Month: August 2017

Status snapshot – 30 August 2017

Posted on August 31, 2017

A few more items added to the done list. A couple of enclosure changes tomorrow and it should be good for a power wiring harness… probably a day away from a real test. Library updates / integration list:   Library extern Minimum Functions General purpose notes timestamp.h (DS3231 RTC) get time, make timestamp… Done getRTC() […]

Category: Solar Tracker Tagged

Status snapshot 28 Aug 2017

Posted on August 28, 2017

Library updates / integration list: A few items added to the done list. A big to-do is a power supply update to a DC-DC buck which also supports a 3.3V regulator for the ESP-01. Library extern Minimum Functions General purpose notes timestamp.h (DS3231 RTC) get time, make timestamp… Done getRTC() current time>reg[] setAL1(), setAL2() set […]

AMS-1117 Voltage Regulator Notes

Posted on August 25, 2017

AMS-1117 (5v version) Current recommended application: Voltage regulation to ~750mA Max input voltage sources: 4x or 6x AA battery pack (6V – 9V) for 5V systems 3x or 4x AA battery pack for 3.3V systems LiPo 2S battery for 5V systems Max input voltage: 15V (from the datasheet) 12V as assembled / shipped by the […]

Category: Hardware Tagged , ,

MCP23017 Interrupts, Redux.

Posted on August 24, 2017

When testing a library, especially your own, it helps to complete the entire circuit board first. I found that: 1. I didn’t run a line from either of the MCP interrupt pins to either of the AVR interrupt pins 2. I didn’t connect ANY of the 8 I/O pins on the MCP port B to […]

Category: Hardware Tagged ,