Buck and Boost Drivers, Testing, Modding, and Discussion (Pic Heavy)

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snovotill
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And here’s another energy harvesting driver which will run an LED off of body heat via a Thermoelectric Peltier or TEG, only 25mV required! The resistor and capacitor in center can have two different value pairs, depending on the design revision. The caps with question marks need to be pulled off the board and measured out of circuit. They’re 0402 parts! You can buy the PCB for only $12 from the usual electronics component distributors.

sb56637
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Hi, please do not post embedded images, as they cause server load issues. All of the ones in this thread were just removed. Thanks.

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Barkuti
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sb56637 wrote:
Hi, please do not post embedded images, as they cause server load issues. …

What is considered an embedded image in this context? 

 

sb56637
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Barkuti wrote:

sb56637 wrote:
Hi, please do not post embedded images, as they cause server load issues. …

What is considered an embedded image in this context? 

 



<img src="data:image/png;base64,..." alt="Base64 encoded image"/>

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Barkuti
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Quick question fellows, does anyone knows which type of reverse polarity protection MOSFET the H1-A driver employs? It's the small 3 pin thing at the board backside, just g00gl€d the markings but no hits. The usage of such small MOSFET is also a tad strange to me, it totally looks inadequate given the amount of input current it should handle. 

 

kikkoman
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Barkuti wrote:

Quick question fellows, does anyone knows which type of reverse polarity protection MOSFET the H1-A driver employs? It’s the small 3 pin thing at the board backside, just g00gl€d the markings but no hits. The usage of such small MOSFET is also a tad strange to me, it totally looks inadequate given the amount of input current it should handle. 


 


Isn’t that the LDO?

Barkuti
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kikkoman wrote:
Barkuti wrote:

Isn't that the LDO?

Jensen567 commented something concerning reverse polarity protection in the past, now I can see it is present in the H2-C driver but not in the H1-A:

 

H2-C diagram

 

H1-A diagram

 

Came here with this tune in mind because a ForoLinternas fellow recently reported their H1-A driver blowing up because he tried to make it work with a cell in the wrong way. Aaaah! I understand now, master kikkoman

 

Cheers Party 

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