Circuits & Schematics: Design - 6

51. Switcher Adds Programmable-PWM-Duty-Cycle Clamp
    Circuits Supply
    .. the transformers could saturate, causing a catastrophic failure in the system. However, to drive down the cost of the design, many power-supply designers use inexpensive, eight-pin PWM controllers that have no duty-cycle clamp. This ...
    Oct 29, 2007

52. Car PSU
    Circuits Automotive Supply Power
    .. I only had 14 pin SOP versions so I used a DIP header and hacked it in. Three type of protection are incorporated in the design. First is a 6 amp Polyswitch fuse, it is self-resetting, and also protects against high temperatures. Next is ...
    Oct 31, 2007

53. Electronic Breadboard Templates
    Circuits Tools and Technologies
    .. markings and a fix to an Inkscape PDF export bug. The fix is required because I use a clipping object in the board design. The holes on the board are made up of clones of 5 x 5 sets of holes (themselves cloned from a single hole) ...
    Oct 30, 2007
54. Find Hex-Code Values for Microcontroller's ADC Voltages
    Circuits Microcontrollers Usage Theory
    .. 8-bit microcontroller programming with a simple formula to calculate hex values of ADC output. This Design Idea is for low-end, eight-pin, flash-memory, 8-bit microcontrollers, such as the MC68HC908QT4A from ...
    Nov 4, 2007
55. Circuits Monitor and Balance Large Lithium-Ion Batteries
    Circuits Supply
    .. self-discharge rates eventually lead to unequal levels of charge. Therefore, you must correct the cell balance. This Design Idea provides one strategy for protecting and balancing large, high-voltage batteries. The circuit in Figure ...
    Nov 14, 2007
56. Versatile Digital Speedometer Uses Few Components
    Circuits Measurement Domestic
    .. mechanical and moving-magnet designs that use analog moving-pointer displays, the electronic speedometer in this Design Idea features a digital readout and a power-saving device that uses few components. Figure 1 shows the ...
    Nov 14, 2007
57. Make your own Solar Bag
    Circuits Domestic Solar
    .. this part of the project: A bag. Either you transform one of your bags or you look for a new one that looks cool and has a design that makes it easy to integrate a solar panel. The later was the way we choose. A solar panel. Our ...
    Nov 16, 2007
58. Simple Digital Filter Cleans Up Noisy Data
    Circuits Measurement
    .. time constant of minutes would require very large values for R and C. Figure 1 shows an analog RC lowpass filter and its design equations. As an alternative, you can clean up noisy signals that remain within the ADC's linear range by ...
    Nov 28, 2007
59. Lowpass filter has improved step response
    John Guy
    Circuits Analogue Design Maxim MAX7409 MAX966
    .. common problem that arises when you design lowpass filters for signal conditioning is the filters' effect on the system's time-domain response. ...
    Oct 6, 2022
60. PWM DAC settles in one period of the pulse train
    Jordan Dimitrov
    Circuits Oscillators Microcontrollers Usage Texas Instruments TL071A LF398-N OPA2277. CD74HC02
    .. difficulties. The most important detail is that there are no suggestions on how to make the adjustment automatically. This Design Idea presents a circuit and a straightforward procedure to fill the gap. Using this method requires only one ...
    May 7, 2020

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