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“Of all the PDP-8s, the 8/I is my favourite. Alas, getting a real one is impractical: they are pretty much impossible to obtain, and just as hard to maintain once you’ve found one. But asI learned from …

“Motivated by success on other acoustic projects and by this brain transplant blog, a sonar project sprang to mind. A phased array sonar works in the same way as a phased array radar. Rather rotating the sensor to look direction …

“This is the same as the previous frequency counter but the output is on the 16x2 LCD display.”

“1Wamp is a one Watt small guitar amplifier based on a JFET guitar pre-amp, the Big Muff Pi tone control and the LM386 power amplifier. This portable amp is an open hardware project designed by ElectroSmash using only free and …

“Counter based on PIC16F628A . Included C code and circuit diagram. Displays -55 to 125 centigrade. The temperature is read every 15 seconds, can be changed in the code. The math is using integers to calculate the degrees and the tenths …

“Let’s equip Arduino with a serial-interface JPEG Camera with IR and try two applications: the first one saves shots (on a SD-card) at regular intervals while the second uses a PIR sensor to detect intrusions and photograph what …

“The cloud cam is a project to build an internet-connected security camera using a Raspberry Pi and Pi camera. The camera can detect motion and upload images to Dropbox’s cloud storage service, or the beta of Adafruit IO, Adafruit …

“The device is designed for contactless measuring and monitoring temperature of objects. It is built on Melexis MLX90614 sensor and can measure temperatures in the range from -70°C to +380°C with 0.5°C accuracy and 0.01 …

“The clock is built on a 4” (101 mm) LCD displays OD-103 manufactured by Orient Display. The LCD provides high contrast of digits and easy reading from a large distance. The unit runs on batteries and can also be …

“With all the madness going on in the world right now, a LED sound reactive peace pendant would help radiate some love”