increase fan rpm with temperature

Add delay to window alarm

Can I do it with analog electronics, e.g. with a capacitor? How do I discharge the capacitor? Does it discharge "slowly" by itself or do I need a resistor/LED? I probably will need a transistor too. Capacitor will be used to control the current flow via the transistor. When capacitor is fully charged, it will let current flow through the transistor which in turn activates the alarm circuit.

If I want a 10 second delay, I can achieve it with a resistance of 100K and capacitor of 100uF [see RC time constant]: tau = 100e3 * 100e-6 = 10 seconds.

https://www.youtube.com/watch?v=GeveeSTyvGs

• Capacitor: 470mF, 100mF
• Resistance: 47K, 22K
• Diode: 1N4001, 
• Transistor: 2N???

https://www.youtube.com/watch?v=LQji9_O9-aI

http://www.the12volt.com/installbay/forum_posts.asp?tid=91691

https://answers.yahoo.com/question/index?qid=20100910203520AAoZUtq

https://en.wikipedia.org/wiki/RC_circuit

Electronics Questions

• How does a capacitor between the terminals of a DC motor act as a filter? How are the transients originating from sparks dissipated/absorbed? See also Why are capacitors capable of suppressing electrical noise in DC motors, RC Circuit, Decoupling capacitor, Bypass Capacitors, Capacitor application examples.
• When a battery is your power source, what is ground?
• Contact bounce in switches/buttons.
• Servo motor buzz/jitter/chatter

Elektronics drawing software

Free tools [reference]:

• Fritzing
• InkScape

Magic Mirror with Raspberry Pi

http://michaelteeuw.nl/post/84026273526/and-there-it-is-the-end-result-of-the-magic

Universal Remote Control

Record and playback modes

Argun'un itfaiye aracının sesini kısma

Potansiyometre bağlı, sesi uygun miktarda düşürecek şekilde ayarla.