.. converters and the 555 analog timer chip, and therefore a double obsession with VFCs based on the 555. In fact, my first Design Ideas (DI) submission (in 1974) was for a 555 VFC. It was not only published but also selected as the best DI ...
.. for program and data storage. GPIO pins: 20 GPIO pins, supporting I 2 C, SPI, UART, PWM, and ADC functionality. Compact design: Tiny form factor similar to the Raspberry Pi Zero, ideal for space-constrained applications. Pin ...
.. 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 ...
.. 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 ...