https://nantipov.org/tags/raspberry-pi/ Recent content in raspberry-pi on Engineer's notes Hugo -- gohugo.io en ©{year}, All Rights Reserved Sun, 09 Feb 2020 13:05:34 +0100 https://nantipov.org/2020/02/mono-motor-driver/ Sun, 09 Feb 2020 13:05:34 +0100 Wed, 12 Feb 2020 00:00:00 +0000 https://nantipov.org/2020/02/mono-motor-driver/ Goal The goal of this Mono iteration is replacing the motor driver. In the earlier published post it was mentioned that L298N motor driver creates a significant voltage drop. Well, I decided to go with the TB6612FNG chip as of the Pololu motor driver. Pololu motor driver TB6612FNG Designing the Mono driving module Requirements Okay, we have four motors and two motor drivers with the following pinout. Pololu motor driver TB6612FNG pinout Pin on the left Description I Description Pin of the right GND Logic ground I PWM for the engine A PWMA VCC Logic VCC 2. Nikolai Antipov featured image tech tinker en mono robot rover tb6612fng motor-driver pca9685 raspberry-pi tech tinker en Mono https://nantipov.org/2020/02/mono-power-supply/ Sat, 01 Feb 2020 13:05:13 +0100 Wed, 12 Feb 2020 00:00:00 +0000 https://nantipov.org/2020/02/mono-power-supply/ Goal The goal of this Mono iteration is improvement of the power supply setup. In the previous post it was mentioned that the Raspberry Pi and other infrastructure would be supported with two separated sources. Single battery with huge capacity and 7.4V voltage I came up into solution with Li-Po battery which is known as long lasting power supply. This is a battery up to 5200 mAh capacity and 7.4V voltage. Nikolai Antipov featured image tech tinker en mono robot rover power-supply lipo raspberry-pi tech tinker en Mono https://nantipov.org/2020/01/mono-first-steps/ Sun, 26 Jan 2020 15:27:19 +0100 Mon, 24 Feb 2020 00:00:00 +0000 https://nantipov.org/2020/01/mono-first-steps/ Introduction Let me introduce Mono. It is a small rover which I am going to build using simple set of existing modules. As a base the ready chassis has been taken. And here is the initial version for further experiments. Mono view #1 Mono view #2 Components Let’s start with the following things: Chassis with four motors; Motor drivers L298N (2x); Controller for generating PWM impulses PCA9685 (speed control); Brain as Raspberry PI Zero with WiFi; Batteries and power bank. Nikolai Antipov featured image tech tinker en mono robot rover raspberry-pi pca9685 l298n tech tinker en mono mono https://nantipov.org/2019/02/recovering-of-data-from-damaged-and-quickly-formatted-hdd/ Mon, 18 Feb 2019 14:07:13 +0100 Mon, 18 Feb 2019 00:00:00 +0000 https://nantipov.org/2019/02/recovering-of-data-from-damaged-and-quickly-formatted-hdd/ What actually happened? Friends asked me to check what can be done for “fixing” some “broken” hard-drive. So, what we have? Hard-drive 2.5" 500 Gi SATA; Correctly detected by Windows machine in 3 over 10 times; There are lots of pictures, images, songs, videos very important for owner and his wife in particular; Should be NTFS partition. Quick remark: I am not a professional data recovery guru, so here is just Nikolai Antipov featured image tech en hdd recover quick-format raspberry-pi raspbian testdisk photorec ddrescue organizemusic tech en fix