.. conversion based on the classic combination of a voltage-to-frequency converter (VFC) with a counter has been around for (many) decades, mainly because it has some durable ...
.. nothing critical about the suggested 200-Hz PWM cycle. You need to change only R 1 and C 1 to accommodate any convenient frequency. How closely the R 1 C 1 time constant matches the PWM-cycle time determines the settling time of the A ...
.. back in 1986, famed analog innovator Jim Williams, in “Designs for High Performance Voltage-to-Frequency Converters” ( Reference 1 ) published his “King Kong” 100 MHz VFC. I have never seen ...
.. This Design Idea applies essentially the same principle to analog meters under normal operating conditions. Connecting a meter to a voltage source with low internal resistance applies electromagnetic damping and makes the meter's ...
.. by 10 circuit. The equation below can be used to obtain the time delay, T, in seconds. Where F is the U1 (555) oscillator frequency in Hz. Figure 1. The above circuit produces an OFF delay of 30 minutes. The switch SW1 can be thrown on ...
Let’s see how you can effectively double the output sink current of the plain old 555 timer. From the block diagram in Figure 1 taken from the datasheet of the ST’s TS555 low power single CMOS timer) we can see that the Discharge pin ...
.. the level of liquid water in a vessel such as a swimming pool. The LMC555 sensor oscillator provides an output-signal frequency that is a function of the water level. This signal drives a DS2423 pulse counter. A host PC or µC ...
.. suited for a wide variety of applications. For example, low-power op amps can be used in a low-power system, and high-frequency op amps can be used for a high-frequency PWM. The circuit in Figure 1 also generates a triangular wave. ...
.. from C1’s 2.2 µF summing point capacitor (Trace D) via Q5 and Q2. C1 servo-controls this oscillator to whatever frequency is required to maintain C1’s summing point near zero. Since the current into C1’s input is ...
.. output crosses the D input’s trip point, switching again occurs and the entire process repeats. The repetition frequency depends on the input-derived current, hence the frequency of oscillation is directly related to the ...