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S Andrew
  • Member for 8 years, 1 month
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5 votes
2 answers
5k views

How to save variables inside microcontrollers memory

4 votes
2 answers
1k views

Why is this MOSFET showing this behaviour?

3 votes
1 answer
2k views

Switching between battery voltage and solar voltage to control load. in solar charger?

3 votes
1 answer
265 views

Two different circuits not working on same power supply.?

3 votes
2 answers
857 views

Does this circuit have proper isolation?

3 votes
1 answer
5k views

MAX232 circuit not working

3 votes
4 answers
9k views

Why bridge rectifiers are used in case of DC power supply.?

2 votes
1 answer
460 views

What is the best way to receive unsolicited response from GSM SIM900 in PIC18

2 votes
4 answers
863 views

Using two power supplies to power microcontroller

1 vote
2 answers
232 views

Charging 12 V 7 Ah lead acid battery

1 vote
3 answers
7k views

What is the purpose of 9th pin in ULN2003

1 vote
2 answers
1k views

How to use UART rx data from ISR to main loop?

1 vote
1 answer
2k views

1 sec delay using PIC18F TImer 0

1 vote
0 answers
444 views

Error sending SMS to SIM900 in PIC

1 vote
1 answer
236 views

How to wait for '>' in SIM900 message format

0 votes
2 answers
366 views

Unable to receive response from SIM900

0 votes
4 answers
529 views

strstr function strange behaviour in PIC18F

0 votes
1 answer
3k views

ATD SIM900 response.?

0 votes
4 answers
1k views

Using voltage divider in a circuit

0 votes
2 answers
305 views

SIM900 Footprints do not match in Eagle

0 votes
1 answer
2k views

SIM900 Circuit Design. Where to connect PWRKEY of SIM900.?

0 votes
2 answers
1k views

How to detect pin state change in pulled up pins

0 votes
5 answers
280 views

How to check 4 inputs and set flag in Microcontroller

0 votes
1 answer
263 views

Is it safe to use Vcc from processor side or use another supply

0 votes
1 answer
3k views

SIM900 not getting powered on

0 votes
1 answer
2k views

SIM900 schematic verification

0 votes
2 answers
387 views

How to choose correct value of inductor in a circuit

0 votes
1 answer
297 views

Mosfet transistor circuit verification

0 votes
1 answer
3k views

Interfacing IR RC5 remote with STM32

0 votes
1 answer
335 views

Board layout for a blinker circuit