i’ve made good progress on the BBTC project since the first post.
i breadboarded a proof-of-concept design with a single temperature sensor and used an incandescent light bulb to simulate a battery heater. Here’s a demo:
i designed a 4-box Arduino shield. Here is the schematic and board layout:
Next i need to order some parts, fabricate a PCB and finally make a case to hold the BBTC. Please stay tuned.