This project contains the passive schematic and PCB design for the circuit as simulated in Bob Pease's High Impedance Active Scope Probe simulations.
This project contains the passive schematic and PCB design for a simple DIY low frequency high input impedance active scope probe adapter.
It could also be used with a DVM.
| ID | Value | Qty. | Package | Components |
|---|---|---|---|---|
| 1 | mmbfj309lt1 | 2 | SOT23 | J1,J2 |
| 2 | Qmmbt3904lt1 | 1 | SOT23 | Q1 |
| 3 | mmbt3906lt1 | 1 | SOT23 | Q2 |
| 4 | 51 | 1 | R0805 | R1 |
| 5 | 100 | 1 | TRIM_BOURNS_3223G | R2 |
| 6 | 3.3k | 2 | R0805 | R3,R4 |
| 7 | 10Meg | 3 | R0805 | RDNF1,RDNF2,RDNF3 |
| 8 | 10n | 2 | C0805 | C1,C2 |
| 9 | SIP3 | 1 | HDR1X3 | CON2 |
| 10 | 620 | 1 | R0805 | RDAMP1 |
| 11 | SMA_90_R300.124.403 | 1 | SMA_90_R300.124.403 | CON3 |
| 12 | SIP2 | 1 | HDR1X2 | P1 |
2. From local computer:
3. Drag and drop an image file here or in the editor
4. Paste image (screenshot) in the editor (only for Chrome)
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