Hi Jon, another easy way to protect your input is to use a suitable voltage rated zener diode across the input. If the input is reversed, the fuse will blow, if the the diode gets overloaded and fails it will go short circuit. I am confident of the short circuit for 2 reasons. the first was that I tested 100 Zeners in various fail modes, they all went short circuit. More recently I used the parallel zener in a product of which there were more than 1000 in use in mobile situations and had more than 10 returned with a failed zener. At least 2 of them were seriously overloaded as I provided a short piece of track designed to fail (as a last protection) at about 20 amps. The equipment was protected in all cases. Just another concept to consider. Macca45
Hi, With regards the reverse protection consider the "LM73100, 2.7 - 23 V, 5.5 A Integrated Ideal Diode with Input Reverse Polarity and Overvoltage Protection". it is 5.5A but you can put two in parallel. They cost around £1.30ea but give very good protection and way cheaper than a new board. I use them in Test equipment myself.
Hi Jon, 'kiss' to solve the reverse protection, no diodes needed etc, use the right angle socket you have. Then the socket can only be fitted one way around so the polarity of the socket on your PCB will always be correct 🙂 Also the voltage set on your PSU, will appear exactly the same anywhere on your PCB.
![ลองสุ่มไอโฟน 990 โกงมั้ย? [ โกงมั้ยครับ ep.101 ] | DOM](http://i.ytimg.com/vi/bfsWe0j492k/mqdefault.jpg)
Hi Jon, another easy way to protect your input is to use a suitable voltage rated zener diode across the input. If the input is reversed, the fuse will blow, if the the diode gets overloaded and fails it will go short circuit. I am confident of the short circuit for 2 reasons. the first was that I tested 100 Zeners in various fail modes, they all went short circuit.
More recently I used the parallel zener in a product of which there were more than 1000 in use in mobile situations and had more than 10 returned with a failed zener. At least 2 of them were seriously overloaded as I provided a short piece of track designed to fail (as a last protection) at about 20 amps. The equipment was protected in all cases. Just another concept to consider.
Macca45
Hi, With regards the reverse protection consider the "LM73100, 2.7 - 23 V, 5.5 A Integrated Ideal Diode with Input Reverse Polarity and
Overvoltage Protection". it is 5.5A but you can put two in parallel. They cost around £1.30ea but give very good protection and way cheaper than a new board. I use them in Test equipment myself.
Hi Jon,
'kiss' to solve the reverse protection, no diodes needed etc, use the right angle socket you have.
Then the socket can only be fitted one way around so the polarity of the socket on your PCB will always be correct 🙂
Also the voltage set on your PSU, will appear exactly the same anywhere on your PCB.
Coming from a QBasic kid; Python dependencies are total trash; Even the code I made on machines is only school ladder logic.