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A brief Theory on Hydroponics
Log from Teleimperium
Hydroponics is the act of growing plants without the use of soil. When growing plants in soil, water serves to make nutrients in the soil soluble and provides oxygenation for the plant's roots. In Hydroponics, however, the nutrients are instead made...

The strawberry died
Log from GrowInBox
It's been a long time since I last posted a project log and I've been trying to get myself to writing this one for a long time. I started writing it a long time but my computer crashed mid-log.Anyway. I left the strawberry resting on the windows sill...

Quick Update 03/10/22
Log from UltraTower
Currently, I am checking the new PCB and changing the code. As soon as it's ready I'll publish it. Corrections: There were2 errors on my PCB one on the pin of the DHT22 and one on the 5V pump which consumed too much power for the 2N7000. Everything...

Quick Update 03/10/22
Log from UltraTower 2023
Currently, I am checking the new PCB and changing the code. As soon as it's ready I'll publish it. Corrections: There were2 errors on my PCB one on the pin of the DHT22 and one on the 5V pump which consumed too much power for the 2N7000. Everything...

SD card Pinouts
Log from Trimble Yuma 7 Data Extraction
SD card PinoutDATA3CMDVSS1VDDCLKVSS2DATA0DATA1DATA2eMMC PinoutA3. DATA0A4. DATA1A5. DATA2B2. DATA3M5. CMDM6, CLKthe trick bit now is the connection of the power lines and provide supply decoupling. Thankfully I can remove caps from the original board...

Building a model system
Log from Teleimperium
Since last post we've won a LightBlue Bean from http://punchthrough.com. It is a neat little Arduino compatible bluetooth dev board, hopefully we can integrate it into our project. The first step to this project is to get a simple hydroponics system...

When the Chips Hit the Fan
Log from SpiroBoard Aeroponics pH / EC / Motor Controller
I received my AD8648 op amps from Digikey. For small orders weighing 13 oz or less (including packaging), you can't beat their price of their first class USPS shipping. I get my orders on the east cost within two or three days for only a few dollars....

Complete BASIC program
Log from Joy232
I have wrote a complete BASIC program for loading the hook code using the MSX and used "LLIST" command to transfer the program to the PC using the hook code itself. This version was named "complete" because it has instructions on how to change the baudrate...

Soldering perfboard
Log from Earth Lander 84
I took a perfboard and soldered up power and the data/address busses of the MCU, SRAM, NVRAM and the address bus latch.I did't really care about the exact order of the bits when wiring them up, I just went for the easiest layout. I'm not really sure...

Z80 (CP/M) Writing to SD Card
Log from 3-Chip Z80 Design
Digging into SD card writes means shifting gears from the Boot BIOS source code since the Boot BIOS code only does reads. The CP/M BIOS code (CBIOS128.LST) which does the reads/writes after booting. Here's the BIOS code for writes to the SD Card: 0754...

Final PCB : Cost and Modularity
Log from UltraTower
This latest version of the board allows you to choose what you want to monitor in the tower. This board has been designed to be modular to suit your needs. We will look at each module one by one: Main module : This module is mandatory. It is the brain...

PCB V1 : Cost and Modularity
Log from UltraTower 2023
This latest version of the board allows you to choose what you want to monitor in the tower. This board has been designed to be modular to suit your needs. We will look at each module one by one: Main module : This module is mandatory. It is the brain...

PCB V2
Log from UltraTower 2023
Like the previous PCB, you can choose the modules you want. This board has been designed to be modular to suit your needs. Update : - New alternating current circuit for disks and current control circuit (log)- Power supply voltage changeover from...

Getting started with BBB audio and the Sound Synthesis Engine
Log from Vintage Toy Synthesiser
(Original post date: 16/01/16)This week for the project I've been attempting to get started on the sound synthesis engine for my synth, as well as setting up an audio output on my BeagleBone Black. There have been quite a few frustrating evenings in...

Second experiment with known part numbers
Log from Which colours are LEDs sensitive to ?
Time for a second revision, this time with known part numbers: This is the list of LEDs used, from left to right: ---------------------------------------------------------------------------------------------------------------------------------------------...

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