Know How... (MP3)
About This Show
Get the know how to make technology work for you. Fr. Robert Ballecer and Bryan Burnett show you tech projects that you can do yourself and explain everything from tech basics to advanced techniques. Send your questions and suggestions to firstname.lastname@example.org or leave a voicemail at 408-800-KNOW.
New episodes every Monday at 6:00pm Eastern / 3:00pm Pacific / 23:00 UTC and Thursday at 2:00pm Eastern / 11:00am Pacific / 19:00 UTC.
Most Recent Episode
KH 279: The Growduino - Part 1
< 1 day ago
If you grow plants indoors, at some point you'll be faced with the choice of going on vacation and letting your plants die, or becoming a shut-in. You COULD purchase an automated drip-watering system, but if you've got even a little maker knowledge, you can make yourself a low-cost, super-flexible automated watering system.Adafruit 1/2" Water Solenoid Valve ~$8Normally closed valve (Requires 12v to open the valve)Minimum pressure of 3PSILiquid can only flow in one direction (marked on the casing)Live Demo:We're going to install a solenoid valve into the bottom of a 5-gallon bucketParts:5 Gallon BucketAdafruit 1/2" Solenoid3/4" - 1/2" Bulkhead FittingTeflon TapeToolsDrill (3/4" or Dremel)Sealant3D Printed FilesInterior and Exterior Sealing platesClaber 8053 Oasis 4-Program/20 Plant Garden Automatic Drip Watering System ~$94Gravity fed dripper with a timerOpens the valves twice a dayHow long it opens the valves depends on the settinguxcell HH54P D 12V Coil Relay ~$8Relays are electromagnetically controlled switchesMost use the same design: a higher power/current circuit can be thrown by a lower power/current circuitThey can be normally open or normally close, some, like the UXCELL can throw multiple circuits simulUxcell 12V 5-pin Mini Power Relay ~$7
Hosts: Fr. Robert Ballecer, SJ and Bryan Burnett