Interface a uC to PC RS232 with MAX232A
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...
Category: Embedded-Systems
555 watchdog for uC and uP systems
When the microcontroller hangs due to a spike, EMI or RFI etc. the 7555 will reset the uC, if proper power supply design is done above circuit can also give a clean power on...
RS232 with Opto-Isolation
I had to once interface an high voltage circuit to PC, The uC had to communicate thru RS232–Comm port–Serial Port. Part of the 80C31 8051 SBC Even though i had isolation at the sensors...
Voltage to Frequency Converter AD Interface
This is the Analog front end of the 80C39 Process Controller. The analog input is protected by a Zener barrier, low leakage. You could use clamping diodes too. The non-inverting low-offset amp offers high input impedance....
