)) A navíc už sem ho koupil )Hrabosh
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Myslis nieco taketo
DjRix myslel si nieèo takéto??
A tu je celý èlánok:
http://www.pandatron.info/elektronika/c ... &clanek=7&
A tu je celý èlánok:
http://www.pandatron.info/elektronika/c ... &clanek=7&
Caute tak trochu som hladal a nasiel nieco co by vas mohlo mozno zaujimat tak to sem pridam. Je k tomu aj pokec ale v angline.
Relay Toggle Circuit Using a 555 Timer
This 555 timer circuit below toggles a relay when a button is pressed. Pins 2 and 6, the threshold and trigger inputs, are held at 1/2 the supply voltage by the two 10K resistors. When the output is high, the capacitor charges through the 100K resistor, and discharges when the output is low. When the button is pressed, the capacitor voltage is applied to pins 2 and 6 which causes the output to change to the opposite state. When the button is released, the capacitor will charge or discharge to the new level at the output (pin 3). The parts are not critical, the resistors can be somewhat higher or lower, but the 2 resistors at pins 2 and 6 should be equal values, and the resistor connected to the cap should be 10 times greater or more.
Advantages of this circuit are the large hystersis range at the input which avoids false triggering, and only a few parts are needed for construction. One disadvantage is the relay may be engaged when power is first applied. To solve this problem, you could tie the reset line (pin 4) to another resistor/capacitor combination with the capacitor at ground and the resistor at the +V point. This will cause pin 4 to be held near ground for a short period which will reset the output when power is applied.
The 100 ohm resistor and 100uF capacitor serve to filter noise on the supply line if the circuit is used in a automotive application. They may not be necessary. The circuit may work well without those parts.
Relay Toggle Circuit Using a 555 Timer
This 555 timer circuit below toggles a relay when a button is pressed. Pins 2 and 6, the threshold and trigger inputs, are held at 1/2 the supply voltage by the two 10K resistors. When the output is high, the capacitor charges through the 100K resistor, and discharges when the output is low. When the button is pressed, the capacitor voltage is applied to pins 2 and 6 which causes the output to change to the opposite state. When the button is released, the capacitor will charge or discharge to the new level at the output (pin 3). The parts are not critical, the resistors can be somewhat higher or lower, but the 2 resistors at pins 2 and 6 should be equal values, and the resistor connected to the cap should be 10 times greater or more.
Advantages of this circuit are the large hystersis range at the input which avoids false triggering, and only a few parts are needed for construction. One disadvantage is the relay may be engaged when power is first applied. To solve this problem, you could tie the reset line (pin 4) to another resistor/capacitor combination with the capacitor at ground and the resistor at the +V point. This will cause pin 4 to be held near ground for a short period which will reset the output when power is applied.
The 100 ohm resistor and 100uF capacitor serve to filter noise on the supply line if the circuit is used in a automotive application. They may not be necessary. The circuit may work well without those parts.
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- 555-T.gif
- (2.71 KiB) Staženo 302 x
A este nieco
Relay Toggle Circuit Using a 556 Timer
This toggle circuit operates by using a couple 555 timers wired as inverters. Pins 2 and 6 are the threshold and trigger inputs to the first timer and pin 5 is the output. The output at pin 5 will always be the inverse of the input at pins 2 and 6. Likewise, the output at pin 9 of the second timer will always be the inverse of the input at pins 8 and 12. A 100K resistor connects the output of one inverter to the input of the other so the state of one will be the opposite of the other.
In operation, the 1uF capacitor will charge to whatever voltage is present at the output on pin 5. When the button is pressed, the capacitor voltage will be applied to the input of the other timer which will reverse the state of both timers and toggle the relay, either on or off.
To follow it more closely, assume the output at pin 5 is +12 volts and the second output at pin 9 is zero volts. The 1uF cap will be charged to 12 volts. When the button is pressed, the cap will apply +12 to the inputs at pin 2 and 6 which will cause the output at pin 9 to go to zero, turning off the relay. When the button is released, the cap will discharge to zero, since the voltage at pin 5 is now zero. When the button is again pressed, the capacitor will apply zero to pins 2 and 6 causing the output at pin 9 to switch positive and engage the relay, and the cycle repeats.
The advantage of this circuit is the large hystersis range on the inputs. The button can be held closed indefinetly without upsetting the state of the outputs since the input voltage will be 1/2 the supply due to the equal value 100K resistors. The switching points are 1/3 and 2/3 of the supply so that a voltage of 50% has no effect. The circuit will also toggle very fast and needs no switch debouncing. One disadvantage is that it may turn on with the relay either engaged or disengaged. To solve that problem, you could use a resistor in series with one of the reset lines (4 or 10) and add a capacitor from the reset line to ground.
The 100 ohm resistor and 100uF capacitor serve to filter noise on the supply line if the circuit is used in a automotive application. They may not be necessary. The circuit may work well without those parts.
Relay Toggle Circuit Using a 556 Timer
This toggle circuit operates by using a couple 555 timers wired as inverters. Pins 2 and 6 are the threshold and trigger inputs to the first timer and pin 5 is the output. The output at pin 5 will always be the inverse of the input at pins 2 and 6. Likewise, the output at pin 9 of the second timer will always be the inverse of the input at pins 8 and 12. A 100K resistor connects the output of one inverter to the input of the other so the state of one will be the opposite of the other.
In operation, the 1uF capacitor will charge to whatever voltage is present at the output on pin 5. When the button is pressed, the capacitor voltage will be applied to the input of the other timer which will reverse the state of both timers and toggle the relay, either on or off.
To follow it more closely, assume the output at pin 5 is +12 volts and the second output at pin 9 is zero volts. The 1uF cap will be charged to 12 volts. When the button is pressed, the cap will apply +12 to the inputs at pin 2 and 6 which will cause the output at pin 9 to go to zero, turning off the relay. When the button is released, the cap will discharge to zero, since the voltage at pin 5 is now zero. When the button is again pressed, the capacitor will apply zero to pins 2 and 6 causing the output at pin 9 to switch positive and engage the relay, and the cycle repeats.
The advantage of this circuit is the large hystersis range on the inputs. The button can be held closed indefinetly without upsetting the state of the outputs since the input voltage will be 1/2 the supply due to the equal value 100K resistors. The switching points are 1/3 and 2/3 of the supply so that a voltage of 50% has no effect. The circuit will also toggle very fast and needs no switch debouncing. One disadvantage is that it may turn on with the relay either engaged or disengaged. To solve that problem, you could use a resistor in series with one of the reset lines (4 or 10) and add a capacitor from the reset line to ground.
The 100 ohm resistor and 100uF capacitor serve to filter noise on the supply line if the circuit is used in a automotive application. They may not be necessary. The circuit may work well without those parts.
- Přílohy
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- 556-T.gif
- (2.8 KiB) Staženo 128 x
A co takhle použít dvojčinný KO typu D(spínaný náběžnou, nebo sestupnou hranou). V případě CMOS můžeš napájet přímo palubní sítí a dáš k tomu jenom tlačítko, popř. dva pojistné odpory.
D vstup připojíš na +U a 4,7k odpor mezi clock a zem. Tlačítkem budeš přivádět +U na clock. Výstup si můžeš vybrat v 0, nebo I. (Q, notQ)
V případě TTL najdeš v rádiu 5V(určitě tam je)
D vstup připojíš na +U a 4,7k odpor mezi clock a zem. Tlačítkem budeš přivádět +U na clock. Výstup si můžeš vybrat v 0, nebo I. (Q, notQ)
V případě TTL najdeš v rádiu 5V(určitě tam je)
Ak mozes nakresi mi tu schemu pripadne aj s hodnotami...ja sa do elektroniky moc nevidim. To co som sem dal som nasiel na nete tak som sem prispel.bubo10 píše:A co takhle použít dvojčinný KO typu D(spínaný náběžnou, nebo sestupnou hranou). V případě CMOS můžeš napájet přímo palubní sítí a dáš k tomu jenom tlačítko, popř. dva pojistné odpory.
D vstup připojíš na +U a 4,7k odpor mezi clock a zem. Tlačítkem budeš přivádět +U na clock. Výstup si můžeš vybrat v 0, nebo I. (Q, notQ)
V případě TTL najdeš v rádiu 5V(určitě tam je)
Vzdyt to jsou 3 soucastky(KO D, odpor a tlacitko) to snad nepotrebujes kreslit.
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- D.png
- (1.99 KiB) Staženo 138 x
Da se to taky celkem jednoduse resit pomoci invertoru 4069(nebo jineho).
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- 4069.png
- (11.1 KiB) Staženo 103 x
