LEAP#276 Variable Frequency Runway LEDs
The idea for this circuit came from a desire to have an LED effects loop that could be triggered by a microcontroller
without burning cycles to keep the effect going.
There are many ways to achieve this, but the approach I’ve take was influenced by recent experience with the LM331
when building the BoldportClub Pease.
As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub
Here’s a quick video of the effect running on a breadboard:
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LEAP#275 Running the ATtiny at 8MHz
The ATtiny85 runs at 1MHz by default but it con be configured to run at 8MHz while still using the internal oscillator.
IDEs can obfusticate the details, so I delve into the details on checking and setting 8MHz operation with avrdude.
As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub
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LEAP#274 Feeltech FY3200S
Because you can never have too many function generators??!
I have one built into my oscilloscope, made my own, and will probably build many more! But it is nice to have a full-featured bit of kit as a benchmark.
The Feeltech FY3200S gets some good reviews and was available at a very nice price.
In general it works great, but there are some issues and limitations to note.
As always, more notes are in the Little Electronics & Arduino Projects repo on GitHub
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LEAP#273 Voltage Controlled Oscillator
Based on yet another great video tutorial from w2aew,
this was a successful demonstration of how varicap diodes can be used to create a voltage-controlled oscillator
running in the 14MHz range.
As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub
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