.. with a ground-spring and check the output noise (figure 6). It is essential to use the ground-spring, because the ground wire of the oscilloscope probe can absorb a lot of common-mode noises, especially in such measurements. Figure 6. ... .. main differences between the first prototype (my tested board) and the last PCB/Schematic are some modifications in the PCB design and component placement/values. For the first prototype, the output capacitor is only 22 µF-35 V. So I ...
.. that those devices demanded much higher current than he wanted to use. I gave this problem some thought and came up with a design in Figure 1. Figure 1. Schematic diagram. The circuit uses a LTC1799 precision frequency generator from ...
.. of the square wave output voltage to the triangle voltage over C, which rises in frequency, is described in my recent Design Idea (DI), “Wide-range tunable RC Schmitt trigger oscillator” ( Ref. 2 ). There, I use a ...
.. 1 ) used the LM337 regulator in a novel circuit arrangement to translate an input 0-20 mA current source into a 4-20 mA two-wire transmitter current loop (a standard two-terminal industrial current source). The circuit can also be flipped ... .. 3296 types or similar, but single-turn trimmers may also work fairly well, as both pots have a small trim range by design. The di/dV, current stability, and ease of trimming are excellent. Input to output linearity of the basic ...
.. programming interface for the microcontroller (GND-RST-MISO-MOSI-SCK). PCB layout Figure 2 shows the PCB layout of the design. It’s a two-layer PCB board and contains a mixture of SMD and through-hole components. Figure 2. PCB ...
.. The current return side of B consists of the (approximately) known resistance (44 mΩ) of a 41-inch length of 24 AWG copper wire. The resulting 44 mΩ × 0.05 A = ~2 mV drop provides a null reference for the A1a voltage to current ... .. frequent and favorite contributor Nick Cornford gave us a cool and novel acoustic-interface design for a super sub-ohmmeter capable of audibly sniffing out defects in PWBs: “Tuneful track-tracing” ...
.. contributor R. Jayapal recently shared an interesting Design Idea (DI) for power supply control and sequencing in MCU-based applications that combine analog and digital ...
.. U 2A . The comparator’s other input’s voltage causes its output to transition low when the sawtooth rises to 1 volt. U 2A , R 1 , Q 1 , R 8 , C 1 , and U 2B produce a 100 ns one-shot signal at the output of U 2B , which drives ...
.. topic that has recently drawn a lot of interest (!) and no fewer than four separate design articles (!!) here in Design Ideas, is the conversion of 0 to 20 mA current sources into industrial standard ...