If you design circuits powered by CR2032 batteries here’s an article located by Joe Desbonnet which you should consider: This is an interesting article on how the performance of a cell/battery under pulsed loads can vary dramatically depending on period, … Read more
Tautic Electronics has donated five dual output breadboard power supply to the Open 7400 Competition. Get your entry in and this and other cool hardware can be yours.
Another review of ITead’s OverLoad programmable dummy load: All in all, interesting device. The only major flaw I see attm is that instead of using DAC and drive the current value trough mcu they are doing that analogue … I’ll … Read more
Another article that might help with bench power supply designs: A good, reliable and easy to use bench power supply unit is probably the most important and most used device in every electronic lab. A proper electronically stabilized bench power … Read more
tempmj posted his first impressions ITead’s new programmable dummy load. Via the forum.
schazamp built an FSAR001 experimenter board: This device, remember, takes 80-265Vrms wall power and puts out a (relatively) clean 5V DC. According to the datasheet, the way this thing works is by monitoring the voltage of the AC waveform and … Read more
Not everyone understands how multimeters measure RMS voltage. Doug Criner has put a good explanation. Can there be more than one RMS value of a voltage waveform, but only one of them is true? Apparently so.To use simple Ohm’s law … Read more
Here’s a design for a digitally controlled power supply: I’ve built quite a few power supplies over the years; it’s an almost vital tool for electronics. It’s been my plan to built one which would drop the analog potentiometers in … Read more
If you need a 5 to 10 volt DC power source and only have a couple AA batteries, here’s a simple solution from CoolCircuits. It uses four transistors and a handful of passive components to produce an adjustable 5 to … Read more
Clearing out old posts before the new year, some of these might seem ancient. Great read on switch mode power supplies. From the comments: Maybe you want the index page, or the SMPS page. From the contact form, via Adafruit.
rsdio tipped us to an app note on a Boost driver for long LED strings. The long strings of LEDs commonly found in TV and display backlighting, street lights, and parking garage lights require a current driver capable of producing … Read more
rsdio tipped us to an app note on a simple current limiter. This circuit lets you program a current limit without using microcontrollers or data converters. It consists of a charge-pump voltage doubler (U1), a current-sense amplifier (U2), and two … Read more
rsdio tipped us to an app note on DC-DC power supplies: This article discusses important considerations when designing a DC-DC power supply. Topics include choosing the right DC-DC converter for the application; MOSFET gate capacitance; high switching frequencies and component … Read more
We’ve been working on a new power supply in the forum, so this programmable power supply project was an interesting read. The PIC adjusts the output voltage using input from a keypad. Via Hack a Day.
siklosi made this programmable bench power supply unit using plans from tuxgraphics.org. Follow our progress on a computer controlled power supply/current sink in the forum and on the development wiki. Via the forum, thanks for the tip!
The computer controlled power supply being developed in the forum is progressing nicely. We got a big boost when Fenugrec posted a few circuit simulations based on a common commercial power supply typology. The simulated circuit is now available as … Read more
We really enjoyed Dave’s video about a junk box constant current load. It can be used to test a number of things like battery capacity, heat sink characteristics. Via Hackaday.
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