projects:electronics:weller:wxp80_reverse_engineer:analog_measurements
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| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| projects:electronics:weller:wxp80_reverse_engineer:analog_measurements [2018/05/15 00:30] – admin | projects:electronics:weller:wxp80_reverse_engineer:analog_measurements [2018/05/15 00:39] (current) – [WXP80 analog measurements] admin | ||
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| ====== WXP80 analog measurements ====== | ====== WXP80 analog measurements ====== | ||
| - | This page shows the analog measurements of the WXP80 heating element connected to an operation | + | This page shows the analog measurements of the WXP80 heating element connected to an operational |
| ===== PTC resistance and voltages WXP80 ===== | ===== PTC resistance and voltages WXP80 ===== | ||
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| where $\begin{align*}T\end{align*}$ is the temperature in °C and $\begin{align*}R\end{align*}$ the resistance of TH1 in Ω. | where $\begin{align*}T\end{align*}$ is the temperature in °C and $\begin{align*}R\end{align*}$ the resistance of TH1 in Ω. | ||
| - | Please note that libre office offers an easy method to acquire this equation directly, using the 'show equation' | + | Please note that libre office |
| The opamp is configured as a DC coupled non-inverting amplifier with a bias. To calculate the gain (G) and bias (Vb), we use following equations: | The opamp is configured as a DC coupled non-inverting amplifier with a bias. To calculate the gain (G) and bias (Vb), we use following equations: | ||
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| where $\begin{align*}R3\end{align*}$ = 4.3kΩ, $\begin{align*}R4\end{align*}$ = 33.0kΩ, $\begin{align*}R5\end{align*}$ = 47Ω and $\begin{align*}R6\end{align*}$ = 1.0MΩ\\ | where $\begin{align*}R3\end{align*}$ = 4.3kΩ, $\begin{align*}R4\end{align*}$ = 33.0kΩ, $\begin{align*}R5\end{align*}$ = 47Ω and $\begin{align*}R6\end{align*}$ = 1.0MΩ\\ | ||
| - | The bias voltage is a simply | + | The bias voltage is a simple |
| $V_b = V_{dd} \frac{R5}{R5 + R3} = 4.66 \frac{47}{47 + 4300} = 0.0501 \tag{4}$\\ | $V_b = V_{dd} \frac{R5}{R5 + R3} = 4.66 \frac{47}{47 + 4300} = 0.0501 \tag{4}$\\ | ||
projects/electronics/weller/wxp80_reverse_engineer/analog_measurements.1526337048.txt.gz · Last modified: 2018/05/15 00:30 by admin
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