Rasbian on the Raspberry Pi is great, but the official image is large and includes all sorts of stuff I don`t need (my Pis don`t generally have screens as I use them for playing music, or being GPS NTP time servers, or collecting data on my power usage not things which need, for example, a screen and a gui!). I did manage to cobble together a
Click here to download the full size of the above Circuit.
base install using the Debian installer on a Pi, but it took a loooong time, and cloning this image every time I want to do a new one is a bit of a pain; for one thing the image is quite old now so apt-get has to update a lot of packages to bring it up to current, and for another the machines all get the same ssh keys, and the filesystems all have the same unique` IDs (which tends to confuse things if you simultaneously plug 2 of the resulting SD cards into the same PC!). So I`ve been mucking around with a better way to generate basic Rasbian installs for the Pi. I`ve discovered that the combination of multistrap and qemu-static allows the building of a complete up-to-date installation tree on my x86-64 Ubuntu desktop in a tiny fraction of the time it would take to do the same thing on a Pi. For my base install (which is indeed very basic) my machine takes about 5 minutes (with the packages files already in my apt-cacher-ng cache). Sometimes the longest step is copying all the data to the SD card! One of the nice things about using multistrap to do this is the ability to make cascaded configurations so I can define a base configuration which works for me, and then have other configurations which build on top of it for specific applications. If I make improvements to the base, then regenerating one of the cascaded configurations will incorporate the improvements automatically. It also means I don`t have to remember or...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
characters left: