• on Test & Measurement
  • Published in issue 3/2015 on page 56
About the article

Experimenter’s Transistor Tester

For go/non-go and device gain testing

Experimenter’s Transistor Tester
This simple Platino-based Transistor Tester is designed to subject dodgy and unmarked transistors to OK/RIP and gain tests in a simple way. Transistor matching is also within reach. The instrument handles NPN, PNP bipolar transistors as well as n- and p-channel MOSFETs.
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Relevant websites
Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor 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 its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.

Extra info, Update
Specifications & Features Tests bipolar NPN/PNP; MOSFET N/P channel Device gain range: 5 – 999 (approx.) Auto identification of bipolar/MOSFET, P/N type, c/b/e/ leads, MOSFET gate lead Indicates faulty or no transistor ATMega32 microcontroller on Elektor Platino board Bascom AVR software (free) 20 x 4 LC Display Optional control and readout via serial terminal DC Input: 12 – 18 VDC
Components
Download the BOM list
The BOM (Bill of Materials) is the technically exhaustive listing of parts and other hardware items used to produce the working and tested prototype of any Elektor Labs project. The BOM file contains deeper information than the Component List published for the same project in Elektor Magazine. If required the BOM gets updated directly by our lab engineers. As a reader, you can download the list here.
Want to learn more about our BOM list? Read the BOM list article for extra information.
[must have]
Component List
Resistors
(5%, 250mW)
R1,R5,R9 = 100kOhm
R2,R6,R10 = 1kOhm
R3,R7,R11 = 100Ohm
R4,R8,R12 = 5.6kOhm
R13 = 4.7kOhm
Capacitors
C1 = 1000µF 35V radial
C2,C3 = 100nF
C4 = 100µF 16V
C5,C6,C7 = 1nF
Semiconductors
IC1 = MC7805
IC2,IC3,IC4 = 74HC4052
D1 = 1N4007
T1 = BC548
Miscellaneous
K1,K2,K3 = single-row pinheader socket, cut to size from 36-way part
K4 = dual-row pinheader socket, cut to size from 72-way part
K5 = 2-way PCB screw terminal block, 0.2” pitch
K6 = 3-way PCB screw terminal block, 0.2” pitch
3 pcs DIP-16 IC socket
PCB, Elektor Store # 130544-1
(Component descriptions from ELPP)

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