Uploaded March 2025 | Updated September 2026, 2 weeks ago
Designed to use compact and affordable 17.5mm film, Hit-type cameras were first introduced in the late 1930s but became wildly popular both in Japan and North America in the immediate post-war period. Hundreds of different copies were made by dozens of manufacturers until the 1970s.
0:00 Intro
1:04 17.5mm film
1:36 Midget and Micro Cameras
2:08 Origins of the Tougodo Company
4:30 1930s Tougodo Products
5:14 WWII
6:13 Creation of the HIT
7:28 HIT and Mighty Breakdown
10:29 The HIT Craze
12:07 End of the HIT
13:17 Outro
Minox Video: youtu.be/_tt5i-uQX8E
Minox Accessories Video: youtu.be/fPLzWjTLQ8c
Pseudo TLR Cameras Video: youtu.be/Yy7IdUirDXc
SOURCES
camera-wiki.org/wiki/Hit-type_cameras
camera-wiki.org/wiki/Midget
camera-wiki.org/wiki/Baby_Minolta
camera-wiki.org/wiki/Mycro
submin.com/17.5mm/collection/index.htm
submin.com/17.5mm/collection/gemflex/index.htm
submin.com/17.5mm/collection/babyflex/index.htm
web.archive.org/web/20080516091517/http://www.ephotozine.com/article/Collecting-Hit-type-cameras
camera-wiki.org/wiki/Tougodo
cameracollector.net/hit-type-camera-list
camera-wiki.org/wiki/No-need-darkroom
submin.com/17.5mm/collection
Designed to use compact and affordable 17.5mm film, Hit-type cameras were first introduced in the late 1930s but became wildly popular both in Japan and North America in the immediate post-war period. Hundreds of different copies were made by dozens of manufacturers until the 1970s.
0:00 Intro
1:04 17.5mm film
1:36 Midget and Micro Cameras
2:08 Origins of the Tougodo Company
4:30 1930s Tougodo Products
5:14 WWII
6:13 Creation of the HIT
7:28 HIT and Mighty Breakdown
10:29 The HIT Craze
12:07 End of the HIT
13:17 Outro
Minox Video: youtu.be/_tt5i-uQX8E
Minox Accessories Video: youtu.be/fPLzWjTLQ8c
Pseudo TLR Cameras Video: youtu.be/Yy7IdUirDXc
SOURCES
camera-wiki.org/wiki/Hit-type_cameras
camera-wiki.org/wiki/Midget
camera-wiki.org/wiki/Baby_Minolta
camera-wiki.org/wiki/Mycro
submin.com/17.5mm/collection/index.htm
submin.com/17.5mm/collection/gemflex/index.htm
submin.com/17.5mm/collection/babyflex/index.htm
web.archive.org/web/20080516091517/http://www.ephotozine.com/article/Collecting-Hit-type-cameras
camera-wiki.org/wiki/Tougodo
cameracollector.net/hit-type-camera-list
camera-wiki.org/wiki/No-need-darkroom
submin.com/17.5mm/collection

![Ford Model T Ignition Coil: a Spark of Genius
[ERRATUM: I accidentally misspoke and stated that the D in DELCO stood for DETROIT rather than DAYTON]
Early Ford vehicles from the Model A (1903) through the Model T (1908-1927) used an electrical ignition system based on trembler coils, high-voltage, high-frequency transformers adapted from the classic induction or Ruhmkorff coil. But while effective, this system struggled to achieve accurate ignition timing and was eventually replaced by the more reliable DELCO ignition coil system.
Medical Coils video: https://youtu.be/NufNhuWI1iA
Pocket Battery No.1 video: https://youtu.be/RCANKMhbGjw
0:00 Introduction
0:46 Non-Electrical Ignition
1:55 Ford Make-and-Break System
3:22 Trembler Coil Overview
4:11 Induction Coil Theory
7:17 Commutator/Distributor
7:52 Trembler Coil Box
8:24 Electrical System Evolution
9:57 Trembler Coil Shortcomings
11:07 Master-Slave Coil Systems
11:28 Joseph Williams Improvements
12:36 DELCO Ignition System
14:27 Other Ignition System
15:28 Ford Trembler Coil Evolution
19:15 Outro
SOURCES
http://www.aeroelectric.com/Reference_Docs/Books/Model_T_Ignition_System.pdf
https://www.history.com/this-day-in-history/august-29/charles-f-kettering-inventor-of-electric-self-starter-is-born
https://www.denso-am.eu/news/deneur21_04_ignition-coil-basic-principles
https://www.hotrod.com/how-to/inductive-vs-capacitive-discharge-ignition-systems#google_vignette
https://www.curbsideclassic.com/automotive-histories/automotive-history-the-history-of-electronic-ignition-losing-the-points-part-1/
https://patents.google.com/patent/US1223180A/en
https://www.modeltcentral.com/Model-T-Ford-Electrical-Specifications.html
https://www.larescorp.com/toolbox/skinned-knuckles-articles/the-model-t-ford-buzz-coil/
https://www.larescorp.com/toolbox/skinned-knuckles-articles/the-model-t-ford-buzz-coil/ Ford Model T Ignition Coil: a Spark of Genius](https://i.ytimg.com/vi/2FeTWTs5l0Y/mqdefault.jpg)








