Now working for 10 consecutive days

A project log for Low Quiescent Current + Solar Powered 1W LoRa

Minimal quiescent energy loss and high powered 1W LoRa transmitter with bespoke switching circuits and onboard SMT solar panels

Capt. Flatus O'FlahertyCapt. Flatus O'Flaherty 01/30/2023 at 08:330 Comments

The device has been outside and working now for 10 days, transmitting regularly through the day when solar power is available and through the night after a nice sunny day. However, most days it has been cloudy and even on bright days the sun just hovers on the horizon and bluntly refuses to rise any higher. It's a great test for the system as, other than on the North Pole, this is a great test environment. The AemLION did it's job well and after taking a few measurements by hand of the battery voltage every now and again, the voltage never dropped below 3.6V and so the battery was always well protected.

The next step is to get the battery voltage data onto an online database and start drawing online graphs. There will also be some tinkering with the transistor and gate circuit to try and see if there is any leakage current over the collectors and emitters. There's some new circuit boards arriving although currently stuck amongst Year of the Rabbit celebrations and COVID in China and I'm hoping to do some side by side tests using different design parameters and look at the graphical outputs for performance evaluation.