spook123_uk
Well-Known Member
Now I'm really getting into this brewing malarky, I've turned my attention to yeast starters ready for my next brew. Whilst in the shed the other day, I noticed I had a spare project box and an old gutted computer. so I decided to make a stir plate.
I used a 92mm case fan and the control board with knob from the old case. I fitted couple of switches, one to turn on and off and another with a resistor wired across it to halve the voltage (and speed) of the fan for when a more gentle spin is required.
The magnet glued to the top of the fan is a really strong rare earth magnet (neodymium) which I liberated from the inside of an old hard drive.
I got a cheap 2L conical flask made from Borosilicate glass and a cheap magnetic stir bar to complete it.
Job done. If I was buying the kit, it would have been around ã15 - ã20 on the parts for the stir plate.
Flask was ã17 delivered and the stir bar was ã3. I'd need the flask even if I was making a starter without the plate I reckon.
I used a 92mm case fan and the control board with knob from the old case. I fitted couple of switches, one to turn on and off and another with a resistor wired across it to halve the voltage (and speed) of the fan for when a more gentle spin is required.
The magnet glued to the top of the fan is a really strong rare earth magnet (neodymium) which I liberated from the inside of an old hard drive.
I got a cheap 2L conical flask made from Borosilicate glass and a cheap magnetic stir bar to complete it.
Job done. If I was buying the kit, it would have been around ã15 - ã20 on the parts for the stir plate.
Flask was ã17 delivered and the stir bar was ã3. I'd need the flask even if I was making a starter without the plate I reckon.
