Ready References
Beginner's Corner, Mar. 1940
Dealing With Dew
Caring for Optics
AAVSO: Services to Astronomy
Signal Conditioning and Data Acquisition Overview
Easy Prototyping
A Great Source of Free Chemicals
Ready References 
Beginner's Corner, Mar. 1940 
Dealing With Dew Caring for Optics AAVSO: Services to Astronomy Signal Conditioning and Data Acquisition Overview Easy Prototyping A Great Source of Free Chemicals