Other things I have bought
Around this time, I started to run out of cables, and I wanted to stock up on some new items.
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More resistors. These come in strips of 100
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Potentiometers. I chose 6 of varying values.
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Strip cables. Male to Female, and Female to Female.
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I was running out of cable.
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A nokia mobile phone screen looked interesting.
However, apart from the backlight coming on, none of the datasheets I found nor example sketches produced
anything on the screen. I'll come back to it when I need it.
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Soldering iron. An essential piece of kit, I choose lead free solder to use.
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A few DC motors and a couple of L293D ICs.
The L293D seems a great chip, capable of driving a motor at varying speeds in both directions.
The motors had a 2mm shaft, I struggled to find any useful cogs to fit onto this.
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Battery holders and 50 AA batteries. Investigating how to optimise arduino power usage, I came across the sleep cpu
functions.
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A power transformer and regulator, based on the LM317 chip. These are sold inexpensively as a complete kit
with pcb board, making this an excellent way to hone soldering skills with a useful end product.
The output voltage is adjustable using the pot.
See here.
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A 5V power supply. Chuck in a voltage (check the kit that you buy) and you get a steady 5V DC out. This is ideal
to wire up to a 9V battery for a transportable arduino power supply - so any robot that you build will need
something similar.
This is the kit based on the L7805 chip, see here.
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A mixed bag of capacitors. These were ordered when I found a circuit for the infra red remote control.
Also 2 diodes !
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Another mixed bag of a different type (electrolytic) of capacitors.
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1N4004 diodes. See wikipedia for the difference between the 1N4004 diode and others in it's range.
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An ultra sonic distance detector. I want to make a robot that can prevent walking itself into chairs !
Photo next to a tealight candle for scale.
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A variety of transistors, to see how they work and what they do.
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