Archive for the ‘Prototyping’ Category

3D prints: Stevenson screen

Building a basic weather station today is simple and cheap thanks to specialized integrated circuits featuring temperature, humidity and pressure sensing. Up to now my favorite is the Bosh bme280; you may easily find it ready for use on small PCBs, easy to connect on any prototyping platform. Adafruit industries is selling a very convenient […]

Checking clock accuracy

This T&T explains how to check the accuracy of a Real Time Clock (RTC). Lets make it a little bit harder and say that you do not have access to the Internet… Checking a RTC requires a highly accurate reference time base which can be read from a radio signal. Starting from there, two options […]

PCBs (Part 4)

Part 1, 2, 3, 4 PCBWay order review Delivery: The parcel arrived in my mail box 5 days after the order date, as announced !!! This is great news as we are all eager to get the real thing asap. Packing (Mail): The parcel was delivered by DHL: we know this company, I personally used […]

PCBs (Part 3)

Part 1, 2, 3, 4 Once we have our gerber files ready, it is time for “printing” the PCB. For a long time (and a long time ago) I used single sided coated copper Bakelite boards. Then I would copy the circuitĀ  on copper using a special permanent ink pen (in negative) and immerse the […]