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This is the standard configuration on how to Interface a uC like 8051 to PC RS232 with MAX232A. The UART or Serial port was not present in 8049/8749 chips which were the ancestors of 8051/8031. Pages of code were needed to make a software UART in MCS-48. The 8051 integrated the hardware UART and short [...] October 8th, 2009 | Category: Embedded-Systems | Leave a comment
When Instruments are designed a analog front end is essential and also as most equipment have digital or microcontroller interface the analog circuit needs to have digital access. The Circuits DACT0008 and DACT0009 are both useful in building instruments which have digital control. This circuit DACT0009 is similar to DACT0008 but gains of upto 100 [...] December 15th, 2008 | Category: Embedded-Systems, Opamp-Circuits, Test-Measurement | Leave a comment
When Instruments are designed a analog front end is essential and also as most equipment have digital or microcontroller interface the analog circuit needs to have digital access. The Circuits DACT0008 and DACT0009 are both useful in building instruments which have digital control. Precision Attenuator with digital control The Circuit DACT0008 is a programmable attenuator and the [...] December 10th, 2008 | Category: Embedded-Systems, Opamp-Circuits, Test-Measurement | Leave a comment
This circuit can be used as a low cost SRAM and Microcontroller-Microprocessor Battery Backup. All the diodes are 1N4148, The diodes prevent battery discharge back to power source. D8 gives a one way path to charge Battery thru R13 which limits current. D4 ensures a one way path of supply to chip when power is [...] |
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