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Hope you all are staying safe and healthy. The Pandemic lockdown has forced us to work with the only components we have at home. I am working on a battery-operated esp32 pico board having other sensors hooked up to it that need 5v of supply. So I connected two rechargeable 3.7v Li-Ion batteries...

Good day everyone, New to the field. I was wondering if you I could get an expert opinion and advice on my future experiment . First phase of my experiment is to measure the voltage of set cells from different tissues. 1) Which Oscilloscope should I use to read voltage as slow as 0.07volts...

Greetings. A vendor selling TP4056-based 5 V charging modules for Li-ion cells specified the following resistance values and resulting current for selecting the current-programming resistor: R (kΩ) I (mA) 30 50 20 70 10 130 5 250 4...

Hello, the attached is a 4g wifi device however where i live the cell tower signal is very weak, how can i attach external antenna to it for better cell reception and hence better 4g speed