Welcome to the N1IR Electronics Website. Totally off the cuff, one take, unrehearsed video projects for anyone interested in amateur radio, electronic design, makers, hardware hackers and science.


Get off you duff and build something!
Training the hand and mind since 1982.

Wednesday, May 18, 2011

OCCED7000 is DONE!!

Finally back after a couple months of course work for a masters degree, thanks Professor Alicata great course, hope to have you again in another course.

Well anyway back into electronics here is a project I think is number one piece of equipment you should build a Triple Power Supply bench top laboratory grade supply. There are plenty of kits out there for the beginner, if your more advanced you can build your own from scratch. I would recommend LINEAR 5 Volt at a couple of amps and dual +/- 15 Volt at about 1 or 2 amps at most. This will cover about 99% of the items you breadboard up and test. Below are some pictures





Features:

25 turn potentiometers, to get in fine voltages

Heat sink are part of copper substrate (about 2 sq inches under chip)

Added AL heat-sink (not pictured)

PM128-E meter, enhanced pm128 with common ground feature so I can tap off the 5 volts to power
the LCD display instead of using a 9 volt battery like in the regular pm-128's

+/- 0-15 Volts (LM317,LM337) and fixed 5V (LM7805)

Two big filter caps 1500uF at 100 Volt

four heavy 6 amp rectifier diodes (way more than I need)


This is an old version a current version we are going to use next school year is an arduino based display, our old display PM-128E cost about $20 and only displays one voltage at a time. With and arduino based screen we will have 20X4 Blue LCD display all three voltages at the same time and all three current outputs and at less cost about $5 to $10. The display first displays a splash screen with the student name and year of grad and email for 10 second on start up then displays this:

SSVT TPS Model 101
V1 XX.XXV I1 XX.XXmA
V2 XX.XXV I2 XX.XXmA
V3 XX.XXV I3 XX.XXmA