Category Archive:

The Poor mans Bench Power Supply


Recently Nick had a requirement to present his Electronics Course .  He had to add MOSFETs and VMOS Trani’s to his course and  needed more power supplies for his students to do their experiments

He thought of What Peter did to make a PSU for his 3D printers using a PC Power supply.

The older power supplies have their own On/off switch.  The new ones (ATX PSU’s) need a switch between the Green Line and Ground (Black)

Drill holes on top of the case

Black Banana socket connected to Black wire = GROUND
Red Banana socket connected to the Red wire = +5Volts
Yellow Banana socket connected to the Yellow wire = +12Volts
Blue Banana socket connected to the Blue wire = -12Volts

you may want to parallel some more of these wires of the same colours for more current

Add a Red LED with a 330 or 470R series resistor connected between the Grey wire and ground (Black wire)

Don’t forget to insert chassis mounted fuse holder in series with all the above sockets

This gives you a 5V 30A and 12V 15A depending on the PSU you use.

Nick suggests that you use 3A or 5A fuses to prevent frying your circuits

After he made his poor mans bench power supply he found they are very popular on the Internet!

Here are some photos of the modification and the final product:

Posted in: Random

Continue Reading

Let’s Talk Hack – Raspberry PI FM


Philip explains how to create a mobile FM transmitter using a Raspberry PI and Arduino in the latest instalment of Let’s Talk Hack:

This webcast was recorded at House4Hack in the Let’s Talk Network studio – for more information and live shows go to

Posted in: Random

Continue Reading

House4Hack KZN First Meetup


Last night saw the first meetup of House4Hack KZN with 9 people turning out for first meet.

Peter says some interesting topics discussed, amongst others:
- DIY Telescopes – Ed told us how he grinds his own lenses
- Muscle Wire
- Projects we’d like to tackle
- Interhackerspace Sumo Challenge
- Possible co-workspace rental to help secure venue (several freelancers pool to rent a space we use as office by day, hack by night)
- House4HackKZN 3D Printer almost done
- CNC Project
- Home Automation
- Cold-Drip Coffee

Here is some pictures of the session in progress:

If you are in the Durban area, please join the KZNHouse4Hack mailing list and attend the next meetup.

Posted in: Random

Continue Reading

Get involved

Mailing List / Forum: Google Group

  • Schalk 082 777 7098
    schalk dot heunis at gmail dot com
  • Guy 084 678 0045
    guy dot vandenberg at microsmart dot co dot za
  • Toby