Spot X Satellite Messenger an important safety device for emergencies off grid

SpotX is Great Device for Camping, mount climber, hiking to your family and friends while you far from them. It sync with google map and your family and friends could know your position in the map , very save device and works very well in cold and rainy temperature, also there is features you can update to your social media twitter and facebook your realtime position and text message and email shows your exact GPS and altitude position. 

There is SOS button and if you press will exactly tell your family and friends exactly your  coordinate position. 

Spot X is great safety and emergencies device you can count in off grid area. 

71% Customers satisfied with SpotX , 29% giving 1-2 star on SpotX.

SpotX can exchange message and email from any virtual account anywhere in the world.

Can Sent SOS to 24/7 rescue center, can check tracking with certain interval time let your family and friends know you're ok and have interface with google maps. 

Electronic Stethoscope Circuit

 

Electronic Stethoscope Circuit 

Using 1 BC548 Transistor  ,and several passive components , and Buzzer 1 also 4,5 V Battery . Source Elektor Electronic

The modern digital stethoscope as The 3M Littmann CORE Digital Stethoscope features the outstanding acoustics, comfort and quality of a Littmann cardiology-grade stethoscope enhanced by powerful digital technology. Features like up to 40x amplification* and active noise cancellation can help you auscultate with greater confidence. The Littmann CORE Digital Stethoscope connects with Eko software on a smart device** to visualize, record and share data.

*40X amplification based on comparison of analog versus electronically assisted amplified listening with maximum volume at the peak frequency(125 Hz). Check it Out !