servo motor when it reaches equilibrium. Of course it is not possible to get equal readings so there is some threshold allowed when light source is near to perpendicular position. Project is mounted on to cardboard based enclosure that is great for quick demos. Continue reading

Image Scanning Sequencer: The Combination of Retro and Modern!

Human being is a very special living species, as it can have different types of living lifestyle in different eras. Honestly, life in the 70s is a very funky and interesting ones, where you can wear the hippie style cloths and get grooving with the disco dance all night long! Well, this image scanning sequencer is a finest combination of retro and modern. This image scanning sequencer can be used for scanning images, and plays the image as MIDI notes. LDRs have been applied onto to project, so that it can measure the gray-scale of specific point of an image and triggers MIDI notes from a selected threshold. The velocity will be set by the darkness, only when the threshold reaching the velocity. This means, the darker point the higher the velocity! The image scanning sequencer plays the notes as a arpeggiator, where is a feature available on some hardware synthesizer and virtual instruments. It allows the player to automatically step through a sequence of notes based on the player’s input. By the way, the sequencer has 24 LDRs, which… Continue reading