Mobile setup 2nd iteration

HEQ-5 mount, f/5.6 triplet APO, high resolution SX-814 CCD camera, Lodestar autoguider, narrowband and LRGB filter wheels, temperature compensating focuser and Imaging Source viewfinder. Everything is remote controlled.

Dogs never sleep

Everyone knows the purpose of watchdog and this DIY solution is something similar. GPRS shield with prepaid SIM card and Arduino UNO sends SMS messages into phone when temperature gets out of defined range. It can also do other interesting things like execute preprogrammed "tasks" commanded by SMS messages. Of course this device can do everything which basic UNO does.

Really simple

This DIY thermistor is based on NTC temperature sensor and relay PCB. It is programmable and can act as a heater or vice versa as a cooler.

It's cold so let's give power to the heating elements:

Oops. Now it's too hot so let's stop heating:

Temperature has fallen enough to exceed thresholds so let's start heating again:

Get smart

Get smart with S20 WiFi enabled socket. This really is a problem solver and last line of defense when everything else like computers fail. Simply switch off and on the whole system anywhere in the world with your phone app and hope for the best.

James Bond?

Not quite. This simple gadget is RF controlled 2-channel relay which comes handy in some cases.

In Action

The bricked and refurbished relay board seems to work ok when put into live action:

PinByPin

This DIY solution utilizes Seletek's PinByPin application and particulary it's ability to provide PWM power into selected DB9 connector pins. My aim is to heat two small dew heater bands in order to keep some critical components warm and moisture away during cold periods.