Differential Oscilloscope Current Probe 2.0
Measure Currents Using Your Oscilloscope
Gerber file
CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD members can exclusively download these files for free as part of their membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service.
Elektor recommends the Elektor PCB Service service from its business partner Eurocircuits or AISLER as the best services for its own prototypes and volume production.
TIP: your first PCB at AISLER is free up to €30 with using the coupon code ELCCBB at checkout.
The use of our Gerber files is provided under a modified Creative Commons license. Creative Commons offers authors, scientists, educators and other creatives the freedom to handle their copyright in a more free way without losing their ownership.
Component list
Component list
Resistors:
(all 1%, 100 mW, SMD 0603)
R1,R2 = 1 k
R3,R4 = 10 M
R5 = 10 k
R6 = 50 Ω
R7,R8 = 22 k
Capacitors:
C1,C2 = 33 p / 50 V, 1%, C0G/NP0, SMD 0603
C3,C5,C8,C10 = 100 n / 50 V, 10%, X7R, SMD 0603
C4,C6,C7,C9 = 10 µ / 25 V, 20%, X5R, SMD 0603
C11,C12 = 10 µ / 35 V, 10%, X5R, SMD 0805
C13,C14 = 100 n / 100 V, 10%, X7R, SMD 0805
Inductor:
L1 = 100 µH at 100 kHz, common-mode choke, 200 mA, SMD, e.g. SRF4532-101Y, Bourns
Semiconductors:
IC1 = AD8421ARMZ, MSOP8
IC2 = L78L15ACUTR, SOT89
IC3 = L79L15ACUTR, SOT89
LED1,LED2 = LED, red, SMD 0603
D1–D4 = MBR0540T3G, SOD123
Miscellaneous:
K1 = 3-way SIL socket, vertical mount, 0.1 inch pitch
3-way SIL socket as plug for test leads*
Type RG316 coaxial cable, 50 Ω, 2.9 mm diameter, 1 m, e.g. Conrad 606450*
BNC crimp plug for RG316, 50 Ω, e.g. Conrad 1490723*
USB1KL enclosure, 56x20x12 mm, e.g. Conrad 531276*
Alternative enclosure: TC-USB1 KL203, 56x20x12 mm
Printed circuit board 180665-1 v1.0*
* see text
Discussion (0 comments)