I designed a boost converter using a 555 timer in order to power a Peltier device. This is mostly just for fun and to understand circuits a bit better.
I ordered all the parts so that they are the same as the simulated circuit in the pictures. The only component that might not be the same is the MOSFET. When I designed the physical circuit I used my voltmeter and found that the boost converter output stabilized around 60V using a 9V battery. This is without a load attached.
Before I connected the Peltier device, which requires 12V, I added a 100k resistor in series between it and the boost converter. Once connected I read 25V across the Peltier device, but the device didn't heat up. When I get a chance I'm going to review my design, but I wanted to see if any of you can see something I can not.