[time-nuts] Hobbyist grade or homebrew temperature testing chamber?

Scott Stobbe scott.j.stobbe at gmail.com
Tue Sep 6 11:48:28 EDT 2016

It is amazing what is available for 10 - 20 dollars. Some of the LED
drivers have a dimming input on the low voltage side. Not sure of the
detailed implementation of a din temperature controller with 4-20 mA
output, but it might be as simple as tl431 shunt reference and a resistor
network to map 4-20 mA to the 1 - 10 VDC analog input of an LED driver
(there are a plethora available "Meanwell led driver" is one that comes to

On Tue, Sep 6, 2016 at 12:05 AM, jimlux <jimlux at earthlink.net> wrote:

> On 9/5/16 8:52 PM, Scott Stobbe wrote:
>> The bargain price mini coolers are often peltier cooled, they appear to
>> fall under the marketing term "thermoelectric mini-fridge". I can't think
>> of a project name, but I'm sure I've seen this done before using a mini
>> fridge.
> https://www.amazon.com/AGPtek%C2%AE-Digital-Temperature-Cont
> roller-Alarm/dp/B005NGL5AK
> Not used this particular one, but i have some that look quite similar, and
> work well.
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