Help me build a simple timer circuit

[bren21m]

hey guys u need to build a timer, i want to make a servo make one revolution (about 2 seconds) every 20 seconds or so im pretty sure i need a 555 timer and i would like the 2 times to be adjustable. the servo is powered by 4 AA batteries
thanks!

 

[mister_rf]

Re: simple timer cuircut

:-D
A similar topic here:
https://www.edaboard.com/threads/237875/

 

[thannara123]

Re: simple timer cuircut

look here https://wolfstone.halloweenhost.com/TechBase/com555_555TimerCalc.html

 

[bren21m]

Re: simple timer cuircut

:-D
A similar topic here:
https://www.edaboard.com/threads/237875/

i couldnt quite understand that,, i wanted like a diagram on how to build it and what parts i needed

 

[mister_rf]

Re: simple timer cuircut

No problem. We’ll do a shopping list.
1. LM555 circuit (NE555/TL555)
2. TIP120/TIP121 (BDW93C/ BDW42) NPN darlington transistor
3. 1N4148 diode
4. 100nF capacitor
5. 470uF/16V capacitor
6. 4.7k resistor /0.25W
7. 1k resistor/0.25W
8. 51k( 47k) resistor /0.25W
9. 47k (50k ) /0.25W variable resistor
10. 250k (500k) /0.25W variable resistor
11. 5x5 cm PCB test board
:-D

 

[bren21m]

Re: simple timer cuircut

No problem. We’ll do a shopping list.
1. LM555 circuit (NE555/TL555)
2. TIP120/TIP121 (BDW93C/ BDW42) NPN darlington transistor
3. 1N4148 diode
4. 100nF capacitor
5. 470uF/16V capacitor
6. 4.7k resistor /0.25W
7. 1k resistor/0.25W
8. 51k( 47k) resistor /0.25W
9. 47k (50k ) /0.25W variable resistor
10. 250k (500k) /0.25W variable resistor
11. 5x5 cm PCB test board
:-D

i just got the arduino board model uno, i have the program i was wondering how to use it

 

[mister_rf]

Re: simple timer cuircut

Yes it is possible to write such a program for the Arduino.
Search the web for Arduino alarm clocks, timers, water-heater controls and you will find many examples of Arduinos used for timing control.
e.g.
**broken link removed**
**broken link removed**
read here some tutorials:
http://arduino.cc/playground/Code/Timer1
**broken link removed**

http://www.adafruit.com/tutorials#0

 

[bren21m]

Re: simple timer cuircut

Yes it is possible to write such a program for the Arduino.
Search the web for Arduino alarm clocks, timers, water-heater controls and you will find many examples of Arduinos used for timing control.
e.g.
**broken link removed**
**broken link removed**
read here some tutorials:
http://arduino.cc/playground/Code/Timer1
**broken link removed**

http://www.adafruit.com/tutorials#0

which one would i need to make it go from 0 to 180 degrees in 15 ms, then back to 0 degrees in 15 ms every 22000 ms