Manufacturers, developers and enthusiasts like to use raspberry pod mini-computer to create projects that may be interested in a new Raspberry pod servo controller capable of controlling up to 3 servos, 2 LEDs and 3 switches from one The raspberry ravioli, Doug Gilliland created the raspberry raspberry servo controller. Features of the new Raspberry Servo Controller include: Raspberry Tweezers plug-in board; suitable for "old" B-type or "new" B-type plus main board; 3-axis servo PWM output (servo not included); two PWM control LED light; I2C control 16-channel PWM controller PCA9685.
5 channels as the above (3 servo outputs, 2 LED outputs); the internal clock generator of the PWM controller does not need to be refreshed; even if the Raspberry has 3.3V input and output, the PWM output operates at 5V, typical servo system Compatible; three switch inputs with pull-up resistors on the motherboard; embedded connector side connectors for minimal form factor; ultra-small size 1.4" x 1" Python PWM, Adafruit driver.
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Split set bolt is also called "Split Set Stabilizer". It was successfully developed by American Professor Scott in the early 1970s. It was used as a patented product by Ingersoll Rand for mining support. In the early 1980s, the Beijing Institute of Well Construction conducted exploratory tests on slotted pipe anchors in the laboratory and achieved good results. Later, it was gradually promoted and applied in the coal system.
Split set bolt is a underground mining support product. It has simple installation process and convenient use. It has strong anchoring force and tensile strength in underground mining and shotcrete support. It has Large force, strong expansion force.
Split set bolt has good supporting effect. Bolt support conforms to modern rock mechanics and surrounding rock control theory in terms of support principles, and belongs to active support. After the bolt is installed, the stability of the surrounding rock can be mobilized and utilized, and the bearing capacity of the surrounding rock can be fully utilized, and controls the deformation of the surrounding rock of the roadway effectively.so split set bolt can protect the stability of the surrounding rock of the roadway and improve the maintenance of the roadway.
Split set bolt has simple installation and labor saving. It uses fewer supporting materials and lighter weight than other bolts. When tunneling, the transportation volume of supporting materials is reduced, and the labor intensity is greatly reduced, which is conducive to improving the efficiency of tunneling.
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