Tag Archives: Ultra

REVIEW: QCY B900 Stereo Ultra Slim Bluetooth Speaker

QCY B900 Stereo Bluetooth Speaker – Ultra Slim 3D Effect Find it here: https://click.alibaba.com/rd/oek6d4a2 Details: QCY B900 Product Feature: Metal case, fashion design. 2000mAh high-capacity battery, 6hours music playing time. 2.1-channel design, 2X3W speakers, 1XPassive diaphragm, Support AUX audio input, Built-in mic,support handsfree calls About QCY Brand: QCY is the Chinese biggest manufacturer of bluetooth […]

UV LED PCB Exposure Box Build

PCB at: http://diy.rednumberone.com/uv-led-array-exposure-box-diy/ Build a UV PCB exposure box out of a cardboard box. The LED array is fixed in the box with double sided tape. For power supply, 15V, 2A then Using a LM317T as a constant current source with output of 1A. Assembled on a prototype board. It’s a very easy hack to […]