Absolut-CAS
AbuPaad
Hardware mod for Casio FX-82/991ES calculators intended to be used with the NumOS project
Components (26)
| Reference | Value | Description |
|---|---|---|
| Q1 | DMP3099L | -3.8A Id, -30V Vds, P-Channel MOSFET, SOT-23 |
| U1 | TPS73125DBV | Cap free NMOS 150mA Low Drop 2.5V Regulator, SOT-23-5 |
| U5 | TP4056-42-ESOP8 | 1A Standalone Linear Li-ion/LiPo single-cell battery charger, 4.2V ±1% charge voltage, VCC = 4.0..8.0V, SOIC-8 (SOP-8) |
| U7 | TCA9535DBR | 16-bit I/O expander, I2C and SMBus interface, interrupts, w/o pull-ups, SSOP-24 |
| U8 | ESP32-S3-WROOM-2 | |
| C1 | 0.1 | |
| C2,C3 | 10uf | |
| C4 | 1uf | Unpolarized capacitor |
| C5 | 10µF | |
| D1,D2,D5 | 1N4001 | 50V 1A General Purpose Rectifier Diode, DO-41 |
| D8 | 1N5819 | 40V 1A Schottky Barrier Rectifier Diode, DO-41 |
| D15,D20 | LED | Light emitting diode |
| J2 | USB_C_Receptacle_USB2.0_16P |