HP Prime and TI-84 Plus: Basic Wheatstone Full Bridge Circuit
The program
WHEATSTONE (HP Prime) and WHTSTONE (TI-84 Plus CE) deals with the full
Wheatstone circuit:
Formulas
EA = E * (1 –
R4/(R4 + R3))
EB = E * (1 –
R1/(R1 + R2))
eO = EA – EB
Variables
used: A = R1, B = R2, C = R3, D = R4, L
= EA, R = EB, O = eO
Resistance is
measured in ohms (Ω), current in volts (V).
HP Prime Program WHEATSTONE
EXPORT
WHEATSTONE()
BEGIN
// 2017-04-25 EWS
LOCAL K,A,B,C,D,L,R,O;
INPUT({A,B,C,D,E},
"Basic Wheatstone",
{"R1: ","R2: ","R3:
","R4: ",
"E: "});
L:=E*(1-D/(D+C));
R:=E*(1-A/(A+B));
O:=L-R;
PRINT();
PRINT("EA: "+L);
PRINT("EB: "+R);
PRINT("e0: "+O);
END;
TI
84 Plus CE Program WHTSTONE
"2017-04-25
EWS"
Input "R1:
",A
Input "R2:
",B
Input "R3:
",C
Input "R4:
",D
Input "E:
",E
E*(1-D/(D+C))→L
E*(1-A/(A+B))→R
L-R→O
Disp "EA:
",L
Disp "EB:
",R
Disp "EO:
",O
Example
Inputs: R1:
200 Ω, R2: 150 Ω, R3: 180 Ω, R4:
200 Ω, E: 16 V
Results: EA ≈ 7.57895
V, EB ≈ 6.85714 V, eo ≈ 0.742180 V
Source:
Strain Gages
and Instruments. Tech Note TN-514 Vishay Precision Group. February 1, 2013. Link: http://www.vishaypg.com/docs/11064/tn514.pdfhttp://www.vishaypg.com/docs/11064/tn514.pdf
Note:
I will be
taking some time off from blogging in early May. I am going to work on a
presentation that I hope to present in HHC 2017 this September (link: http://hhuc.us/2017/ ). I encourage anyone to come attend the HHC
conferences, they are a lot of fun. This
year the conference will be in Nashville.
Eddie
This blog is
property of Edward Shore, 2017