- Found and downloaded iCharger wiring.
- Added picture of connections (below)
- Ran multi-meter across iCharger break-out board (unexpected results !)
- Selected connectors for iCharge to Cart
- Worked out how to make a battery pack
- Worked out why the regulators keep burning up (too much voltage ! 7815 has maximum of 35volts input).
- Anything with fixed output (12V or 15V) has too-low input voltage.
- An adjustable regulator with enough power (5A) is $16.95 ! --- AND --- is in the TO-3 package (bugger !)
- The LM350K (3A, TO-3 package) can only output 1A at a voltage difference of 30volts ... for $13.95 !
- The LM338K (5A, TO-3 package) has current limit circuitry, and can supply up to 12A for 0.5s ... but only 1A at a voltage difference of 30volts ... for $16.85 !
- This leaves only the LM2576 ... which will give from 4.2Amax to 6.9A max (depending on voltage difference). Part ZV1460, $16.95.
- Purchased the correct switches, and the correct relay.
- Purchased 8AWG and 12AWG wire (the closest I could get to the batteries) to practice soldering on.
- Read the full spec sheet for LM2576 ("Simple Switcher 3A Step-Down Voltage Regulator").
Battery box progress
- Bought Aluminium, and determined the final shape of "battery box".
Cart Progress
- Print Cart steel plans ... to show Poppy, and take to Poppy's house.
