I'm interested in implementing the circuit in the paper Robust, low-cost, auditable random number generation for embedded system security on a breadboard, so I can't easily use the same boost converter (TPS61041, which only comes in SMD form). I would also like to modify the circuit to run continuously rather than the alternating charge/generate cycles used in the paper.
After looking around, I'm having difficulty finding a comparable breadboard-friendly converter than can match my requirements. I could build my own charge pump using the Dickson topology to avoid having to generate AC, I could build an inverter-transformer-rectifier circuit to step it up, there may be some IC in DIP form that I just having come across yet, or there may be some better method I just haven't thought of.
How can I best achieve this 1.5V DC to 18V DC at 25mA voltage conversion in a breadboard-friendly fashion?