my recent reads..

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 hero_image


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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 hero_image


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LEAP#272 Saike 909D

I finally have hot-air, and I soon realised I shouldn’t have put it off so long! The Saike 909D is a very economical unit, and also includes a bench power supply and solder station. It is not perfect, but I’m nevertheless very happy with the unit and it does a great job at hot-air reflow. As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub hero_image


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LEAP#271 Cordwood Guitar Tuner

The Cordwood has six LEDs. Six is one of my favourite numbers .. like the number of strings on a standard guitar. Here’s a quick build that uses an electret pre-amp and a simple Arduino script to provide a pretty stable and accurate indication of which root note is playing. As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub


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