Temperature Control for everything!

We love semiconductors!

What about their thermal coefficient? Most semiconductor components may show exponential response to temperature change, result in a large temperature drift. Although the air temperature in lab can be held at a nearly constant value, this may not be precision enough.

Traditional precision PID based temperature controllers are designed with a controller box and TEC chips and sensors. For every component you want to apply temperature control, you need a area reserved for that big controller.

That’s why I start this project – the Project TTC (Tiny Temperature Controller), aiming to design a switching noise free precision temperature controller, small enough to be placed near the TEC chips. The PCB designing stage is finished now, with a 43mm*23mm*4mm size. You can just weld the standard 40mm*40mm TEC beside it, making a 63mm*43mm rectangular tiny temperature controller.

the TTC itself



Modest electronics self heatingSeekwareBlendModeNone

Got a new SBM-20M Geiger-Muller tube

Here it is.


According to seller’s introduction, this is a Geiger-Muller tube from Ukraine. The parameters of this tiny tube are listed below.


Radiation determine: beta soft/hard gamma soft/hard
Voltage of start of counter: 260-320V
Operating voltage: 350-475V
Length of flat part of counting curve (plateau): 100V
Slope of the counting data: <0.15%/V
Own background: <1 imps/s
Working life: 50*10^10 counts
Weight: 2.5g
Dimensions: counter length 48mm, diameter 10mm

I should start preparing for a small high voltage supply for this tiny stuff 🙂