I installed Arduino IDE 009 since I figured I should learn this stuff if I’m going to sell Arduino’s (and clones)
My project today was to build a simple NPN Hfe (Beta) meter to do some tests on the now ultra-rare 2sc2291 matched pairs. My multimeter has one but I wanted to make sure I was testing with the same setup as the one in the datasheet, with a Vce of about 6V and Ic = 1mA. The results are in the x0xd0x wiki
This is the breadboard circuit I used:
[flickr 1133534664 ]
its similar to the one described on the x0xb0x page, but with the op amp swapped around for NPN’s
The sketch is rather small, I just take the two analog measurements, do a bit of math and spit out the calculated beta. I checked this against my meter and it matched up for lower betas (although not for higher ones, which may mean I’ve got current leaking into the opamp)
[flickr 1132692007 ]
Join 6,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord
CircuitPython in 2018 – Python on Microcontrollers is here!
Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/
Maker Business — @the_prepared is Soliciting Original Content on Diversity, Equity, and Inclusion
Wearables — Victorian Arduino pizzazz
Electronics — Counting Pin Numbers
Biohacking — Exploring Our Inner Reality : Entopic Visions
Python for Microcontrollers — Building robots with Python, CRICKITS of the week, upcoming hackchat’ & more…
Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com
No comments yet.
Sorry, the comment form is closed at this time.