Micro-DMM
oihdesigns
A small, open hardware DMM
Components (24)
| Reference | Value | Description |
|---|---|---|
| Q1,Q2 | AO3400A MOSFET | 4.2A Id, 20V Vds, N-Channel MOSFET, SOT-23 |
| Q3 | AO3401A | -4.0A Id, -30V Vds, P-Channel MOSFET, SOT-23 |
| U1,U4 | TPS22914BYFPR | |
| U3 | TL431DBZ | Shunt Regulator, SOT-23 |
| U5 | PAM8904JER | |
| U9 | TPS613222ADBV | 1.8A Step-Up Converter, 5V Output Voltage, 0.9-5.5V Input Voltage, SOT-23-5 |
| BZ1 | Buzzer | Buzzer, polarized |
| C1,C9,C10 | 0.1uF | Unpolarized capacitor |
| C2-C4,C7,C8 | 1uF | Unpolarized capacitor |
| C5,C6 | 2.2uF | Unpolarized capacitor |
| C15 | 4.7uF | Unpolarized capacitor |
| C16,C19 | 22uF | Unpolarized capacitor |
| D3 | BAT54S | Vr 30V, If 200mA, Dual schottky barrier diode, in series, SOT-323 |
| J3,J6 | Conn_01x07_Pin | Generic connector, single row, 01x07, script generated |
| J4 | Battery | Generic connector, single row, 01x02, script generated (kicad-library-utils/schlib/autogen/connector/) |
| J5,J7 | Conn_01x01 | Generic connector, single row, 01x01, script generated (kicad-library-utils/schlib/autogen/connector/) |
| L1 | 2.2uH | Inductor |
| LED1 | SK6812SIDE-A_C5378721 | |
| R1-R3 | 4.7K | Resistor, US symbol |
| R4-R16,R18,R20,R21 | 100K | Resistor, US symbol |
| R22 | 1Meg | Resistor, US symbol |
| SW1 | SW_Push_DPDT | Momentary Switch, dual pole double throw |
| SW2 | XY-TBT5858-W-FL | |
| SW4 | SW_SPDT | Switch, single pole double throw |