WANTED(EU/DE): function generator - Page 1
Forum section: electronics / general

author: pitfermi
author_rank: Contributor
timestamp: September 05, 2020, 11:00:30 pm
content: does anyone have a spare function generator that they don't use need and would like to donate to an e.e student? i have an oscilloscope which I bought, but the home lab needs a functions generator tooi figured I'd ask here before commiting to buy one. it can be anything, partially working, cheap, whatever it is, pm me if you have something to offer

author: Andreas
author_rank: Super Contributor
timestamp: September 06, 2020, 10:39:25 am
content: Hello,as an ee-student you might want to build your own generator.A simple possibility without special parts might be this one:https://www.elektormagazine.de/magazine/elektor-197801/56359/Of course there are also many kits with XR2206 around.with best regardsAndreas

author: tggzzz
author_rank: Super Contributor
timestamp: September 06, 2020, 11:11:50 am
content: You should build your own function generator: you will learn a lot and it will be very helpful at job interviews.When interviewing candidates, I look for people that candemonstrate:doing more than the minimum, because they like the subjectspotting something that can be improvedsetting reasonable stretch goalspersevering with achieving the goalsassessing what they have learnedassessing what they would do better next time

author: artag
author_rank: Super Contributor
timestamp: September 06, 2020, 02:01:23 pm
content: Getting a faulty one and repairing it is also very helpful to your training - especially if you've already got an oscilloscope - and is likely to give you a far superior instrument to a cheap chinese ebay unit at very low cost.

author: tggzzz
author_rank: Super Contributor
timestamp: September 06, 2020, 02:30:28 pm
content: Quote from: artag on September 06, 2020, 02:01:23 pmThat is sufficient if you are aiming for a technician's job, since most repairs will be replacing capacitors or fuses or spotting where there is heat damage. If you are aiming at an engineering job, design is crucial, but understanding the choices in other equipment can be valuable.Repairing won't give any knowledge aboutwhya particular component needs to be 0.1% but others can be 10%, or which classes of opamps should be chosen.For the avoidance of doubt, technicans and engineers are differentbut equally valuable. Ditto doctors and nurses.

author: pitfermi
author_rank: Contributor
timestamp: September 06, 2020, 04:15:08 pm
content: Danke für deinen Beitrag.the link you provided needs subscription to download the file.Quote from: Andreas on September 06, 2020, 10:39:25 am

author: ledtester
author_rank: Super Contributor
timestamp: September 06, 2020, 04:34:00 pm
content: Quote from: pitfermi on September 06, 2020, 04:15:08 pmHave a look at this page for the 4049 circuit:https://www.homemade-circuits.com/simple-function-generator-circuit/

author: Andreas
author_rank: Super Contributor
timestamp: September 06, 2020, 05:36:22 pm
content: Quote from: ledtester on September 06, 2020, 04:34:00 pmGood find.this is exactly the cirquit.with exception of C1 which is 33nF instead of 33pF in my link.with best regardsAndreasEdit: Attached my PCB-layout.In that time I typically used a hand made layout to generate the punch marks for the holes into the blank copper surface of the PCB. The connections were hand drawn with a special stylus filled with etch resistant ink (DALO 33). After etching the holes were drilled.