All posts by david

Prototyping Board 2: Arduino shield

Stripboards & Protoboards, ,
Prototyping Board #2

This board is the number 2 in the “Permanent Breadboards” series. This time, the layout is no more a simple direct copy of a classic breadboard: it’s a mix between a stripboard and an Arduino shield!

The Prototyping Boards are designed to offer the same look and feel as classic breadboards, with the ability to solder connexions: yes, you will have to solder 🙂
In other words, you’ll keep your prototype for life time!
Continue reading Prototyping Board 2: Arduino shield →

Here’s an excerpt from a topic about temperature compensators in exponential converters on Modwiggler forum:
http://www.modwiggler.com/forum/viewtopic.php?t=120518

Frequency drift is caused by the two transistors in the exponential converter being at different temperatures and minimised by them being on the same substrate. This is temperature balancing. Temperature compensation with tempco resistors tries to stop the Volts/oct changing by matching the exponential term which is proportional to absolute temperature. At 25 deg C the amount of change for 1 deg is 1/(273 + 25) = 0.33557% or 3355.7ppm. That is where the figure comes from, it is not 3300pmm or 3000ppm or 3500ppm or anything else.

Continue reading About Tempcos in exponential converters →

Prototyping Board

Stripboards & Protoboards
Prototyping Board

Everyone needs to start with something. Actually, I started with something else, in Real Life. But for this blog “about me, my life and my electronic projects”, this is a good entry point.

I like to test my electronic projects on these nice solderless breadboards, they are convenient, they allow quick prototyping… But when you want to keep your circuit, to last forever, you need an alternative to « solderless ».
Continue reading Prototyping Board →