Model Boat Mayhem

Technical, Techniques, Hints, and Tips => The "Black Arts!" ( Electrics & Electronics ) => Topic started by: justboatonic on September 13, 2019, 04:03:19 pm

Title: What value is this resistor?
Post by: justboatonic on September 13, 2019, 04:03:19 pm
A small resistor has blown on SWMBO hair straighteners (dont ask!). Its a blue body with rings as follows; brown, black, black, black, brown. Anyone tell me what the resistance value is, please?
Thanks.
Title: Re: What value is this resistor?
Post by: RMH on September 13, 2019, 04:12:41 pm
This might help youhttp://www.ecobionlabs.com/index.php?page=resistor-basics-identification (http://www.ecobionlabs.com/index.php?page=resistor-basics-identification)

Title: Re: What value is this resistor?
Post by: C-3PO on September 13, 2019, 04:25:05 pm
I would imagine you need to consider resistor wattage rating as well as resistance value...

http://www.resistor-calculator.com/ (http://www.resistor-calculator.com/)

C-3PO
Title: Re: What value is this resistor?
Post by: Netleyned on September 13, 2019, 04:33:53 pm
Ask yourself, 'why has it blown?'
This is a mains appliance presumably
that SWIMBO is holding to her head.
Bin them and buy new I would say.


Ned
Title: Re: What value is this resistor?
Post by: malcolmfrary on September 13, 2019, 06:41:12 pm
Ask yourself, 'why has it blown?'
This is a mains appliance presumably
that SWIMBO is holding to her head.
Bin them and buy new I would say.


Ned
What he said.  These things are usually designed to be assembled once, but to be disassembled and put back together again.
Looking at [size=78%]https://www.allaboutcircuits.com/tools/resistor-color-code-calculator/ (https://www.allaboutcircuits.com/tools/resistor-color-code-calculator/)[/size] - 100 ohms at 1%, no clues as to wattage. 
Worked out as brown=1, black, black =0,0, multiplier (number of zeroes), black=0, brown gives a tolerance rating of 1%
Google is really wonderful sometimes.
Title: Re: What value is this resistor?
Post by: justboatonic on September 15, 2019, 12:32:22 pm
The resistor 'blew' because the swivel power connection was unsound causing sparking \ power surges. I fixed this connection so this no longer happened and applied a little conductive grease to it. I eventually worked out the resistor is 100 ohms.