RevB V1.2

Replaced TIP41C and BD139 with TIP120 and changed base resistors on both to 10K.

RevB V1.1

Diff from RevB V1.0

• removed unnecessary 470R from Daytimer module
• added a 10K pull down to the Empty Sensor signal line to keep the basee of the BC547B from floating
• defined where the Daytimer components are on the main board
• rerouted

RevB V1.0

Added

• control header
• expanded monitoring header
• empty hopper detection
• reduced deposit/dispense senor wires from 4 to 3
• added "daytimer" sensor to disable timed dispense at night
• moved optional power switch to 2-pin header
• added footprint for single or stacked USB type B
• added transistor to sink current for PBKA
• traced module boundaries on the board
• decreased resistor values for motor controller and IR LED 555 outputs
• added tab routing to edge cuts

RevA V1.2

For the 3rd small run of PCBs.

This started out on breadboards, then stripboard - with many experiments and revisions. My first two runs of PCBs had some annoying mistakes in them. Fixable, but I want a completely working board - no bodge wires or cut traces required.

Fixed issues found in v1.0 and v1.1.

• PIR is wires correctly and pins arranges to match most PIR module pinouts (v1.0)
• added a 100K bleeder resistor actoss C7 so the pulse shortener works more than once (-_-) (v1.1)
• added another 10K resistor and diode to the timer output so it can turn on the sensors - else it will run for ~11 seconds (v1.1)
• added optional capacitors to the sensor outputs to prevent triggering on power up
• removed unecessary 10K resistors on pin 4 of the timer and IR 555s.
• removed motor and timer pins from the external header and rearranged them to match typical 4-channel level shifter pinouts
• connected the barrel jack switch pin to ground