int sensorValue = analogRead(A1); float volt = sensorValue * (5.0 / 1024.0); Serial.print(volt); Serial.println(" V"); delay(1000); } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 串口监视器如图所示: 在获得电压值可以进一步计算出当前热敏电阻的阻值大小,利用之前的...
Connect three wires to the board. The first two, red and black, connect to the two long vertical rows on the side of the breadboard to provide access to the 5 volt supply and ground. The third wire goes from digital pin 2 to one leg of the pushbutton. That same leg of the button ...
One diode requires 1.2 volt at 20 mA or 1.5 volt at 100 mA so you can supply up to 3 diodes with a 5 volt output. To power 2 diodes with 1.2 V and 20 mA and a 5 V supply, set the resistor to: (5 V - 2.4 V) -> 2.6 V / 20 mA = 130 Ω. For 3 diodes it requires ...
1 low dropout 5volt voltage regulator, 800mA, 6-14v input, TO-252, NJM2845DL1-05 1 ceramic capacitor 0.33uF 1 ceramic capacitor 2.2uF 1 Barrel jack power connector Jumper to enable or cut Vin The board is sold with all the components needed to be assembled by yourself (SMT component al...
I used two nine volt batteries wired in series to create a + or - 9V power supply. Wire up your +V(pin 8) and -V(pin 4) to the op amp. Wire the signal from the mono jack to the non-inverting input (pin 3) and connect the ground pin of the jack to the 0V reference on ...
25mm Micro Spur Gear Motor 370 Mini Electric Motor for Door Locks Dc Motor 6volt 12volt 24volt High Speed 1500rpm 1200rpm $3.00-3.60 查看商品详情 有用(1) 1234...84 供应商详情 TT Motor (Shenzhen) Industrial Co., Limited ...
Connect three wires to the board. The first goes from one leg of the pushbutton through a pull-down resistor (here 10k ohm) to ground. The second goes from the corresponding leg of the pushbutton to the 5 volt supply. The third connects to a digital I/O pin (here pin 2) which rea...