Metric ISO threaded holes Nominal diameter of the threads Drill/hole diameter Pitch M3 2,5 mm 0,5 mm M4 3.3 mm …
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Author: giodem
Energy value of several fuels
The lower heating value (also called energy value, or heat of combustion, or calorific value) is the energy (heat) produced …
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RC filter and isolated buffer
A must have circuit when you go to debug EMC problems in an electrical panel. Long wires (50 m) connected …
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ESP32 self updating from web server
Over the air ESP32 update, fetching firmware from folder in remote server. The new .bin file is located in a …
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PV panel IV curve simulator
This circuit can be used to simulate a PV panel up to 30W and 40V. The open circuit voltage depends …
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PV string simulator to test grid solar inverters
A simple and inexpensive circuit to power a grid-tied photovoltaic inverter on the DC side, reproducing the i-v characteristic of a photovoltaic string. Useful to power an inverter at the bench, during repair.
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Recent projects
DIY Pick and place machine with OpenPnP
This PnP machine is designed to be precise (linear rails) and economic (small 3D printed parts, wooden frame), and use …
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How to open a multicontact solar connector
The two clips need to be pressed-in at the same time, then gently pull the two connectors apart. The best …
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Flash .hex files on Atmega without Arduino IDE
Download XLoader. Select your .hex file. Select your device, com port and baud rate. Click upload.
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