diff --git a/README.md b/README.md index 483711545c5927b309a15c5e14f1e88e21440fef..d42449b8b693df9985e34b2a46ec89bdfff19f80 100644 --- a/README.md +++ b/README.md @@ -7,4 +7,7 @@ This is documentation for an energy monitoring device built around the nRF52832 This device produces around 0.1 volts/amp out of the sensor (or ~1 mV per Watt through the plug). The nrf adc has a +-0.6V reference, 4x gain, and 12-bit conversion, which might resolve 100mW (maybe finer with oversampling). Certainly not precision measurement, but good enough for monitoring appliances. - The nRF52 radio+microcontroller draws 5mA in transmit and receive, so it could operate well within the specs of a coin cell, or harvest from the power line (say, using http://www.linear.com/product/LTC3588-1) to charge a capacitor for power. \ No newline at end of file + The nRF52 radio+microcontroller draws 5mA in transmit and receive, so it could operate well within the specs of a coin cell, or harvest from the power line (say, using http://www.linear.com/product/LTC3588-1) to charge a capacitor for power. + +Below, we see the flux guides registered into pockets on the pcb. +<img src='img/bc832-watt-0.jpg' width=40%>