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| 2 opamp as bridge output. |
| Stacked board |
| Weller WSD81 vacuum pump mod |
| Low power input electric motor 67 miliwatts. How to improve it ? |
| ECC82 or 12AU7 which was first? |
| high energy sustained medium impedance faults? |
| Battery discharge testing |
| Reverse bias protection with p-Mosfet for 4xAA cells |
| ZBD EPOP Blade-C E-Ink Displays |
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