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July 2014 - Circuit Crush

Month: July 2014

Constant Current, or Constant Voltage?

I needed a Constant Current power supply for my bench. Now I don’t know if you have priced bench power supplies lately, but they can be several hundred dollars. Not any more! Would you believe a 40v 3a adjustable voltage or current supply for about $20?https://amzn.to/2MNnOcc I grabbed a used 24vac HVAC transformer, soldered a …

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Put the Physical into Physical Computing!

The whole point of microcontrollers and physical computing is doing something with the data sensed. If you sense a temperature, if you sense motion, you act on it. However, There’s a bunch of science involved when you want to make things move, making sure you have enough power to move said object. The best explanation …

Put the Physical into Physical Computing! Read More »