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2

$begingroup$

I have purchased an LED flasher circuit from Ebay (see jpg) for use on a model plane, but the flash rate on the circuit is much too fast, about 4 flashes a second. I am trying to achieve 1 or 2 flashes a second. What component would I need to change to reduce the flash rate? I have listed the components in the PDF and have drawn out the circuit, so I hope that helps. Many thanks

led led-driver

share|improve this question

asked 3 hours ago

FerryMan69FerryMan69

111

New contributor

FerryMan69 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

add a comment | 

2

$begingroup$

I have purchased an LED flasher circuit from Ebay (see jpg) for use on a model plane, but the flash rate on the circuit is much too fast, about 4 flashes a second. I am trying to achieve 1 or 2 flashes a second. What component would I need to change to reduce the flash rate? I have listed the components in the PDF and have drawn out the circuit, so I hope that helps. Many thanks

led led-driver

share|improve this question

asked 3 hours ago

FerryMan69FerryMan69

111

New contributor

FerryMan69 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

add a comment | 

$begingroup$

I have purchased an LED flasher circuit from Ebay (see jpg) for use on a model plane, but the flash rate on the circuit is much too fast, about 4 flashes a second. I am trying to achieve 1 or 2 flashes a second. What component would I need to change to reduce the flash rate? I have listed the components in the PDF and have drawn out the circuit, so I hope that helps. Many thanks

led led-driver

share|improve this question

asked 3 hours ago

FerryMan69FerryMan69

111

New contributor

FerryMan69 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

share|improve this question

asked 3 hours ago

FerryMan69FerryMan69

111

New contributor

FerryMan69 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

asked 3 hours ago

FerryMan69FerryMan69

111

New contributor

FerryMan69 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 3 hours ago

FerryMan69FerryMan69

111

New contributor

FerryMan69 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 3 hours ago

FerryMan69FerryMan69

111

2 Answers
2

active

oldest

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3

$begingroup$

The fact that there's multiple operating modes indicates that HH5K1 is not in fact a simple device, but most probably a cheap microcontroller¹ or dedicated ASIC that does the blinking.
I'm afraid that means you can't swap anything to do what you want.

So, build a flasher from scratch that does what you want. I rarely do that, but here, using a NE555 might be the simplest thing to do; there's plenty of online circuit example that you can refer to, but frankly, the application examples in the datasheet(s) do contain astable multivibrators. Add a smallish capacitor and an BJT to the output – and tadah!, you've got a flasher.

Another option is going the same route as the manufacturer of the board you're looking at: Get some logic to do your work; a 0.30€ attiny would absolutely do the job.

---

¹ The 51 in the name might hint it's a 8051 core clone, but that's not going to help anyone – that thing, if programmable, is very likely only programmable once.

share|improve this answer

edited 3 hours ago

answered 3 hours ago

Marcus MüllerMarcus Müller

35.5k363101

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Thank you, Marcus for your super fast reply. I appreciate your help.
  $endgroup$
  – FerryMan69
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Thanks for the kind words – I'd accept an upvote, then!
  $endgroup$
  – Marcus Müller
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Its the least I can do. Up voted.
  $endgroup$
  – FerryMan69
  2 hours ago
  

  
  
  
  

add a comment | 

1

$begingroup$

FWIW, here's the schematic:

^{simulate this circuit – Schematic created using CircuitLab}

You could desolder the HH5K1 and put a PIC10F200 in its place (after programming it, of course).

• Pin 2 would connect to BAT-


• Pin 6 would connect to BAT+


• Pin 4 would connect to R2 and the MOSFETs

You'd just need to add a wire between pins 5 (Vdd) and 6 to power the chip.

share|improve this answer

answered 1 hour ago

Dave Tweed♦Dave Tweed

125k10155269

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Thank you Dave. That sounds like a good suggestion. I have never tried programming PIC's so it all a bit new to me. I will have to investigate this option.
  $endgroup$
  – FerryMan69
  59 mins ago
  

  
  
  
  

add a comment | 

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3

$begingroup$

The fact that there's multiple operating modes indicates that HH5K1 is not in fact a simple device, but most probably a cheap microcontroller¹ or dedicated ASIC that does the blinking.
I'm afraid that means you can't swap anything to do what you want.

So, build a flasher from scratch that does what you want. I rarely do that, but here, using a NE555 might be the simplest thing to do; there's plenty of online circuit example that you can refer to, but frankly, the application examples in the datasheet(s) do contain astable multivibrators. Add a smallish capacitor and an BJT to the output – and tadah!, you've got a flasher.

Another option is going the same route as the manufacturer of the board you're looking at: Get some logic to do your work; a 0.30€ attiny would absolutely do the job.

---

¹ The 51 in the name might hint it's a 8051 core clone, but that's not going to help anyone – that thing, if programmable, is very likely only programmable once.

share|improve this answer

edited 3 hours ago

answered 3 hours ago

Marcus MüllerMarcus Müller

35.5k363101

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Thank you, Marcus for your super fast reply. I appreciate your help.
  $endgroup$
  – FerryMan69
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Thanks for the kind words – I'd accept an upvote, then!
  $endgroup$
  – Marcus Müller
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Its the least I can do. Up voted.
  $endgroup$
  – FerryMan69
  2 hours ago
  

  
  
  
  

add a comment | 

3

$begingroup$

The fact that there's multiple operating modes indicates that HH5K1 is not in fact a simple device, but most probably a cheap microcontroller¹ or dedicated ASIC that does the blinking.
I'm afraid that means you can't swap anything to do what you want.

So, build a flasher from scratch that does what you want. I rarely do that, but here, using a NE555 might be the simplest thing to do; there's plenty of online circuit example that you can refer to, but frankly, the application examples in the datasheet(s) do contain astable multivibrators. Add a smallish capacitor and an BJT to the output – and tadah!, you've got a flasher.

Another option is going the same route as the manufacturer of the board you're looking at: Get some logic to do your work; a 0.30€ attiny would absolutely do the job.

---

¹ The 51 in the name might hint it's a 8051 core clone, but that's not going to help anyone – that thing, if programmable, is very likely only programmable once.

share|improve this answer

edited 3 hours ago

answered 3 hours ago

Marcus MüllerMarcus Müller

35.5k363101

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Thank you, Marcus for your super fast reply. I appreciate your help.
  $endgroup$
  – FerryMan69
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Thanks for the kind words – I'd accept an upvote, then!
  $endgroup$
  – Marcus Müller
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Its the least I can do. Up voted.
  $endgroup$
  – FerryMan69
  2 hours ago
  

  
  
  
  

add a comment | 

$begingroup$

The fact that there's multiple operating modes indicates that HH5K1 is not in fact a simple device, but most probably a cheap microcontroller¹ or dedicated ASIC that does the blinking.
I'm afraid that means you can't swap anything to do what you want.

So, build a flasher from scratch that does what you want. I rarely do that, but here, using a NE555 might be the simplest thing to do; there's plenty of online circuit example that you can refer to, but frankly, the application examples in the datasheet(s) do contain astable multivibrators. Add a smallish capacitor and an BJT to the output – and tadah!, you've got a flasher.

Another option is going the same route as the manufacturer of the board you're looking at: Get some logic to do your work; a 0.30€ attiny would absolutely do the job.

---

¹ The 51 in the name might hint it's a 8051 core clone, but that's not going to help anyone – that thing, if programmable, is very likely only programmable once.

share|improve this answer

edited 3 hours ago

answered 3 hours ago

Marcus MüllerMarcus Müller

35.5k363101

$endgroup$

share|improve this answer

edited 3 hours ago

answered 3 hours ago

Marcus MüllerMarcus Müller

35.5k363101

answered 3 hours ago

Marcus MüllerMarcus Müller

35.5k363101

answered 3 hours ago

Marcus MüllerMarcus Müller

35.5k363101

1

$begingroup$

FWIW, here's the schematic:

^{simulate this circuit – Schematic created using CircuitLab}

You could desolder the HH5K1 and put a PIC10F200 in its place (after programming it, of course).

• Pin 2 would connect to BAT-


• Pin 6 would connect to BAT+


• Pin 4 would connect to R2 and the MOSFETs

You'd just need to add a wire between pins 5 (Vdd) and 6 to power the chip.

share|improve this answer

answered 1 hour ago

Dave Tweed♦Dave Tweed

125k10155269

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Thank you Dave. That sounds like a good suggestion. I have never tried programming PIC's so it all a bit new to me. I will have to investigate this option.
  $endgroup$
  – FerryMan69
  59 mins ago
  

  
  
  
  

add a comment | 

1

$begingroup$

FWIW, here's the schematic:

^{simulate this circuit – Schematic created using CircuitLab}

You could desolder the HH5K1 and put a PIC10F200 in its place (after programming it, of course).

• Pin 2 would connect to BAT-


• Pin 6 would connect to BAT+


• Pin 4 would connect to R2 and the MOSFETs

You'd just need to add a wire between pins 5 (Vdd) and 6 to power the chip.

share|improve this answer

answered 1 hour ago

Dave Tweed♦Dave Tweed

125k10155269

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Thank you Dave. That sounds like a good suggestion. I have never tried programming PIC's so it all a bit new to me. I will have to investigate this option.
  $endgroup$
  – FerryMan69
  59 mins ago
  

  
  
  
  

add a comment | 

$begingroup$

FWIW, here's the schematic:

^{simulate this circuit – Schematic created using CircuitLab}

You could desolder the HH5K1 and put a PIC10F200 in its place (after programming it, of course).

• Pin 2 would connect to BAT-


• Pin 6 would connect to BAT+


• Pin 4 would connect to R2 and the MOSFETs

You'd just need to add a wire between pins 5 (Vdd) and 6 to power the chip.

share|improve this answer

answered 1 hour ago

Dave Tweed♦Dave Tweed

125k10155269

$endgroup$

share|improve this answer

answered 1 hour ago

Dave Tweed♦Dave Tweed

125k10155269

answered 1 hour ago

Dave Tweed♦Dave Tweed

125k10155269

answered 1 hour ago

Dave Tweed♦Dave Tweed

125k10155269