Schematic Update Instructions
183 days
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Traditional Bronze Jetpack
Properties
Two-bank 6 V igniter firing system with independent eFuse protection and low-droop power path, controlled by ESP32-S3 with GPIO expansion for multiple ignition channels.
5
2S LiFePO4 pack with S-8252A protection, BQ24618 charger, TPS54821 6 V buck feeding dual TPS25982 eFuse banks, each with bulk capacitance sized to support up to 6 A with ≤0.10 V droop over a 1 s pulse, and brought out to a 34-pin IDC connector; ESP32-S3 and dual MCP23017 expanders powered from MP1584 3.3 V buck for control of two independent igniter banks.
5
LCSC
4 positions × 4 igniters per side; channels 1–16 in Bank A; 17–32 in Bank B
monthly
Battery
10000
Arduino
WiFi
Energy
flowchart TD H1["26650 Holder 1"] --> H2["26650 Holder 2"] H2 --> P1["S-8252A Protector"] P1 --> P2["BQ24618 Charger"] P2 --> P3["TPS54821 6V Buck"] P3 --> F1["TPS25982 eFuse Bank A"] P3 --> F2["TPS25982 eFuse Bank B"] F1 --> J1["34-pin IDC Connector"] F2 --> J1 subgraph Control U1["MP1584 3.3V Buck"] --> U2["ESP32-S3"] U2 --> U3["MCP23017 Expander 1"] U2 --> U4["MCP23017 Expander 2"] end
25
Pricing & Availability
Distributor | Qty 1 |
|---|---|
Arrow | $71.02–$76.58 |
Digi-Key | $30.44–$864.48 |
LCSC | $39.51–$44.12 |
Mouser | $43.99–$916.29 |
TME | $23.29 |
Verical | $218.43–$242.79 |
Controls
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